MOTECH solar inverters are a pretty good unit, however they do have one very common problem.
There are two options if your MOTECH 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 MOTECH.
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 MOTECH installation, which means your electrician will easily do the swap over for you.
Option 2: Get the MOTECH 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.
We have only ever seen one fault with the MOTECH inverters:
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
|GridNA||No AC voltage is detected on the grid side.|
|Drift Fac||Islanding is detected|
|VacH||The AC voltage of mains utility is over the upper limit.|
|VacL||The AC voltage of mains utility is under the lower limit.|
|FacH||The frequency of AC voltage of the utility is over the
|FacL||The frequency of AC voltage of the utility is under the
|VpvH||The DC voltage of PV array is over the upper limit.|
|VpvL||The DC voltage of PV array is under the lower limit|
|Imax_AC||Over current on the AC side.|
|DeltaZ||The rate of change of the AC grid impedance is higher
than setting value
|Zac||The AC impedance of the grid is out of range.|
|InvTempMax||The internal temperature of the inverter exceeded the
safe operating limit.
|COMM||External communication failed.|
|RelayX(X=1~4)||Grid connection relay failed.|
|FastEarthCurrent||The drastic change of the leakage current has been
|Riso||The insulation resistance between PV array and the
ground is below the safe operating limit.
|VdcbusH||Internal DC bus voltage is over the upper limit.|
|VdcbusL||Internal DC bus voltage is under the lower limit|
|Internal COMM||Internal communication failed.|
|Watchdog||Internal watchdog function triggered.|
|Idc Test||The DC injection current measurement function failed.|
|RCMA||The leakage current exceeded standard value.|
|RCMA Test||The leakage current measurement function failed.|
|IR Test||The insulation resistance measurement function failed.|
|Offset||Offset check for grid monitoring failed.|
|Temp. Sensor||The internal temperature sensor failed.|
|RAM Test||Memory failed|
|System Error||The system failed.|
|Version Error||The firmware version is not correct.|
|Delta Fac||Internal measurement comparison error or defective
|IpvA,IpvB,IpvC||Over current on the DC side|
|CalDataError||Calibration data is out of range|
|CalDataLoss||Calibration data is lost.|
|AutoTest Error||Autotest fail|