GoodWe GW5KL-ET

GOODWE offers up to 10 years warranty on inverters; it covers defects but excludes issues from improper installation. Claims can be made through your distributor or installer.

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

Faulty installations, unauthorized modifications, and misuse.

Environment limits

Exposure to sea coasts/saltwater or other aggressive atmospheres without GOODWE's written approval.

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

  1. Make sure the safety country of the inverter is set right. 2. If safety country is right, then 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

  What to do

  Check (use multi-meter) if there is voltage (normally should be close to 0V) between earth & inverter frame.

• 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

  What to do

  1. Use multi-meter to check if the resistance between earth & inverter frame is close to zero. 2. If it's not, please ensure that the connection is well. 3. Check the resistance between PV1+/PV2+/PV3+/PV4+/BAT+/PV- to earth.

• Over TemperaturecriticalCall your installer

  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

  1. Try to decrease surrounding temperature. 2. Make sure the installation complies with the instruction on inverter user manual. 3. Try to close the inverter for 15 mins, then start up again.

• 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

  1. Check if the PV string Voc is lower than the Max PV input voltage of the inverter. 2. Check if the battery voltage is lower than the maximum battery input voltage 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

  1. Check (use multi-meter) if AC side has voltage. Make sure grid power is available. 2. Make sure AC cables are connected tightly and well. 3. 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

  1. Make sure safety country of the inverter is set right. 2. Check (use multi-meter) if the AC voltage (Between L&N) is within a normal range (also on AC breaker side) 3. Make sure the grid voltage of your area is stable and within normal range.

• Back-Up Over Loadwarning

  Manual (PDF)

  Back-up side is overloaded

  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 HighwarningCall your installer

  Manual (PDF)

  BUS voltage is over-high

  Likely cause

  Inverter detects that the bus voltage is too high

  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 HighwarningCall your installer

  Manual (PDF)

  DC component in AC output is too high

  Likely cause

  Inverter detects a higher DC component in AC output

  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 FailurewarningCall your installer

  Manual (PDF)

  EEPROM read/write 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.

• SPI FailurewarningCall your installer

  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.