GW25K-ET (AS4777-2 2020)

GOODWE provides a limited warranty of up to 10 years for their inverter products, covering manufacturing defects. Exclusions include damage from improper installation, unauthorized modifications, and environmental factors such as salt exposure. To make a claim, contact your distributor or installer, or submit a service request on GOODWE's website within one month of failure.

AI-summarised from the manufacturer warranty document. Always confirm against the linked PDF before relying on it for a claim.

Coverage shape

Full-replacement coverage

If you sell the home

Transfers to the next homeowner

What voids it

Warranty voids due to faulty installations, unauthorized modifications, or repairs; usage of batteries not compatible with GOODWE’s inverter; failure to report product issues within one month; normal wear and tear; acts of nature.

Environment limits

Faults or damage caused by exposure to sea coasts/saltwater or other aggressive atmospheres or environmental conditions without GOODWE’s written confirmation prior to the installation.

Showing 14 of 14. The official install manual is the authoritative source — always confirm before acting.

• FAC FailurecriticalCall your installer

  Manual (PDF)

  Grid frequency is not within permissible range

  Likely cause

  Inverter detects that the grid frequency is beyond the normal range required by the safety country

  What to do

  Make sure the safety country of the inverter is set right. If safety country is right, please check on the inverter display if AC frequency (Fac) is within a normal range.

• Ground FailurecriticalCall your installer

  Manual (PDF)

  Ground leakage current is too high

  Likely cause

  Ground failure could be caused by multiple reasons like that the neutral cable on the AC side is not connected well or the surrounding humidity is comparatively heavy, etc.

  What to do

  Check(use multi-meter) if there is voltage (normally should be close to 0V) between earth & inverter frame. If there is a voltage, it means the neutral & ground cables are not connected well on the AC side.

• Isolation FailurecriticalCall your installer

  Manual (PDF)

  Ground insulation impedance of PV string is too low

  Likely cause

  Isolation failure could be caused by multiple reasons like that the PV panels are not grounded well, DC cable is broken, PV panels are aged or surrounding humidity is comparatively heavy, etc.

  What to do

  Use multi-meter to check if the resistance between earth & inverter frame is close to zero. If it's not, please ensure that the connection is well. If the humidity is too high, isolation failure may occur. Check the resistance between PV to earth. If it is lower than minimum isolation resistance shown in the table, check system wiring connection.

• PV/BAT OvervoltagecriticalCall your installer

  Manual (PDF)

  The PV or BAT voltage is too high

  Likely cause

  The total voltage (open-circuit voltage) of each PV string is higher than the maximum DC input voltage of the inverter or the battery voltage is higher than the maximum BAT input voltage of the inverter

  What to do

  Check if the PV string Voc is lower than the Max PV input voltage of the inverter. If the Voc of the PV string is high, please decrease the number of PV panels to make sure that Voc is within the maximum DC input voltage range of the inverter.

• Relay Check FailurecriticalCall your installer

  Manual (PDF)

  Self-checking of relay failure

  Likely cause

  Neutral & ground cables are not connected well on AC side or just an occasional failure

  What to do

  Check(use multi-meter) if there is high voltage(normally should be lower than 10V)between N&PE cable on the AC side. If the voltage is higher than 10V, it means the Neutral & ground cable are not connected well on AC side or restart inverter.

• Utility LosscriticalCall your installer

  Manual (PDF)

  Public grid power is not available (power lost or on-grid connection fails)

  Likely cause

  Inverter does not detect the connection of grid

  What to do

  Check(use multi-meter) if AC side has voltage. Make sure grid power is available. If all is well, please try to turn off AC breaker and turn on again in 5 mins.

• Utility Phase FailurecriticalCall your installer

  Manual (PDF)

  The sequence of the on-grid wire is incorrect

  Likely cause

  The inverter has detected that the phase angles of L2 and L3 are reversed

  What to do

  Check(use multi-meter) if AC side has voltage. Make sure grid power is available.

• VAC FailurecriticalCall your installer

  Manual (PDF)

  Grid voltage is not within permissible range

  Likely cause

  Inverter detects that AC voltage is beyond the normal range required by the safety country

  What to do

  Make sure the safety country of the inverter is set right. Check(use multi-meter) if the AC voltage(Between L&N) is within a normal range(also on AC breaker side)

• Back-Up Over Loadwarning

  Manual (PDF)

  Back-up side is over loaded

  Likely cause

  Total back-up load power is higher than the back-up nominal output power

  What to do

  Decrease back-up loads to make sure the total load power is lower than back-up nominal output power.

• DC Bus Highwarning

  Manual (PDF)

  BUS voltage is over-high

  Likely cause

  /

  What to do

  Try to restart the inverter. Check if the fault still occurs. If not, it means it is caused by an occasional situation, or contact after-sales.

• DC Injection Highwarning

  Manual (PDF)

  Higher DC component in AC output

  Likely cause

  /

  What to do

  Try to restart the inverter, check if it still occurs. If not, it is just an occasional situation. Otherwise, contact after-sales immediately.

• EEPROM R/W Failurewarning

  Manual (PDF)

  Internal communication failure

  Likely cause

  Caused by a strong external magnetic field etc.

  What to do

  Try to restart the inverter, check if it still occurs. If not, it is just an occasional situation. Otherwise, contact after-sales immediately.

• Over Temperaturewarning

  Manual (PDF)

  Temperature inside of the inverter is too high

  Likely cause

  The inverter's working environment leads to a high temperature condition

  What to do

  Try to decrease surrounding temperature. Make sure the installation complies with the instruction on inverter user manual. Try to close the inverter for 15 mins, then start up again.

• SPI Failurewarning

  Manual (PDF)

  Internal communication failure

  Likely cause

  Caused by a strong external magnetic field etc.

  What to do

  Try to restart the inverter, check if it still occurs. If not, it is just an occasional situation. Otherwise, contact after-sales immediately.