GoodWe inverter & battery error codes and what they mean

What it means: The inverter cannot see a normal mains supply, so it has stopped exporting to the grid (and a hybrid system may switch to backup).

Likely causes:

• Power outage in your street or area
• A tripped or switched-off solar/inverter circuit breaker in the switchboard
• Loose AC connection between the switchboard and the inverter

What you can safely do:

• Check whether the rest of the house (or your neighbours) has power, and check your network operator's outage map
• Check the switchboard for a tripped solar supply main switch or inverter breaker. Only reset it once. If it trips again, leave it off and call an electrician
• Wait. Once normal grid power is back, the inverter normally reconnects by itself after its safety checks (often a few minutes)
• If grid power is normal but the alarm stays, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The mains voltage the inverter measured was outside the limits allowed for your network, so it disconnected or reduced output to protect the grid. This is usually a grid condition, not a faulty inverter.

Likely causes:

• High street voltage, common on sunny afternoons when many homes export solar
• Grid disturbances or voltage dips
• Long or undersized AC cabling between the inverter and the switchboard (installation issue)
• Grid protection settings that don't match your network's requirements

What you can safely do:

• Wait. The inverter reconnects by itself once voltage is back within limits
• Note the time of day it happens. If it happens most sunny days, tell us, because it may need a voltage check or a report to your network operator
• Don't try to change grid protection settings yourself. In Australia they are set to AS/NZS 4777.2 and your network operator's requirements

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The mains voltage the inverter measured was outside the limits allowed for your network, so it disconnected or reduced output to protect the grid. This is usually a grid condition, not a faulty inverter.

Likely causes:

• High street voltage, common on sunny afternoons when many homes export solar
• Grid disturbances or voltage dips
• Long or undersized AC cabling between the inverter and the switchboard (installation issue)
• Grid protection settings that don't match your network's requirements

What you can safely do:

• Wait. The inverter reconnects by itself once voltage is back within limits
• Note the time of day it happens. If it happens most sunny days, tell us, because it may need a voltage check or a report to your network operator
• Don't try to change grid protection settings yourself. In Australia they are set to AS/NZS 4777.2 and your network operator's requirements

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The mains voltage the inverter measured was outside the limits allowed for your network, so it disconnected or reduced output to protect the grid. This is usually a grid condition, not a faulty inverter.

Likely causes:

• High street voltage, common on sunny afternoons when many homes export solar
• Grid disturbances or voltage dips
• Long or undersized AC cabling between the inverter and the switchboard (installation issue)
• Grid protection settings that don't match your network's requirements

What you can safely do:

• Wait. The inverter reconnects by itself once voltage is back within limits
• Note the time of day it happens. If it happens most sunny days, tell us, because it may need a voltage check or a report to your network operator
• Don't try to change grid protection settings yourself. In Australia they are set to AS/NZS 4777.2 and your network operator's requirements

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The mains voltage the inverter measured was outside the limits allowed for your network, so it disconnected or reduced output to protect the grid. This is usually a grid condition, not a faulty inverter.

Likely causes:

• High street voltage, common on sunny afternoons when many homes export solar
• Grid disturbances or voltage dips
• Long or undersized AC cabling between the inverter and the switchboard (installation issue)
• Grid protection settings that don't match your network's requirements

What you can safely do:

• Wait. The inverter reconnects by itself once voltage is back within limits
• Note the time of day it happens. If it happens most sunny days, tell us, because it may need a voltage check or a report to your network operator
• Don't try to change grid protection settings yourself. In Australia they are set to AS/NZS 4777.2 and your network operator's requirements

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: Grid frequency moved outside the allowed range, so the inverter disconnected or reduced output as the standards require.

Likely causes:

• Short grid disturbance
• Running on a generator or a weak supply
• Grid settings that don't match the local network

What you can safely do:

• Wait for automatic reconnection
• If it happens often, record the times and contact us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: Grid frequency moved outside the allowed range, so the inverter disconnected or reduced output as the standards require.

Likely causes:

• Short grid disturbance
• Running on a generator or a weak supply
• Grid settings that don't match the local network

What you can safely do:

• Wait for automatic reconnection
• If it happens often, record the times and contact us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: Grid frequency moved outside the allowed range, so the inverter disconnected or reduced output as the standards require.

Likely causes:

• Short grid disturbance
• Running on a generator or a weak supply
• Grid settings that don't match the local network

What you can safely do:

• Wait for automatic reconnection
• If it happens often, record the times and contact us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

Likely causes:

• Grid disturbance or partial outage (for example one phase lost on a 3-phase supply)
• Supply problems on the network side
• Wiring or phase-order errors at installation (if it shows up from day one)

What you can safely do:

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The mains voltage the inverter measured was outside the limits allowed for your network, so it disconnected or reduced output to protect the grid. This is usually a grid condition, not a faulty inverter.

Likely causes:

• High street voltage, common on sunny afternoons when many homes export solar
• Grid disturbances or voltage dips
• Long or undersized AC cabling between the inverter and the switchboard (installation issue)
• Grid protection settings that don't match your network's requirements

What you can safely do:

• Wait. The inverter reconnects by itself once voltage is back within limits
• Note the time of day it happens. If it happens most sunny days, tell us, because it may need a voltage check or a report to your network operator
• Don't try to change grid protection settings yourself. In Australia they are set to AS/NZS 4777.2 and your network operator's requirements

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The mains voltage the inverter measured was outside the limits allowed for your network, so it disconnected or reduced output to protect the grid. This is usually a grid condition, not a faulty inverter.

Likely causes:

• High street voltage, common on sunny afternoons when many homes export solar
• Grid disturbances or voltage dips
• Long or undersized AC cabling between the inverter and the switchboard (installation issue)
• Grid protection settings that don't match your network's requirements

What you can safely do:

• Wait. The inverter reconnects by itself once voltage is back within limits
• Note the time of day it happens. If it happens most sunny days, tell us, because it may need a voltage check or a report to your network operator
• Don't try to change grid protection settings yourself. In Australia they are set to AS/NZS 4777.2 and your network operator's requirements

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter measured leakage (residual) current flowing to earth above its safety limit and disconnected. This can indicate damaged insulation somewhere in the system.

Likely causes:

• Damaged DC or AC cable insulation
• Moisture in connectors or equipment
• A one-off disturbance (if it happens once and never again)

What you can safely do:

• Don't touch cabling or equipment
• If it happens repeatedly, or together with an insulation/isolation alarm, call an electrician or us promptly

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter measured leakage (residual) current flowing to earth above its safety limit and disconnected. This can indicate damaged insulation somewhere in the system.

Likely causes:

• Damaged DC or AC cable insulation
• Moisture in connectors or equipment
• A one-off disturbance (if it happens once and never again)

What you can safely do:

• Don't touch cabling or equipment
• If it happens repeatedly, or together with an insulation/isolation alarm, call an electrician or us promptly

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter measured leakage (residual) current flowing to earth above its safety limit and disconnected. This can indicate damaged insulation somewhere in the system.

Likely causes:

• Damaged DC or AC cable insulation
• Moisture in connectors or equipment
• A one-off disturbance (if it happens once and never again)

What you can safely do:

• Don't touch cabling or equipment
• If it happens repeatedly, or together with an insulation/isolation alarm, call an electrician or us promptly

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter measured leakage (residual) current flowing to earth above its safety limit and disconnected. This can indicate damaged insulation somewhere in the system.

Likely causes:

• Damaged DC or AC cable insulation
• Moisture in connectors or equipment
• A one-off disturbance (if it happens once and never again)

What you can safely do:

• Don't touch cabling or equipment
• If it happens repeatedly, or together with an insulation/isolation alarm, call an electrician or us promptly

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter detected too much DC current in its AC output, which the grid standards don't allow, so it disconnected.

Likely causes:

• A one-off disturbance (if it is occasional)
• Internal measuring or power stage problem (if it repeats)

What you can safely do:

• If it happened once and the system recovered, keep an eye on it
• If it repeats, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter detected too much DC current in its AC output, which the grid standards don't allow, so it disconnected.

Likely causes:

• A one-off disturbance (if it is occasional)
• Internal measuring or power stage problem (if it repeats)

What you can safely do:

• If it happened once and the system recovered, keep an eye on it
• If it repeats, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter measured low insulation resistance between the PV strings or battery port and earth. GoodWe notes that Australian/NZ units raise an earth fault alarm for this. Treat it as an electrical safety issue.

Likely causes:

• Damaged DC cable insulation (for example from rodents, UV or a pinched cable)
• Water in a DC connector, isolator or junction box
• A damaged solar panel or backsheet
• Heavy dew or rain can trigger it temporarily on marginal systems

What you can safely do:

• Do not touch panels, DC cables, rooftop isolators or the inverter's DC connectors
• If it clears by itself after the weather dries out, still report it, because repeated alarms point to a developing fault
• Book an electrician or call us. An insulation test needs specialist equipment
• If you see smoke, burn marks or smell burning, keep clear and call 000

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter detected a problem with the earth (protective earth/PE) or with the neutral-to-earth connection. A sound earth is essential for electrical safety.

Likely causes:

• Loose or missing earth connection on the inverter or array
• Neutral and earth problem in the AC wiring or switchboard
• Fault in the building's main earth

What you can safely do:

• Do not touch the inverter, frames or cabling
• Leave the system off if it has shut down. Call a licensed electrician or us to test the earthing

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter isn't getting correct readings from its energy meter or current sensor (CT). This affects export limiting, battery charging and monitoring accuracy.

Likely causes:

• Meter or CT communication cable loose or damaged
• CT clamp fitted on the wrong cable or the wrong way round
• Meter has lost power or is faulty

What you can safely do:

• Check the app. Generation may still be running normally
• Don't open the switchboard
• Call us to check the meter/CT wiring. If your system has an export limit, this needs fixing promptly

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: A problem was detected with a connected generator input (voltage, frequency, wiring or start-up).

Likely causes:

• Generator output out of range
• Generator wiring or phase-order error
• Generator failed to start

What you can safely do:

• Check the generator itself (fuel, its own alarms)
• Call us to check the generator integration

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: A problem was detected with a connected generator input (voltage, frequency, wiring or start-up).

Likely causes:

• Generator output out of range
• Generator wiring or phase-order error
• Generator failed to start

What you can safely do:

• Check the generator itself (fuel, its own alarms)
• Call us to check the generator integration

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: A problem was detected with a connected generator input (voltage, frequency, wiring or start-up).

Likely causes:

• Generator output out of range
• Generator wiring or phase-order error
• Generator failed to start

What you can safely do:

• Check the generator itself (fuel, its own alarms)
• Call us to check the generator integration

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: A problem was detected with a connected generator input (voltage, frequency, wiring or start-up).

Likely causes:

• Generator output out of range
• Generator wiring or phase-order error
• Generator failed to start

What you can safely do:

• Check the generator itself (fuel, its own alarms)
• Call us to check the generator integration

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: A problem was detected with a connected generator input (voltage, frequency, wiring or start-up).

Likely causes:

• Generator output out of range
• Generator wiring or phase-order error
• Generator failed to start

What you can safely do:

• Check the generator itself (fuel, its own alarms)
• Call us to check the generator integration

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: A problem was detected with a connected generator input (voltage, frequency, wiring or start-up).

Likely causes:

• Generator output out of range
• Generator wiring or phase-order error
• Generator failed to start

What you can safely do:

• Check the generator itself (fuel, its own alarms)
• Call us to check the generator integration

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter has detected an AC wiring problem, for example active and neutral swapped or a connection made the wrong way round.

Likely causes:

• AC wiring error at installation or after other electrical work
• Wiring on the meter or CT the wrong way round

What you can safely do:

• Do not touch any wiring
• Leave the system as it is and book a licensed electrician (or call us)

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter is running too hot, so it has reduced output or paused to protect itself.

Likely causes:

• High ambient temperature or direct afternoon sun on the inverter
• Blocked air vents or heat sink (dust, cobwebs, stored items)
• A fan problem (on fan-cooled models)

What you can safely do:

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The DC voltage coming from the solar panels is higher than the inverter is rated for. Over-voltage can damage the inverter.

Likely causes:

• Too many panels wired in series in a string (system design/installation issue)
• Very cold, bright mornings raise panel voltage
• Incorrect panel or string configuration after a change to the system

What you can safely do:

• Do not touch the DC isolator or cables unless the manufacturer's owner shutdown tells you to
• Call us. The string design needs to be checked by a licensed installer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: A problem was detected with a connected generator input (voltage, frequency, wiring or start-up).

Likely causes:

• Generator output out of range
• Generator wiring or phase-order error
• Generator failed to start

What you can safely do:

• Check the generator itself (fuel, its own alarms)
• Call us to check the generator integration

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter's arc-fault detection has picked up a pattern that looks like electrical arcing on the DC (solar) side, which can be a fire risk. The inverter shuts down DC power flow as a precaution.

Likely causes:

• Loose or poorly crimped DC connector
• Damaged DC cable
• Water or corrosion in a DC connector or isolator

What you can safely do:

• Do not reset it repeatedly and do not touch DC cables or isolators
• If you see smoke or flames or smell burning, keep clear and call 000
• Call us or a licensed electrician to inspect the DC wiring before the system is restarted

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

Likely causes:

• Grid disturbance or partial outage (for example one phase lost on a 3-phase supply)
• Supply problems on the network side
• Wiring or phase-order errors at installation (if it shows up from day one)

What you can safely do:

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

Likely causes:

• Grid disturbance or partial outage (for example one phase lost on a 3-phase supply)
• Supply problems on the network side
• Wiring or phase-order errors at installation (if it shows up from day one)

What you can safely do:

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

Likely causes:

• Grid disturbance or partial outage (for example one phase lost on a 3-phase supply)
• Supply problems on the network side
• Wiring or phase-order errors at installation (if it shows up from day one)

What you can safely do:

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

Likely causes:

• Grid disturbance or partial outage (for example one phase lost on a 3-phase supply)
• Supply problems on the network side
• Wiring or phase-order errors at installation (if it shows up from day one)

What you can safely do:

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

Likely causes:

• Grid disturbance or partial outage (for example one phase lost on a 3-phase supply)
• Supply problems on the network side
• Wiring or phase-order errors at installation (if it shows up from day one)

What you can safely do:

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

Likely causes:

• Grid disturbance or partial outage (for example one phase lost on a 3-phase supply)
• Supply problems on the network side
• Wiring or phase-order errors at installation (if it shows up from day one)

What you can safely do:

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter detected a problem with the earth (protective earth/PE) or with the neutral-to-earth connection. A sound earth is essential for electrical safety.

Likely causes:

• Loose or missing earth connection on the inverter or array
• Neutral and earth problem in the AC wiring or switchboard
• Fault in the building's main earth

What you can safely do:

• Do not touch the inverter, frames or cabling
• Leave the system off if it has shut down. Call a licensed electrician or us to test the earthing

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter detected too much DC current in its AC output, which the grid standards don't allow, so it disconnected.

Likely causes:

• A one-off disturbance (if it is occasional)
• Internal measuring or power stage problem (if it repeats)

What you can safely do:

• If it happened once and the system recovered, keep an eye on it
• If it repeats, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter detected too much DC current in its AC output, which the grid standards don't allow, so it disconnected.

Likely causes:

• A one-off disturbance (if it is occasional)
• Internal measuring or power stage problem (if it repeats)

What you can safely do:

• If it happened once and the system recovered, keep an eye on it
• If it repeats, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter measured leakage (residual) current flowing to earth above its safety limit and disconnected. This can indicate damaged insulation somewhere in the system.

Likely causes:

• Damaged DC or AC cable insulation
• Moisture in connectors or equipment
• A one-off disturbance (if it happens once and never again)

What you can safely do:

• Don't touch cabling or equipment
• If it happens repeatedly, or together with an insulation/isolation alarm, call an electrician or us promptly

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter's arc-fault detection has picked up a pattern that looks like electrical arcing on the DC (solar) side, which can be a fire risk. The inverter shuts down DC power flow as a precaution.

Likely causes:

• Loose or poorly crimped DC connector
• Damaged DC cable
• Water or corrosion in a DC connector or isolator

What you can safely do:

• Do not reset it repeatedly and do not touch DC cables or isolators
• If you see smoke or flames or smell burning, keep clear and call 000
• Call us or a licensed electrician to inspect the DC wiring before the system is restarted

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: A monitoring or communication accessory (Wi-Fi/4G/data logger, display or clock) is reporting a problem. This usually doesn't stop the system generating.

Likely causes:

• Home Wi-Fi router changed, moved or restarted
• Weak Wi-Fi or mobile signal at the inverter
• Monitoring module or SIM/data issue

What you can safely do:

• Restart your home router and check it reaches the inverter location
• If you changed router or Wi-Fi password, the dongle needs reconfiguring (see the manufacturer's app guide or ask us)
• If generation looks normal but the alarm persists, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

Likely causes:

• Too many or too large appliances on backup circuits during an outage (for example ovens, air conditioners, pumps)
• High start-up surge from motors or compressors
• A short circuit on a backup circuit

What you can safely do:

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

Likely causes:

• Too many or too large appliances on backup circuits during an outage (for example ovens, air conditioners, pumps)
• High start-up surge from motors or compressors
• A short circuit on a backup circuit

What you can safely do:

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter isn't getting correct readings from its energy meter or current sensor (CT). This affects export limiting, battery charging and monitoring accuracy.

Likely causes:

• Meter or CT communication cable loose or damaged
• CT clamp fitted on the wrong cable or the wrong way round
• Meter has lost power or is faulty

What you can safely do:

• Check the app. Generation may still be running normally
• Don't open the switchboard
• Call us to check the meter/CT wiring. If your system has an export limit, this needs fixing promptly

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

Likely causes:

• Too many or too large appliances on backup circuits during an outage (for example ovens, air conditioners, pumps)
• High start-up surge from motors or compressors
• A short circuit on a backup circuit

What you can safely do:

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter is running too hot, so it has reduced output or paused to protect itself.

Likely causes:

• High ambient temperature or direct afternoon sun on the inverter
• Blocked air vents or heat sink (dust, cobwebs, stored items)
• A fan problem (on fan-cooled models)

What you can safely do:

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter is running too hot, so it has reduced output or paused to protect itself.

Likely causes:

• High ambient temperature or direct afternoon sun on the inverter
• Blocked air vents or heat sink (dust, cobwebs, stored items)
• A fan problem (on fan-cooled models)

What you can safely do:

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter is running too hot, so it has reduced output or paused to protect itself.

Likely causes:

• High ambient temperature or direct afternoon sun on the inverter
• Blocked air vents or heat sink (dust, cobwebs, stored items)
• A fan problem (on fan-cooled models)

What you can safely do:

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter is running too hot, so it has reduced output or paused to protect itself.

Likely causes:

• High ambient temperature or direct afternoon sun on the inverter
• Blocked air vents or heat sink (dust, cobwebs, stored items)
• A fan problem (on fan-cooled models)

What you can safely do:

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: There is a firmware, model or configuration mismatch between parts of the system, so it can't run normally.

Likely causes:

• Interrupted or partial firmware update
• Parts replaced with different firmware versions
• Incorrect model or country/region setting

What you can safely do:

• Don't try to reflash firmware yourself unless the manufacturer's app tells you to and it's an owner function
• Call us. We can arrange a firmware update or reconfiguration with the manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: There is a firmware, model or configuration mismatch between parts of the system, so it can't run normally.

Likely causes:

• Interrupted or partial firmware update
• Parts replaced with different firmware versions
• Incorrect model or country/region setting

What you can safely do:

• Don't try to reflash firmware yourself unless the manufacturer's app tells you to and it's an owner function
• Call us. We can arrange a firmware update or reconfiguration with the manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter has stopped or limited export to stay within the export limit set for your site, usually because meter readings dropped out or power briefly flowed the wrong way.

Likely causes:

• Meter or CT communication cable loose or damaged
• CT clamp fitted on the wrong cable or the wrong way round
• Meter has lost power or is faulty

What you can safely do:

• Check the app. Generation may still be running normally
• Don't open the switchboard
• Call us to check the meter/CT wiring. If your system has an export limit, this needs fixing promptly

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

Likely causes:

• Too many or too large appliances on backup circuits during an outage (for example ovens, air conditioners, pumps)
• High start-up surge from motors or compressors
• A short circuit on a backup circuit

What you can safely do:

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

Likely causes:

• Too many or too large appliances on backup circuits during an outage (for example ovens, air conditioners, pumps)
• High start-up surge from motors or compressors
• A short circuit on a backup circuit

What you can safely do:

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

Likely causes:

• Too many or too large appliances on backup circuits during an outage (for example ovens, air conditioners, pumps)
• High start-up surge from motors or compressors
• A short circuit on a backup circuit

What you can safely do:

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: There is a firmware, model or configuration mismatch between parts of the system, so it can't run normally.

Likely causes:

• Interrupted or partial firmware update
• Parts replaced with different firmware versions
• Incorrect model or country/region setting

What you can safely do:

• Don't try to reflash firmware yourself unless the manufacturer's app tells you to and it's an owner function
• Call us. We can arrange a firmware update or reconfiguration with the manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

Likely causes:

• High ambient temperature or direct sun on the battery
• Poor ventilation around the battery
• Heavy charge/discharge loads
• An internal battery fault

What you can safely do:

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter temperature is below its operating range.

Likely causes:

• Very cold ambient conditions

What you can safely do:

• Wait for temperatures to rise. It should recover by itself
• If it persists in normal weather, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: A surge protection device (SPD) inside or connected to the inverter is reporting a fault, often after a lightning storm or grid surge.

Likely causes:

• SPD has done its job after a surge and now needs replacing
• SPD wiring fault

What you can safely do:

• Don't open the inverter
• Call us. SPDs must be replaced by a licensed electrician

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: A surge protection device (SPD) inside or connected to the inverter is reporting a fault, often after a lightning storm or grid surge.

Likely causes:

• SPD has done its job after a surge and now needs replacing
• SPD wiring fault

What you can safely do:

• Don't open the inverter
• Call us. SPDs must be replaced by a licensed electrician

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: A cooling fan isn't working properly, which can make the unit run hot and reduce output.

Likely causes:

• Fan blocked by debris
• Fan worn or failed
• Fan wiring fault

What you can safely do:

• From outside, check that nothing is blocking the vents
• Don't open the unit
• Call us to arrange a fan check or replacement

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: A cooling fan isn't working properly, which can make the unit run hot and reduce output.

Likely causes:

• Fan blocked by debris
• Fan worn or failed
• Fan wiring fault

What you can safely do:

• From outside, check that nothing is blocking the vents
• Don't open the unit
• Call us to arrange a fan check or replacement

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The system has received a shutdown or control signal, or a protective input has been triggered (for example an emergency stop, demand response or external switch).

Likely causes:

• Emergency stop or external shutdown switch operated
• Network/demand response command
• Wiring fault on the control input (if nobody operated a switch)

What you can safely do:

• Check whether anyone operated an emergency stop or shutdown switch on purpose
• If so, follow the manual to release it only when it is safe
• If nobody did, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter isn't getting correct readings from its energy meter or current sensor (CT). This affects export limiting, battery charging and monitoring accuracy.

Likely causes:

• Meter or CT communication cable loose or damaged
• CT clamp fitted on the wrong cable or the wrong way round
• Meter has lost power or is faulty

What you can safely do:

• Check the app. Generation may still be running normally
• Don't open the switchboard
• Call us to check the meter/CT wiring. If your system has an export limit, this needs fixing promptly

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: One solar string is behaving differently from the others (lower output or current flowing the wrong way), which often points to a panel, connector or configuration issue.

Likely causes:

• Shading or heavy dirt on part of the array
• Different panel counts or orientations on strings sharing an input
• Faulty panel, connector or cable

What you can safely do:

• From the ground, check for new shading (trees, new structures) or obvious debris
• Compare string readings in your monitoring app if available
• Book a service check if it continues

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: One solar string is behaving differently from the others (lower output or current flowing the wrong way), which often points to a panel, connector or configuration issue.

Likely causes:

• Shading or heavy dirt on part of the array
• Different panel counts or orientations on strings sharing an input
• Faulty panel, connector or cable

What you can safely do:

• From the ground, check for new shading (trees, new structures) or obvious debris
• Compare string readings in your monitoring app if available
• Book a service check if it continues

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter isn't getting correct readings from its energy meter or current sensor (CT). This affects export limiting, battery charging and monitoring accuracy.

Likely causes:

• Meter or CT communication cable loose or damaged
• CT clamp fitted on the wrong cable or the wrong way round
• Meter has lost power or is faulty

What you can safely do:

• Check the app. Generation may still be running normally
• Don't open the switchboard
• Call us to check the meter/CT wiring. If your system has an export limit, this needs fixing promptly

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter isn't getting correct readings from its energy meter or current sensor (CT). This affects export limiting, battery charging and monitoring accuracy.

Likely causes:

• Meter or CT communication cable loose or damaged
• CT clamp fitted on the wrong cable or the wrong way round
• Meter has lost power or is faulty

What you can safely do:

• Check the app. Generation may still be running normally
• Don't open the switchboard
• Call us to check the meter/CT wiring. If your system has an export limit, this needs fixing promptly

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter detected a problem with the earth (protective earth/PE) or with the neutral-to-earth connection. A sound earth is essential for electrical safety.

Likely causes:

• Loose or missing earth connection on the inverter or array
• Neutral and earth problem in the AC wiring or switchboard
• Fault in the building's main earth

What you can safely do:

• Do not touch the inverter, frames or cabling
• Leave the system off if it has shut down. Call a licensed electrician or us to test the earthing

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter is running too hot, so it has reduced output or paused to protect itself.

Likely causes:

• High ambient temperature or direct afternoon sun on the inverter
• Blocked air vents or heat sink (dust, cobwebs, stored items)
• A fan problem (on fan-cooled models)

What you can safely do:

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter is running too hot, so it has reduced output or paused to protect itself.

Likely causes:

• High ambient temperature or direct afternoon sun on the inverter
• Blocked air vents or heat sink (dust, cobwebs, stored items)
• A fan problem (on fan-cooled models)

What you can safely do:

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter is running too hot, so it has reduced output or paused to protect itself.

Likely causes:

• High ambient temperature or direct afternoon sun on the inverter
• Blocked air vents or heat sink (dust, cobwebs, stored items)
• A fan problem (on fan-cooled models)

What you can safely do:

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: A solar string or the battery appears to be connected with positive and negative swapped.

Likely causes:

• Polarity error during installation or maintenance

What you can safely do:

• Do not touch any DC wiring
• Call us or a licensed electrician

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery's state of charge or voltage is low, so the system has stopped discharging it to protect the cells.

Likely causes:

• Battery has been used down to its reserve level
• Several cloudy days with little solar to recharge
• Charging is disabled by the settings or by another fault

What you can safely do:

• Allow it to recharge from solar (or the grid, if your settings allow)
• Check the app for other alarms that could be stopping charging
• If it stays low for days in good sun, call us. Batteries left flat for long periods can be damaged

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter measured low insulation resistance between the solar/battery DC circuits and earth. In Australia this is treated as an earth fault alarm, and the system must be checked by a licensed electrician.

Likely causes:

• Damaged DC cable insulation (for example from rodents, UV or a pinched cable)
• Water in a DC connector, isolator or junction box
• A damaged solar panel or backsheet
• Heavy dew or rain can trigger it temporarily on marginal systems

What you can safely do:

• Do not touch panels, DC cables, rooftop isolators or the inverter's DC connectors
• If it clears by itself after the weather dries out, still report it, because repeated alarms point to a developing fault
• Book an electrician or call us. An insulation test needs specialist equipment
• If you see smoke, burn marks or smell burning, keep clear and call 000

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

Likely causes:

• Too many or too large appliances on backup circuits during an outage (for example ovens, air conditioners, pumps)
• High start-up surge from motors or compressors
• A short circuit on a backup circuit

What you can safely do:

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The system has stopped and is waiting for a manual reset. GoodWe gives no further detail in the manual, so treat it as needing a service check.

Likely causes:

• Not specified by the manufacturer

What you can safely do:

• Note the time and any other alarms in the app
• Call us to arrange a check

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: A problem was detected with a connected generator input (voltage, frequency, wiring or start-up).

Likely causes:

• Generator output out of range
• Generator wiring or phase-order error
• Generator failed to start

What you can safely do:

• Check the generator itself (fuel, its own alarms)
• Call us to check the generator integration

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

Likely causes:

• Too many or too large appliances on backup circuits during an outage (for example ovens, air conditioners, pumps)
• High start-up surge from motors or compressors
• A short circuit on a backup circuit

What you can safely do:

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

Likely causes:

• Grid disturbance or partial outage (for example one phase lost on a 3-phase supply)
• Supply problems on the network side
• Wiring or phase-order errors at installation (if it shows up from day one)

What you can safely do:

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

Likely causes:

• Grid disturbance or partial outage (for example one phase lost on a 3-phase supply)
• Supply problems on the network side
• Wiring or phase-order errors at installation (if it shows up from day one)

What you can safely do:

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The rate of change of the grid voltage phase was outside what your local grid standard allows, so the inverter disconnected.

Likely causes:

• Grid disturbance or partial outage (for example one phase lost on a 3-phase supply)
• Supply problems on the network side
• Wiring or phase-order errors at installation (if it shows up from day one)

What you can safely do:

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: A solar string or the battery appears to be connected with positive and negative swapped.

Likely causes:

• Polarity error during installation or maintenance

What you can safely do:

• Do not touch any DC wiring
• Call us or a licensed electrician

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: Current on one or more solar strings is above the limit, or the string current sensor is reading abnormally.

Likely causes:

• String overcurrent (configuration or wiring fault)
• Faulty string current sensor

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter sees no input from a string, and GoodWe points to an open string fuse (on models with string fuses).

Likely causes:

• String fuse open (if fitted)
• Disconnected or damaged string connector/cable

What you can safely do:

• From the ground, check for new shading (trees, new structures) or obvious debris
• Compare string readings in your monitoring app if available
• Book a service check if it continues

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The inverter has a record that a string was connected with reversed polarity at some point, which caused the trip switch to operate. A technician needs to check the string before the warning is cleared in the app.

Likely causes:

• Polarity error during installation or maintenance

What you can safely do:

• Do not touch any DC wiring
• Call us or a licensed electrician

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 1)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 2)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 3)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 4)

What it means: The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

Likely causes:

• High ambient temperature or direct sun on the battery
• Poor ventilation around the battery
• Heavy charge/discharge loads
• An internal battery fault

What you can safely do:

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 5)

What it means: The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

Likely causes:

• High ambient temperature or direct sun on the battery
• Poor ventilation around the battery
• Heavy charge/discharge loads
• An internal battery fault

What you can safely do:

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 6)

What it means: The battery is too cold to charge or discharge safely, so it is pausing until it warms up.

Likely causes:

• Cold overnight or winter temperatures where the battery is installed

What you can safely do:

• Wait for the battery to warm up. Most systems recover automatically
• If it happens often, ask us whether the location or a heating feature (where the model has one) should be reviewed

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 7)

What it means: The battery is too cold to charge or discharge safely, so it is pausing until it warms up.

Likely causes:

• Cold overnight or winter temperatures where the battery is installed

What you can safely do:

• Wait for the battery to warm up. Most systems recover automatically
• If it happens often, ask us whether the location or a heating feature (where the model has one) should be reviewed

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 8)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 9)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 10)

What it means: The inverter measured low insulation resistance between the solar/battery DC circuits and earth. In Australia this is treated as an earth fault alarm, and the system must be checked by a licensed electrician.

Likely causes:

• Damaged DC cable insulation (for example from rodents, UV or a pinched cable)
• Water in a DC connector, isolator or junction box
• A damaged solar panel or backsheet
• Heavy dew or rain can trigger it temporarily on marginal systems

What you can safely do:

• Do not touch panels, DC cables, rooftop isolators or the inverter's DC connectors
• If it clears by itself after the weather dries out, still report it, because repeated alarms point to a developing fault
• Book an electrician or call us. An insulation test needs specialist equipment
• If you see smoke, burn marks or smell burning, keep clear and call 000

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 11)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 12)

What it means: The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

Likely causes:

• High ambient temperature or direct sun on the battery
• Poor ventilation around the battery
• Heavy charge/discharge loads
• An internal battery fault

What you can safely do:

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 13)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 14)

What it means: The inverter and battery (or parts inside the battery) have stopped talking to each other, so the battery may stop charging or discharging.

Likely causes:

• Battery switched off or in a protection state
• Loose or damaged communication cable
• Firmware or settings mismatch

What you can safely do:

• Check the battery's indicator lights and your monitoring app for other alarms
• Don't unplug or re-plug cables yourself
• Call us if it does not clear within a few hours

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 15)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 16)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 17)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 18)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 19)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 20)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 21)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 22)

What it means: The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

Likely causes:

• High ambient temperature or direct sun on the battery
• Poor ventilation around the battery
• Heavy charge/discharge loads
• An internal battery fault

What you can safely do:

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 23)

What it means: The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

Likely causes:

• High ambient temperature or direct sun on the battery
• Poor ventilation around the battery
• Heavy charge/discharge loads
• An internal battery fault

What you can safely do:

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 24)

What it means: The battery is too cold to charge or discharge safely, so it is pausing until it warms up.

Likely causes:

• Cold overnight or winter temperatures where the battery is installed

What you can safely do:

• Wait for the battery to warm up. Most systems recover automatically
• If it happens often, ask us whether the location or a heating feature (where the model has one) should be reviewed

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 25)

What it means: The battery is too cold to charge or discharge safely, so it is pausing until it warms up.

Likely causes:

• Cold overnight or winter temperatures where the battery is installed

What you can safely do:

• Wait for the battery to warm up. Most systems recover automatically
• If it happens often, ask us whether the location or a heating feature (where the model has one) should be reviewed

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 26)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 27)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 28)

What it means: The inverter measured low insulation resistance between the solar/battery DC circuits and earth. In Australia this is treated as an earth fault alarm, and the system must be checked by a licensed electrician.

Likely causes:

• Damaged DC cable insulation (for example from rodents, UV or a pinched cable)
• Water in a DC connector, isolator or junction box
• A damaged solar panel or backsheet
• Heavy dew or rain can trigger it temporarily on marginal systems

What you can safely do:

• Do not touch panels, DC cables, rooftop isolators or the inverter's DC connectors
• If it clears by itself after the weather dries out, still report it, because repeated alarms point to a developing fault
• Book an electrician or call us. An insulation test needs specialist equipment
• If you see smoke, burn marks or smell burning, keep clear and call 000

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 29)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 30)

What it means: The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

Likely causes:

• High ambient temperature or direct sun on the battery
• Poor ventilation around the battery
• Heavy charge/discharge loads
• An internal battery fault

What you can safely do:

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 31)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 32)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 33)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 34)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 35)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 36)

What it means: The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

Likely causes:

• High ambient temperature or direct sun on the battery
• Poor ventilation around the battery
• Heavy charge/discharge loads
• An internal battery fault

What you can safely do:

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 37)

What it means: The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

Likely causes:

• High ambient temperature or direct sun on the battery
• Poor ventilation around the battery
• Heavy charge/discharge loads
• An internal battery fault

What you can safely do:

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 38)

What it means: The inverter and battery (or parts inside the battery) have stopped talking to each other, so the battery may stop charging or discharging.

Likely causes:

• Battery switched off or in a protection state
• Loose or damaged communication cable
• Firmware or settings mismatch

What you can safely do:

• Check the battery's indicator lights and your monitoring app for other alarms
• Don't unplug or re-plug cables yourself
• Call us if it does not clear within a few hours

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 39)

What it means: The inverter and battery (or parts inside the battery) have stopped talking to each other, so the battery may stop charging or discharging.

Likely causes:

• Battery switched off or in a protection state
• Loose or damaged communication cable
• Firmware or settings mismatch

What you can safely do:

• Check the battery's indicator lights and your monitoring app for other alarms
• Don't unplug or re-plug cables yourself
• Call us if it does not clear within a few hours

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 40)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 41)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 42)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 43)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 44)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 45)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 46)

What it means: The battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it.

Likely causes:

• High ambient temperature or direct sun on the battery
• Poor ventilation around the battery
• Heavy charge/discharge loads
• An internal battery fault

What you can safely do:

• Keep clear and do not open or touch the battery
• If you notice smoke, a burning or chemical smell, hissing, swelling or leaking, leave the area, keep others away and call 000
• Otherwise, make sure the space around the battery is clear and shaded, and call us or a licensed electrician to check it

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 47)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 48)

What it means: The battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation.

Likely causes:

• Cell voltage or capacity imbalance
• Over-charge or over-discharge conditions
• Internal battery hardware (relay, sensor, circuit board) fault
• Firmware or configuration mismatch between battery modules

What you can safely do:

• Do not open the battery or touch its terminals
• Note the exact alarm text and time from the app
• Call us. Battery faults should be handled by the installer or manufacturer

Source: GoodWe ESA (ETA/BTA-G20 + Lynx Home D battery) User Manual, AU, V1.0-2026-01-10, section 8.5.2 (8.5.2.2 Battery Fault, list item 49)

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The inverter's arc-fault detection has picked up a pattern that looks like electrical arcing on the DC (solar) side, which can be a fire risk. The inverter shuts down DC power flow as a precaution.

Likely causes:

• Loose or poorly crimped DC connector
• Damaged DC cable
• Water or corrosion in a DC connector or isolator

What you can safely do:

• Do not reset it repeatedly and do not touch DC cables or isolators
• If you see smoke or flames or smell burning, keep clear and call 000
• Call us or a licensed electrician to inspect the DC wiring before the system is restarted

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The internal DC bus voltage of the inverter is too low. GoodWe lists no cause or fix in this guide.

Likely causes:

• Not specified in the guide

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The inverter cannot see a normal mains supply, so it has stopped exporting to the grid (and a hybrid system may switch to backup).

Likely causes:

• Power outage in your street or area
• A tripped or switched-off solar/inverter circuit breaker in the switchboard
• Loose AC connection between the switchboard and the inverter

What you can safely do:

• Check whether the rest of the house (or your neighbours) has power, and check your network operator's outage map
• Check the switchboard for a tripped solar supply main switch or inverter breaker. Only reset it once. If it trips again, leave it off and call an electrician
• Wait. Once normal grid power is back, the inverter normally reconnects by itself after its safety checks (often a few minutes)
• If grid power is normal but the alarm stays, call us

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The inverter measured leakage (residual) current flowing to earth above its safety limit and disconnected. This can indicate damaged insulation somewhere in the system.

Likely causes:

• Damaged DC or AC cable insulation
• Moisture in connectors or equipment
• A one-off disturbance (if it happens once and never again)

What you can safely do:

• Don't touch cabling or equipment
• If it happens repeatedly, or together with an insulation/isolation alarm, call an electrician or us promptly

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The backup/EPS (off-grid) output is overloaded or abnormal, so the system has limited or switched off backup power.

Likely causes:

• Too many or too large appliances on backup circuits during an outage (for example ovens, air conditioners, pumps)
• High start-up surge from motors or compressors
• A short circuit on a backup circuit

What you can safely do:

• Switch off large appliances on backup circuits
• Wait for the system to retry (some models lock out for a period after repeated overloads)
• If it trips with only small loads on, or you suspect a short circuit, call an electrician

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The inverter is running too hot, so it has reduced output or paused to protect itself.

Likely causes:

• High ambient temperature or direct afternoon sun on the inverter
• Blocked air vents or heat sink (dust, cobwebs, stored items)
• A fan problem (on fan-cooled models)

What you can safely do:

• Make sure nothing is stacked against or in front of the inverter, and leave the manufacturer's clearances around it
• Gently clear dust or leaves from the outside of the vents, without opening the unit or spraying water
• Let it cool. It normally resumes by itself
• If it keeps happening on mild days, call us

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: An automatic grid-protection self-test did not pass. GoodWe gives no further detail in this guide.

Likely causes:

• Not specified in the guide

What you can safely do:

• Note the code
• Call us

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

Likely causes:

• Grid disturbance or partial outage (for example one phase lost on a 3-phase supply)
• Supply problems on the network side
• Wiring or phase-order errors at installation (if it shows up from day one)

What you can safely do:

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The DC voltage coming from the solar panels is higher than the inverter is rated for. Over-voltage can damage the inverter.

Likely causes:

• Too many panels wired in series in a string (system design/installation issue)
• Very cold, bright mornings raise panel voltage
• Incorrect panel or string configuration after a change to the system

What you can safely do:

• Do not touch the DC isolator or cables unless the manufacturer's owner shutdown tells you to
• Call us. The string design needs to be checked by a licensed installer

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The battery licence/activation code entered for the inverter is incorrect, so battery functions are blocked.

Likely causes:

• Wrong battery activation code entered during setup

What you can safely do:

• Call us to re-enter the correct activation code

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The inverter saw something abnormal about the grid supply (for example phase loss, imbalance, waveform distortion or loss of mains), so it disconnected as a safety measure.

Likely causes:

• Grid disturbance or partial outage (for example one phase lost on a 3-phase supply)
• Supply problems on the network side
• Wiring or phase-order errors at installation (if it shows up from day one)

What you can safely do:

• Check whether you have a partial power outage (some circuits or phases off)
• Wait for automatic reconnection after the grid returns to normal
• If it persists or started after electrical work, call us

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The inverter detected too much DC current in its AC output, which the grid standards don't allow, so it disconnected.

Likely causes:

• A one-off disturbance (if it is occasional)
• Internal measuring or power stage problem (if it repeats)

What you can safely do:

• If it happened once and the system recovered, keep an eye on it
• If it repeats, call us

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The DC voltage coming from the solar panels is higher than the inverter is rated for. Over-voltage can damage the inverter.

Likely causes:

• Too many panels wired in series in a string (system design/installation issue)
• Very cold, bright mornings raise panel voltage
• Incorrect panel or string configuration after a change to the system

What you can safely do:

• Do not touch the DC isolator or cables unless the manufacturer's owner shutdown tells you to
• Call us. The string design needs to be checked by a licensed installer

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The inverter measured low insulation resistance between the solar/battery DC circuits and earth. In Australia this is treated as an earth fault alarm, and the system must be checked by a licensed electrician.

Likely causes:

• Damaged DC cable insulation (for example from rodents, UV or a pinched cable)
• Water in a DC connector, isolator or junction box
• A damaged solar panel or backsheet
• Heavy dew or rain can trigger it temporarily on marginal systems

What you can safely do:

• Do not touch panels, DC cables, rooftop isolators or the inverter's DC connectors
• If it clears by itself after the weather dries out, still report it, because repeated alarms point to a developing fault
• Book an electrician or call us. An insulation test needs specialist equipment
• If you see smoke, burn marks or smell burning, keep clear and call 000

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3

What it means: The equipment's self-checks found an internal problem (for example relays, measuring circuits, internal communication or power electronics). Some of these clear by themselves after a one-off event, but repeated alarms usually need a technician.

Likely causes:

• A one-off disturbance (for example a grid event)
• Internal component or circuit board fault
• Firmware issue

What you can safely do:

• Note the code, time and whether it clears by itself
• If your installer showed you the owner shutdown/restart procedure from the manufacturer's manual (summarised at the top of this page), you may restart the system once. Do not open covers or touch cabling.
• If the code returns or the system stays offline, call us. Internal faults are a warranty/technician job

Source: GoodWe Troubleshooting Guide, Hybrid ET/ET PLUS+/EH/ESA/ES/EM/EHB/ES G2 & AC-coupled BT/BH/BP/SBP, V1.0-2023-03-10, section 4.3