Question 1

What does error code Grid Volt Fault / ID 2032 u Solax / Huawei / Growatt mean and how to fix it?

Accepted Answer

Utility grid voltage outside permitted range (phase overvoltage above 253 V). Troubleshooting & fix: During midday peak solar production, grid voltage exceeds the EN 50549 limit; switch on household loads (water heater/EV charger), tighten distribution board terminals, and enable P(U) / Q(U) regulation.

Question 2

What does error code Isolation Fault / IE03 / ID 2062 u Solax / Huawei / Growatt mean and how to fix it?

Accepted Answer

Low PV array insulation resistance to ground (below 100 kΩ). Troubleshooting & fix: Moisture or water ingress inside a leaky rooftop MC4 connector, solar DC cable insulation chafed against roof tiles/rails, or a shorted Type 1+2 DC surge arrester (SPD).

Question 3

What does error code BMS Lost / ID 2068 (Battery) u Solax / Huawei / Growatt mean and how to fix it?

Accepted Answer

Loss of BMS communication between inverter and battery bank (Triple Power / Luna2000 / ARK). Troubleshooting & fix: Check that the RJ45 (CAN/RS485) communication cable is firmly clicked in, verify the battery breaker is ON, and trigger a grid forced charge if deeply discharged in winter.

Question 4

What does error code Ground I Fault / ID 2061 u Solax / Huawei / Growatt mean and how to fix it?

Accepted Answer

High residual ground leakage current – internal RCMU protection triggered. Troubleshooting & fix: Damaged PV string insulation during rain or an improperly wired AC residual current device (RCD Type A instead of Type B) on the inverter output.

Question 5

What does error code Fan Fault / Over Temp (ID 2080) u Solax / Huawei / Growatt mean and how to fix it?

Accepted Answer

Cooling fan fault or inverter overheating at peak output power. Troubleshooting & fix: Blow dust and cobwebs out of the heatsink fins and bottom inverter fans using compressed air; if a fan bearing is seized, replace the snap-in fan tray module.

Solax, Huawei & Growatt Inverter Errors: Grid Volt Fault, Isolation, BMS Lost – Error Code Meaning, Troubleshooting & Repair

Error Code Reference Table for Solax / Huawei / Growatt and step-by-step repair procedure:

Error Code	Meaning / Fault Symptom	Most Common Cause & Repair Procedure
Grid Volt Fault / ID 2032	Utility grid voltage outside permitted range (phase overvoltage above 253 V)	During midday peak solar production, grid voltage exceeds the EN 50549 limit; switch on household loads (water heater/EV charger), tighten distribution board terminals, and enable P(U) / Q(U) regulation.
Isolation Fault / IE03 / ID 2062	Low PV array insulation resistance to ground (below 100 kΩ)	Moisture or water ingress inside a leaky rooftop MC4 connector, solar DC cable insulation chafed against roof tiles/rails, or a shorted Type 1+2 DC surge arrester (SPD).
BMS Lost / ID 2068 (Battery)	Loss of BMS communication between inverter and battery bank (Triple Power / Luna2000 / ARK)	Check that the RJ45 (CAN/RS485) communication cable is firmly clicked in, verify the battery breaker is ON, and trigger a grid forced charge if deeply discharged in winter.
Ground I Fault / ID 2061	High residual ground leakage current – internal RCMU protection triggered	Damaged PV string insulation during rain or an improperly wired AC residual current device (RCD Type A instead of Type B) on the inverter output.
Fan Fault / Over Temp (ID 2080)	Cooling fan fault or inverter overheating at peak output power	Blow dust and cobwebs out of the heatsink fins and bottom inverter fans using compressed air; if a fan bearing is seized, replace the snap-in fan tray module.