Solar King Solar Inverter Repair

Solar King Inverter Repair

There is no manufacturers support available for the Solar King Solar inverter, however most problems can be repaired.


There are two options if your Solar King solar inverter has stopped working.

  • Option 1: Purchase a new Inverter.
  • Option 2: Get the Inverter Repaired.


Option 1: Purchasing a new Inverter to replace the Solar King.

If you decide you want to purchase a new inverter, then we suggest the following inverter choices. We base this on knowing the inverters below will just plug straight into your existing Solar King installation, which means your electrician will easily do the swap over for you.

Solar King SLK-1500 – Solis 1.5kW Grid Tie Inverter

Solar King SLK-2000 – Solis 2.0kW Grid Connect Inverter

Solar King SLK-3000 – Solis 3kW Grid Connect Inverter

Solar King SLK-4200 – Solis 4.0kW Grid Connect Inverter

Solar King SLK-5000 – Solis 5.0kW Grid Connect Inverter

Option 2: Get the Solar King Solar Inverter Repaired

This is where we can help.. the process is straight forward. You will need to arrange for an electrician to get the inverter off the wall and into a box; once done we will arrange a courier to pick it up and send it to us, we will fix it, and have it sent back to you – the whole process takes about 14 days from pickup to drop off.
Below are some of the most common Solar King inverter faults we find:

Relay Fault

The output relay fault is a very common problem; sometimes it means the relays need to be replaced, sometimes it will be the output filter capacitors collapsing; either way the inverter will need to be sent to us for repair. When we repair the relays we use OMRON relays, there are a robust industry leading relay and will give much better service life.

Send your Inverter for Repair

Common Fault Codes

Display Possible Actions Fault
Isolation Fault 1. Check the impedance between PV (+) & PV (-) and earth ground. The impedance must be larger than 8MΩ.
2. If above action is useless, the isolation detection circuit fails, replace one unit.
Ground I Fault 1. This is caused by too high ground current.
2. Unplug PV generator from the input, check AC peripheral system.
3. After the cause is cleared, plug PV input again. Check the status of the inverter.
4. If above actions are useless, the GFCI circuit fails, replace one unit
Grid Fault 1. Wait for 30 seconds, if the grid come back to normal, inverter will start again automatically.
2. Make sure grid voltage and frequency meet the specifications.
3. Use PCM solar control to adjust operation range.
4. If above actions are useless, replace one unit.
System Fault
Impedance Fault 1. Grid impedance higher than the permissible value.
2.Wait for 30 seconds, see if it works again.
3.Check the wires between inverter and grid. Change larger wires if necessary.
4.Adjust impedance parameter by PCM solar control program.
5. If useless, the impedance circuit inside failure, please replace another one.
No Utility 1. Grid is not connected; check the AC connection by multi-meter.
2. Check grid connection, such as wire and connector to the inverter.
3. Check breaker between inverter and grid; if it is tripped, DO NOT CLOSE again, replace another unit.
Display Possible Actions Fault
PV Over Voltage  1. Check the PV open voltage, see if it is more than or too close to 500VDC.
2. If PV voltage is much less than 500VDC (e.g. <430V), measure the DCV by multi-meter, compare the readings on meter and LCD, if >5%, replace another unit.
Consistent Fault 1. It is caused by the reading between main and redundant controllers are different.
2. Disconnect PV (+) or PV (-) from the input, start the unit again.
3. If this does not work, replace another one.
Device Fault 1. Caused by improper operation of the circuit.
2. Disconnect PV (+) or PV (-) from the input, start the unit again.
3. If it does not work, replace another one.
Inverter Failure
Over Temperature 1. The internal temperature is higher than specified normal value.
2. Reduce the ambient temperature by some other ways or move inverter to cooler place.
3. If it is not effective, the temperature sensors fails, replace another one.


For more information regarding this inverter click on the link below to view the user manual

Solar King Inverter Manual