SolaX X1-Hybrid G4 single-phase hybrid error codes explained

What 69 SolaX X1-Hybrid G4 single-phase hybrid inverter 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.

Guide only. This information is a general guide taken from manufacturer documentation. All electrical work must be performed by a licensed electrician. Never open your inverter, battery or switchboard. If you see smoke, smell burning or see damage, keep clear and call 000.

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Sources

Meanings are summarised from these manufacturer documents. Check your own model's manual, as codes vary between models and firmware versions.

SolaX X1-Hybrid G4 User Manual (320101081103), Troubleshooting

SolaX is a trademark of its owner. Total Solar is not affiliated with the manufacturer unless stated. All fault code guides

Code	Message & meaning	Model	Type
IE 01Fault	TZ Protect Fault Overcurrent fault What you can do Note the code, date and time and check the monitoring app Restart the system once using the owner shutdown/start-up steps in your manual if it allows If it comes back, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 02Info	Grid Lost Fault Grid lost fault What you can do Check whether the rest of your house or street has power, and check your network operator's outage map Check the switchboard for a tripped solar/inverter breaker - reset it once only; if it trips again, leave it off and call an electrician Once normal power is back the inverter usually reconnects on its own within a few minutes If the power is normal but the alarm stays, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 03Warning	Grid Volt Fault Power grid voltage overrun What you can do This is usually caused by the mains supply, not the solar system The inverter normally reconnects by itself once grid voltage is back in range If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 04Warning	Grid Freq Fault Grid overfrequency What you can do This is caused by the mains frequency moving outside the allowed range, usually briefly The inverter reconnects by itself once the grid is stable If it keeps happening, note the times and call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 05Fault	PV Volt Fault PV overvoltage What you can do Do not touch the DC isolators or cables Note the time - this often shows on cold, very sunny mornings Call your installer - the panel strings may need to be checked against the inverter's limits X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 06Fault	Bus Volt Fault Press the ESC key to restart the inverter. What you can do Note the code, then restart the system once using the owner shutdown/start-up steps in your manual If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 07Fault	Bat Volt Fault Battery voltage fault What you can do Note the code and the battery state of charge shown in the app Let the system run - some battery voltage protections clear by themselves after charging or discharging If the alarm stays or keeps returning, call your installer - don't open or disconnect the battery yourself X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 08Warning	AC10mins Volt Grid voltage out of range in the last 10 minutes What you can do This is usually caused by the mains supply, not the solar system The inverter normally reconnects by itself once grid voltage is back in range If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 09Fault	DCI OCP Fault DCI overcurrent protection fault What you can do Restart the system once using the owner shutdown/start-up steps in your manual If it comes back, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 10Warning	DCV OVP Fault DCV EPS (Off-grid) overvoltage protection fault What you can do This is usually caused by the mains supply, not the solar system The inverter normally reconnects by itself once grid voltage is back in range If it happens often (especially on sunny afternoons), note the times and call your installer - they can check the voltage and settings and talk to the network if needed X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 11Warning	SW OCP Fault Software detection of overcurrent fault What you can do Make sure the system is online so it can receive updates Restart the system once using the owner steps in your manual If the alarm stays, call your installer - settings and firmware must be fixed by them or the manufacturer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 12Fault	RC OCP Fault Overcurrent protection fault What you can do Note the code, date and time and check the monitoring app Restart the system once using the owner shutdown/start-up steps in your manual if it allows If it comes back, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 13Safety-Critical	Isolation Fault Insulation fault What you can do Do not touch the panels, rooftop isolators or DC cables Note the code and whether it appears in wet weather or early morning - this helps the electrician If it clears by itself once things dry out, still let us know if it keeps returning Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 14Warning	Temp Over Fault Temperature out of range What you can do Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents It usually recovers once it cools down If it repeats often or you can hear a noisy/failed fan, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 15Fault	Bat Con Dir Fault Battery direction fault What you can do Check the battery status and any extra alarms in the app Restart the system once using the owner shutdown/start-up steps in your manual if it allows If the alarm comes back, or the battery is hot, swollen, noisy or smells, keep clear and call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 16Warning	EPS Overload Fault EPS (Off-grid) overload fault What you can do Turn off some large appliances (air-conditioners, ovens, kettles, pool pumps) - backup outputs have a power limit The system usually recovers by itself once the load drops If it keeps happening with normal loads, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 17Warning	Overload Fault On-grid mode overload fault What you can do Turn off some large appliances (air-conditioners, ovens, kettles, pool pumps) - backup outputs have a power limit The system usually recovers by itself once the load drops If it keeps happening with normal loads, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 18Info	BatPowerLow Bat power low What you can do This normally means the battery is low or has reached its reserve level Let the system recharge from solar or the grid - check the state of charge in the app If the battery never charges or stays at 0% for more than a day of sunshine, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 19Fault	BMS Lost Battery communication lost What you can do Check the app - the battery may show as offline or with no state of charge Restart the system once using the shutdown and start-up steps in your owner's manual (battery last off, first on, unless your manual says otherwise) If the alarm comes back, call your installer - battery communication cables must be checked by them X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 20Warning	Fan Fault Fan fault What you can do Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents It usually recovers once it cools down If it repeats often or you can hear a noisy/failed fan, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 21Warning	Low TempFault Low temperature fault What you can do Check from a safe distance that the inverter is shaded, has clear space around it and that nothing is blocking the vents It usually recovers once it cools down If it repeats often or you can hear a noisy/failed fan, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 22Warning	ARM unmatched ARM software version mismatch fault What you can do Make sure the system is online so it can receive updates Restart the system once using the owner steps in your manual If the alarm stays, call your installer - settings and firmware must be fixed by them or the manufacturer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 23Fault	Other Device Fault Other Device Fault What you can do Note the code, then restart the system once using the owner shutdown/start-up steps in your manual If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 25Warning	InterCommsFault Internal communication fault What you can do Check that your home Wi-Fi/internet is working and restart your router Wait an hour - monitoring often reconnects by itself If the inverter screen also shows a fault, or the alarm stays for more than a day, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 26Fault	INV EEPROM Inverter EEPROM fault What you can do Note the code, then restart the system once using the owner shutdown/start-up steps in your manual If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 27Safety-Critical	RCD Fault Residual current device fault What you can do Keep clear and do not touch the inverter or cabling Note the code, date and time Call a licensed electrician or Total Solar - this alarm means current may be leaking to earth X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 28Fault	Grid Relay Fault Electrical relay fault What you can do Note the code, then restart the system once using the owner shutdown/start-up steps in your manual If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 29Warning	EPS Relay Fault EPS (Off-grid) relay fault What you can do Turn off some large appliances (air-conditioners, ovens, kettles, pool pumps) - backup outputs have a power limit The system usually recovers by itself once the load drops If it keeps happening with normal loads, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 30Fault	PV ConnDirFault PV direction fault What you can do Check solar generation in the app compared with similar days Do not touch the DC isolators, cables or connectors, and don't go on the roof If it doesn't clear by itself, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 31Fault	ChargeRelayFault Charge relay fault What you can do Note the code, then restart the system once using the owner shutdown/start-up steps in your manual If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 32Safety-Critical	EarthRelayFault EPS earth relay fault What you can do Do not touch the panels, rooftop isolators or DC cables Note the code and whether it appears in wet weather or early morning - this helps the electrician If it clears by itself once things dry out, still let us know if it keeps returning Call a licensed electrician or Total Solar - insulation and earth faults need testing with proper equipment X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 101Fault	PowerTypeFault Power type fault What you can do Note the code, date and time and check the monitoring app Restart the system once using the owner shutdown/start-up steps in your manual if it allows If it comes back, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 102Warning	Port OC Warning EPS (Off-grid) port overcurrent fault What you can do Turn off some large appliances (air-conditioners, ovens, kettles, pool pumps) - backup outputs have a power limit The system usually recovers by itself once the load drops If it keeps happening with normal loads, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 103Fault	Mgr EEPROM Fault Manager EEPROM fault What you can do Note the code, then restart the system once using the owner shutdown/start-up steps in your manual If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 104Warning	DSPunmatched DSP veision error What you can do Make sure the system is online so it can receive updates Restart the system once using the owner steps in your manual If the alarm stays, call your installer - settings and firmware must be fixed by them or the manufacturer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 105Fault	NTC Sample Invalid NTC invalid What you can do Note the code, date and time and check the monitoring app Restart the system once using the owner shutdown/start-up steps in your manual if it allows If it comes back, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 106Safety-Critical	Bat Temp Low Battery temperature low What you can do Check from a safe distance for heat, swelling, hissing, a burning smell or smoke - if you notice any, keep everyone away and call 000 If nothing looks wrong, make sure the battery area is shaded and ventilated and nothing is stacked against it Let the battery cool; most units recover by themselves If the alarm keeps returning, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 107Safety-Critical	Bat Temp High Battery temperature high What you can do Check from a safe distance for heat, swelling, hissing, a burning smell or smoke - if you notice any, keep everyone away and call 000 If nothing looks wrong, make sure the battery area is shaded and ventilated and nothing is stacked against it Let the battery cool; most units recover by themselves If the alarm keeps returning, call your installer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 109Warning	Meter Fault Meter fault What you can do Check the monitoring app for the alarm and whether export/consumption readings look wrong Restart your home router if the meter talks over Wi-Fi or LAN Call your installer - meter and CT wiring is inside the switchboard and must be checked by a licensed electrician X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter
IE 110Fault	BypassRelayFlt Bypass relay fault What you can do Note the code, then restart the system once using the owner shutdown/start-up steps in your manual If the code comes back, call your installer - this is an internal fault that needs a licensed electrician or the manufacturer X1-Hybrid G4 single-phase hybrid · Guide only. All work must be done by a licensed electrician.	X1-Hybrid G4 single-phase hybrid	Inverter

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