GoodWe Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) error codes explained
What 49 GoodWe Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) inverter & battery fault and error codes mean, in plain English, with safe checks you can do and when to call a licensed electrician.
Safety first: never open the switchboard, remove covers, or pull apart or disconnect the inverter, batteries, isolators or wiring. Only use the switches and buttons described here. Anything else must be done by a licensed electrician. Call 1300 209 503 or book a service request.
| Code | Message & meaning |
|---|---|
| BMS #1Warning |
Total voltage is too high warningThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #2Warning |
Total voltage is too low warningThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #3Warning |
Cell voltage is too high warningThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #4Warning |
Cell voltage is too low warningThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #5Critical |
Charging temperature is too high warningThe battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #6Critical |
Discharging temperature is too high warningThe battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #7Warning |
Charging temperature is too low warningThe battery is too cold to charge or discharge safely, so it is pausing until it warms up. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #8Warning |
Discharging temperature is too low warningThe battery is too cold to charge or discharge safely, so it is pausing until it warms up. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #9Warning |
Charge overcurrent warningThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #10Warning |
Discharge overcurrent warningThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #11Critical |
Insulation resistance is too low warningThe 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. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #12Warning |
Cell excessive temperature differentials warningThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #13Critical |
Post temperature is too high warningThe battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #14Warning |
Cell excessive voltage differentials warningThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #15Warning |
PCS communication loss warningThe inverter and battery (or parts inside the battery) have stopped talking to each other, so the battery may stop charging or discharging. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #16Warning |
DCDC warningThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #17Warning |
Heat film MOS adhesion warningThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #18Warning |
Heat film MOS open warningThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #19Fault |
Total voltage is too high faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #20Fault |
Total voltage is too low faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #21Fault |
Cell voltage is too high faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #22Fault |
Cell voltage is too low faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #23Critical |
Charging temperature is too high faultThe battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #24Critical |
Discharging temperature is too high faultThe battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #25Warning |
Charging temperature is too low faultThe battery is too cold to charge or discharge safely, so it is pausing until it warms up. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #26Warning |
Discharging temperature is too low faultThe battery is too cold to charge or discharge safely, so it is pausing until it warms up. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #27Fault |
Charge overcurrent faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #28Fault |
Discharge overcurrent faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #29Critical |
Insulation resistance is too low faultThe 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. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #30Fault |
Cell excessive temperature differentials faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #31Critical |
Post temperature is too high faultThe battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #32Fault |
Cell excessive voltage differentials faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #33Fault |
Relay or MOS short-circuit faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #34Fault |
Relay or MOS open-circuit faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #35Fault |
The precharge failed faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #36Fault |
Acquisition line faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #37Critical |
Relay or MOS temperature is too high faultThe battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #38Critical |
Diverter temperature is too high faultThe battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #39Fault |
Slave MCU communication faultThe inverter and battery (or parts inside the battery) have stopped talking to each other, so the battery may stop charging or discharging. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #40Fault |
BMU communication faultThe inverter and battery (or parts inside the battery) have stopped talking to each other, so the battery may stop charging or discharging. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #41Fault |
Micro-electronics faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #42Fault |
Hardware overcurrent faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #43Fault |
Application software faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #44Fault |
Parallel RACK faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #45Fault |
DCDC faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #46Fault |
Inconsistent cell faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #47Critical |
The output port over temperature faultThe battery (or one of its internal parts) is above its safe temperature, so charging or discharging is limited or stopped to protect it. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #48Fault |
SOH too low faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
| BMS #49Fault |
Heating film MOS Three-terminal faultThe battery management system has reported a problem with battery voltage, current, cells or internal hardware and has limited or stopped battery operation. What you can do
Lynx Home D battery incl. GW8.3-BAT-D-G21 (BMS alarms) · Guide only. All work must be done by a licensed electrician. |
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Or call 1300 209 503
Sources
Meanings are summarised from these manufacturer documents. Check your own model's manual, as codes vary between models and firmware versions.
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
- 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)
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