Where do these GoodWe fault codes come from?

Compiled from publicly available GoodWe inverter and battery documentation and field references, then rewritten for the trade. Wattbench is independent and not affiliated with GoodWe.

Which of these can I clear on site?

Some clear on their own once grid or environmental conditions return to normal. Anything involving DC isolation, AC switching, wiring or opening the unit is licensed electrical work. Isolate safely, follow AS/NZS 5033 and AS/NZS 3000 procedure and use appropriate PPE before touching a live system.

The exact code isn't listed. Why not?

Firmware and model variants differ, and manufacturers revise their code tables. We document the most common ones; for a variant that isn't here, check the unit's current manual or the manufacturer's service portal.

How current is this reference?

This reference was last reviewed on 2 August 2026. We revise entries when the underlying manufacturer documentation changes.

Inverter Fault Library

GoodWe Error Codes

GoodWe inverter error codes for grid, isolation, temperature and internal faults, with clear guidance on self-recovery versus service.

Sources listedReviewed August 2026Source: GoodWe docs & field referencesOur methodology

Manufacturer: GoodWe
Codes documented: 20
Source: GoodWe docs & field references
Scope: Reference only

20 of 20 codes

About this fault librarySources · scope

A reference compiled by Wattbench from GoodWe documentation and field sources. GoodWe shows faults as a numbered error code and/or a named fault depending on the model. On an LCD unit, short-press the front button and scroll to “Error”/“Fault”; on ET/EH/EHB hybrid units, check Alarms in the SolarGo app or the SEMS portal. Where a fault has both a number and a name, we list them together, and both are searchable. Safety note: earth, insulation and PV over-voltage faults need a licensed worker. An owner should record the alarm and keep clear of isolators, wiring and connectors while the responsible installer follows the exact product procedure.

Key takeaways

20 GoodWe fault and alarm codes, documented for the trade.
Compiled from published documentation and field references; Wattbench is independent and not affiliated with GoodWe.
Codes involving DC/AC isolation, wiring or opening the unit are licensed electrical work. Isolate safely and follow AS/NZS procedure.

Resolution text is manufacturer/service context, not permission for an owner to perform electrical work. Stop at visible observations unless the exact product instructions identify an owner control. Isolation, configuration, testing, opening equipment and wiring are for an appropriately licensed worker and, where required, an SAA-accredited person. Where a card says Product fit is unknown, treat it as brand-level guidance and confirm the exact model, role, regional variant, firmware and current manual before acting.

1
SPI failure
An internal communication (SPI bus) failure inside the inverter.
Product fit · Confirmed · ETC Series
Show field stepsHide field steps for 1: SPI failure
Product fit
- ETC Series · Hybrid inverter
  Confirmed · Manual V1.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Record the exact code, inverter model and time. Do not operate isolators or open the inverter; contact your installer or GoodWe if the code remains.
Installer remedy
Follow the controlled shutdown and restart sequence for the exact model. If the fault returns, preserve the code and escalate to GoodWe after-sales rather than repeatedly resetting it.
Remedy sourceETC manual V1.1
Manufacturer / escalation handoff
2
EEPROM R/W failure
A read/write failure on the inverter's memory chip.
Product fit · Confirmed · ETC Series
Show field stepsHide field steps for 2: EEPROM R/W failure
Product fit
- ETC Series · Hybrid inverter
  Confirmed · Manual V1.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Record the exact code, inverter model and time. Do not operate isolators or open the inverter; contact your installer or GoodWe if the code remains.
Installer remedy
Follow the controlled shutdown and restart sequence for the exact model. If the fault returns, preserve the code and escalate to GoodWe after-sales rather than repeatedly resetting it.
Remedy sourceETC manual V1.1
Manufacturer / escalation handoff
3 · Fac Failure
Grid frequency fault
The grid frequency is outside the inverter's permissible range.
Product fit · Confirmed · ET Series / ET Plus Series
Show field stepsHide field steps for 3 · Fac Failure: Grid frequency fault
Product fit
- ET Series / ET Plus Series · Three-phase hybrid inverter
  Confirmed · Manual V1.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Note when the alarm occurs and whether the property supply appears normal. It should clear when grid frequency returns to range; contact your installer if it persists or repeats.
Installer remedy
Check the displayed and measured grid frequency against the approved operating settings. Preserve the configured country/protection profile and escalate persistent supply abnormalities through the authorised network process.
Remedy sourceGoodWe FAQ ET manual
Manufacturer / escalation handoff
7 · 25
Relay check failure
The inverter's grid relay failed its self-check.
Product fit · Confirmed · ETC Series
Show field stepsHide field steps for 7 · 25: Relay check failure
Product fit
- ETC Series · Hybrid inverter
  Confirmed · Manual V1.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Record the exact code, inverter model and time. Do not operate isolators or open the inverter; contact your installer or GoodWe if the code remains.
Installer remedy
Check the AC neutral-to-earth condition under the model-specific procedure, then perform one controlled restart. A recurring relay check failure requires GoodWe service assessment.
Remedy sourceETC manual V1.1
Manufacturer / escalation handoff
12
LCD communication failure
A communication error between the LCD/display and the master DSP.
Product fit · Confirmed · ETC Series
Show field stepsHide field steps for 12: LCD communication failure
Product fit
- ETC Series · Hybrid inverter
  Confirmed · Manual V1.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Record the exact code, inverter model and time. Do not operate isolators or open the inverter; contact your installer or GoodWe if the code remains.
Installer remedy
Follow the controlled shutdown and restart sequence for the exact model. If the fault returns, preserve the code and escalate to GoodWe after-sales rather than repeatedly resetting it.
Remedy sourceETC manual V1.1
Manufacturer / escalation handoff
13
DC injection high
The DC component of the AC output current exceeds the inverter's limit.
Product fit · Confirmed · ETC Series
Show field stepsHide field steps for 13: DC injection high
Product fit
- ETC Series · Hybrid inverter
  Confirmed · Manual V1.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Record the exact code, inverter model and time. Do not operate isolators or open the inverter; contact your installer or GoodWe if the code remains.
Installer remedy
Perform one controlled restart under the exact product procedure. If the DC-injection fault returns, stop resetting and escalate immediately to GoodWe after-sales.
Remedy sourceETC manual V1.1
Manufacturer / escalation handoff
14 · Isolation Fail
Isolation failure
Insulation resistance between the PV array and ground is too low, most common in rain or high humidity.
Product fit · Confirmed · ET Series / ET Plus Series
Show field stepsHide field steps for 14 · Isolation Fail: Isolation failure
Product fit
- ET Series / ET Plus Series · Three-phase hybrid inverter
  Confirmed · Manual V1.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Record the code, time and weather conditions. Do not reset the inverter, touch PV connectors or operate isolators; arrange a licensed inspection if it persists or returns.
Installer remedy
Test the PV insulation resistance to earth using the exact model limits and safe-isolation procedure. Inspect the affected string wiring, connectors, earthing and moisture exposure before returning the system to service.
Remedy sourceGoodWe FAQ ET manual
Manufacturer / escalation handoff
15 · Vac Failure
Grid voltage fault
The grid voltage is outside the acceptable range for the inverter.
Product fit · Confirmed · ET Series / ET Plus Series
Show field stepsHide field steps for 15 · Vac Failure: Grid voltage fault
Product fit
- ET Series / ET Plus Series · Three-phase hybrid inverter
  Confirmed · Manual V1.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Note when the alarm occurs and whether other equipment has lost supply. The inverter should reconnect when grid voltage returns to range; contact your installer if it persists or repeats.
Installer remedy
Measure the inverter AC supply, verify wiring and the approved country/protection profile, and retain the settings as found. Escalate a confirmed supply-voltage issue through the authorised network process.
Remedy sourceGoodWe FAQ ET manual
Manufacturer / escalation handoff
16
External fan failure
The external cooling fan has faulted.
Product fit · Confirmed · ET G2 6–15 kW
Show field stepsHide field steps for 16: External fan failure
Product fit
- ET G2 6–15 kW · Three-phase hybrid inverter
  Confirmed · Manual V2.1 · AU/region not confirmed · Firmware not documented
Safe checks now
From a safe position, check that the inverter's external airflow is not visibly obstructed. Do not touch the fan or open the unit; contact your installer if the alarm remains.
Installer remedy
Inspect the external fan and ventilation path under the product maintenance procedure. Replace a failed fan through the authorised service process.
Remedy sourceET G2 manual V2.1
Manufacturer / escalation handoff
17 · PV Over Voltage
PV over-voltage
The PV array voltage exceeds the inverter's maximum input.
Product fit · Confirmed · ET Series / ET Plus Series
Show field stepsHide field steps for 17 · PV Over Voltage: PV over-voltage
Product fit
- ET Series / ET Plus Series · Three-phase hybrid inverter
  Confirmed · Manual V1.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Leave the inverter and PV wiring alone, record the code and contact your installer promptly. Do not reset the inverter or operate isolators to test whether it clears.
Installer remedy
Measure each string's open-circuit voltage under the approved procedure and compare it with the exact inverter input limit and temperature-corrected design. Correct the string design before reconnection.
Remedy sourceGoodWe FAQ ET manual
Manufacturer / escalation handoff
19 · Over Temperature
Over temperature
The inverter's operating temperature has exceeded its safe limit.
Product fit · Confirmed · ET G2 6–15 kW
Show field stepsHide field steps for 19 · Over Temperature: Over temperature
Product fit
- ET G2 6–15 kW · Three-phase hybrid inverter
  Confirmed · Manual V2.1 · AU/region not confirmed · Firmware not documented
Safe checks now
From a safe position, keep the area around the inverter clear and note whether it is in direct sun or unusually hot. Do not open the unit; contact your installer if it does not recover after cooling.
Installer remedy
Check the installation ventilation, ambient conditions and fan operation against the model manual. Rectify the cooling condition or arrange service if the environment is normal and the fault persists.
Remedy sourceET G2 manual V2.1
Manufacturer / escalation handoff
20
Internal fan fault
An internal cooling-fan fault (IFAN).
Product fit · Confirmed · ET G2 6–15 kW
Show field stepsHide field steps for 20: Internal fan fault
Product fit
- ET G2 6–15 kW · Three-phase hybrid inverter
  Confirmed · Manual V2.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Record the exact code, inverter model and time. Do not operate isolators or open the inverter; contact your installer or GoodWe if the code remains.
Installer remedy
Confirm ventilation and ambient conditions, then inspect fan operation under the authorised service procedure. An internal fan fault that remains requires service; do not leave the enclosure open in operation.
Remedy sourceET G2 manual V2.1
Manufacturer / escalation handoff
21
DC bus high
The internal DC bus voltage is too high.
Product fit · Confirmed · ETC Series
Show field stepsHide field steps for 21: DC bus high
Product fit
- ETC Series · Hybrid inverter
  Confirmed · Manual V1.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Record the exact code, inverter model and time. Do not operate isolators or open the inverter; contact your installer or GoodWe if the code remains.
Installer remedy
Follow the controlled shutdown and restart sequence for the exact model. If the fault returns, preserve the code and escalate to GoodWe after-sales rather than repeatedly resetting it.
Remedy sourceETC manual V1.1
Manufacturer / escalation handoff
22 · Ground I Fail
Ground (residual) current failure
Residual-current (earth-leakage) protection has tripped. Current is leaking to ground.
Product fit · Confirmed · ETC Series
Show field stepsHide field steps for 22 · Ground I Fail: Ground (residual) current failure
Product fit
- ETC Series · Hybrid inverter
  Confirmed · Manual V1.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Record the code, time and weather conditions. Do not reset the inverter or touch system wiring; arrange a licensed inspection if the alarm persists or returns.
Installer remedy
Test the PV strings and AC earthing/neutral conditions under the exact product procedure. Locate damaged insulation, moisture ingress or an abnormal earth path before returning the system to service.
Remedy sourceGoodWe FAQ ETC manual V1.1
Manufacturer / escalation handoff
23 · Utility Loss
Utility (grid) loss
Loss of connection between the inverter and the utility grid, an outage or a disconnection.
Product fit · Confirmed · ET Series / ET Plus Series
Show field stepsHide field steps for 23 · Utility Loss: Utility (grid) loss
Product fit
- ET Series / ET Plus Series · Three-phase hybrid inverter
  Confirmed · Manual V1.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Check whether the property and neighbourhood have grid supply, then record the code and time. Do not operate solar isolators; contact your installer if normal grid supply is present but the alarm remains.
Installer remedy
Verify AC supply at the inverter, protective-device state and AC wiring under the approved procedure. If supply and wiring are sound, follow the model troubleshooting path and escalate to GoodWe.
Remedy sourceGoodWe FAQ ET manual
Manufacturer / escalation handoff
24 · 31
AC HCT (current sensor) failure
The AC current sensor (HCT) has failed.
Product fit · Confirmed · ET G2 6–15 kW
Show field stepsHide field steps for 24 · 31: AC HCT (current sensor) failure
Product fit
- ET G2 6–15 kW · Three-phase hybrid inverter
  Confirmed · Manual V2.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Record the exact code, inverter model and time. Do not operate isolators or open the inverter; contact your installer or GoodWe if the code remains.
Installer remedy
Perform one controlled shutdown and restart under the exact model procedure. If the AC current-sensor fault persists, arrange GoodWe service rather than attempting an internal repair.
Remedy sourceET G2 manual V2.1
Manufacturer / escalation handoff
26 · 32
GFCI failure
A failure in the leakage-current (GFCI) detection circuit.
Product fit · Confirmed · ET G2 6–15 kW
Show field stepsHide field steps for 26 · 32: GFCI failure
Product fit
- ET G2 6–15 kW · Three-phase hybrid inverter
  Confirmed · Manual V2.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Record the exact code, inverter model and time. Do not operate isolators or open the inverter; contact your installer or GoodWe if the code remains.
Installer remedy
Perform one controlled shutdown and restart under the exact model procedure. A persistent GFCI sensing fault requires prompt service because the leakage-current detection circuit cannot be relied upon.
Remedy sourceET G2 manual V2.1
Manufacturer / escalation handoff
30
Reference 1.5 V failure
The internal 1.5 V reference voltage is out of range.
Product fit · Confirmed · ETC Series
Show field stepsHide field steps for 30: Reference 1.5 V failure
Product fit
- ETC Series · Hybrid inverter
  Confirmed · Manual V1.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Record the exact code, inverter model and time. Do not operate isolators or open the inverter; contact your installer or GoodWe if the code remains.
Installer remedy
Follow the controlled shutdown and restart sequence for the exact model. If the fault returns, preserve the code and escalate to GoodWe after-sales rather than repeatedly resetting it.
Remedy sourceETC manual V1.1
Manufacturer / escalation handoff
PE Loss
Protective earth (PE) loss
A missing or faulty protective-earth connection, possibly loose wiring, corrosion, or grounding-system damage.
Product fit · Confirmed · ET Series / ET Plus Series
Show field stepsHide field steps for PE Loss: Protective earth (PE) loss
Product fit
- ET Series / ET Plus Series · Three-phase hybrid inverter
  Confirmed · Manual V1.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Do not reset the inverter or touch electrical equipment. Record the code and arrange a licensed electrician or your installer to attend.
Installer remedy
Verify the protective-earth connection and continuity under the approved safe-isolation procedure. Rectify the earthing fault before the inverter is returned to service.
Remedy sourceGoodWe FAQ ET manual
Manufacturer / escalation handoff
Device Failure
Internal device failure
A general internal device failure (shown for faults outside the listed codes).
Product fit · Confirmed · ET G2 6–15 kW
Show field stepsHide field steps for Device Failure: Internal device failure
Product fit
- ET G2 6–15 kW · Three-phase hybrid inverter
  Confirmed · Manual V2.1 · AU/region not confirmed · Firmware not documented
Safe checks now
Record the exact code, inverter model and time. Do not operate isolators or open the inverter; contact your installer or GoodWe if the code remains.
Installer remedy
Follow the controlled shutdown and restart sequence for the exact model. If the fault returns, preserve the code and escalate to GoodWe after-sales rather than repeatedly resetting it.
Remedy sourceET G2 manual V2.1
Manufacturer / escalation handoff

Sources

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Good to know

Frequently asked

Where do these GoodWe fault codes come from?: Compiled from publicly available GoodWe inverter and battery documentation and field references, then rewritten for the trade. Wattbench is independent and not affiliated with GoodWe.
Which of these can I clear on site?: Some clear on their own once grid or environmental conditions return to normal. Anything involving DC isolation, AC switching, wiring or opening the unit is licensed electrical work. Isolate safely, follow AS/NZS 5033 and AS/NZS 3000 procedure and use appropriate PPE before touching a live system.
The exact code isn't listed. Why not?: Firmware and model variants differ, and manufacturers revise their code tables. We document the most common ones; for a variant that isn't here, check the unit's current manual or the manufacturer's service portal.
How current is this reference?: This reference was last reviewed on 2 August 2026. We revise entries when the underlying manufacturer documentation changes.

Keep exploring

Other fault libraries

Inverter Fault Library

SPI failure

Product fit

Safe checks now

Installer remedy

EEPROM R/W failure

Product fit

Safe checks now

Installer remedy

Grid frequency fault

Product fit

Safe checks now

Installer remedy

Relay check failure

Product fit

Safe checks now

Installer remedy

LCD communication failure

Product fit

Safe checks now

Installer remedy

DC injection high

Product fit

Safe checks now

Installer remedy

Isolation failure

Product fit

Safe checks now

Installer remedy

Grid voltage fault

Product fit

Safe checks now

Installer remedy

External fan failure

Product fit

Safe checks now

Installer remedy

PV over-voltage

Product fit

Safe checks now

Installer remedy

Over temperature

Product fit

Safe checks now

Installer remedy

Internal fan fault

Product fit

Safe checks now

Installer remedy

DC bus high

Product fit

Safe checks now

Installer remedy

Ground (residual) current failure

Product fit

Safe checks now

Installer remedy

Utility (grid) loss

Product fit

Safe checks now

Installer remedy

AC HCT (current sensor) failure

Product fit

Safe checks now

Installer remedy

GFCI failure

Product fit

Safe checks now

Installer remedy

Reference 1.5 V failure

Product fit

Safe checks now

Installer remedy

Protective earth (PE) loss

Product fit

Safe checks now

Installer remedy

Internal device failure

Product fit

Safe checks now

Installer remedy