When your solar inverter starts to play up it will display an error code that can help you troubleshoot the problem. In this guide we discuss solar inverter error codes for all the major solar brands & provide troubleshooting to help you fix the problem. 


Fronius Inverter Error Codes

A great thing about Fronius inverters is that they perform self-diagnosis which automatically informs the owner about the problem immediately. Fronius inverter models have different fault and error codes. These codes are categorized as:

  • Class 1 which is a momentary problem and probably caused by the public grid
  • Class 3 which are usually problems in feeding energy to the grid but only for a short period of time
  • Class 4 which already needs the intervention of an accredited solar installer or engineer
  • Class 5 which do not generally interfere with energy feeding but may cause some restrictions

Error Code 314

Error Code 314 on a Fronius inverter means that there is a current sensor calibration timeout or there is an internal system error. Usually, this problem just fixes itself as the inverter repeats its startup routine. If the problem persists, you should contact us on (08) 7078-7620 to investigate the issue.

Error Code 509

If your Fronius inverter encounters Error Code or State Code 509, it means that there is no energy fed into the grid in the last 24 hours. There could be a lot of reasons for this and one of them is that the solar panels are covered in dirt. One of Anew Solar’s service is solar panel cleaning so you might want to contact us to solve this problem. If it still does not work, we will inspect your inverter further.

Growatt Inverter Error Codes

Whenever a Growatt solar inverter experiences faults, it will display the fault or error code. These codes indicate a particular problem or fault that the inverter is in. Listed below are some common error and fault codes that Growatt inverter users may face in the future and how it can be fixed:

Error Code 102

When your Growatt solar inverter displays the Error Code 102, it means that the two CPU sampling date is inconsistent. To fix this problem, turn off the DC switch and wait until the inverter is totally shut down. Turn the inverter on again and observe if it still displays the same error.

Error Code 111

An Error Code 111 usually happens with a Growatt TL3 inverter series. When this error shows up, it means that there is an IGBT drive fault and that you should already contact your solar inverter installer for a checkup.

Error Code 117

An Error Code 117 on a Growatt solar inverter means that there is a problem in the relay circuit. Try to restart the inverter and if the problem persists, you should already contact your solar inverter installer.

Error Code 120

When a Growatt solar inverter displays the Error Code 120, it means that there is a problem with the current sensor. This Error Code is also known as an HCT Fault.

Fault Codes

Growatt solar inverters can experience two types of faults: system faults and inverter faults.

HCT Fault

As stated above, an HCT Fault means that the inverter is having problems with its current sensor. To repair this, simply restart the inverter and if it still isn’t fixed, contact your solar inverter installer.

PV Isolation Low

PV Isolation Low is a system fault on a Growatt solar inverter. This means that the inverter’s PV insulation impedance is too low or out of range.

Zeversolar Inverter Error Codes

Listed below are some common error and fault codes that Zeversolar inverter users may face in the future and how it can be fixed:

Error Code 3

Error Code 3 is also known as a Relay-Check Fault. It means that the output relay of the inverter has failed and might be in need of replacing. This error is displayed as ‘Rly-Check Fault’ in the Zeversolar inverter.

Error Code 34

Error Code 34 is also known as Vac Failure. When your Zeversolar inverter encounters this error code, it means that the grid voltage is out of the permitted range.

Error Code 35

Error Code 35 is also known as Utility Loss. It means that the utility cannot be detected due to the following reasons:

  • There is no utility grid is available
  • The AC cable is damaged
  • A fuse is broken during island mode

Error Code 38

Error Code 38 is also known as Isolation Failure. In this error, the inverter’s PV array’s insulation resistance ground is lower than the permitted value or the electrical insulation has failed.

Error Code 48

Error Code 48 is an external fault that requires an inspection from a solar technician. This is not listed in the user installation manual so it is better to take it up with Zeversolar’s customer service or contact Anew Solar so one of our technicians can look further into the problem.

Goodwe Inverter Error Codes

Whenever a Goodwe solar inverter is faulty, it will display a message indicating what kind of error or problem it is having. Some examples of these error codes are listed below and the possible solutions to them:

Error Code 23

When a GoodWe solar inverter displays an error code 23 message, it means that the inverter is suffering from utility loss and there is a fault or a disconnection in the grid. Check whether the grid and its connection cables are in proper condition or that the cables are connected properly.

Fault Codes

Other GoodWe fault and error codes are as follows:

  • 01 – SPI failure or an internal communication failure
  • 02 – EEPROM R/W failure or memory chip failure
  • 03 – Fac failure or the grid frequency is out of range
  • 07, 25 – Relay check failure or a relay self-checking failure
  • 13 – Overhigh DC injection
  • 14 – Isolation failure
  • 15 – Vac failure
  • 16 – EFan fault
  • 17 – PV over voltage
  • 19 – Over temperature
  • 20 – IFan fault
  • 21 – DC Bus High
  • 22 – Ground I Failure
  • 30 – Ref 1.5V failure
  • 31, 24 – AC HCT failure
  • 32, 26 – GFCI failure
  • Others – Device failure

Eversolar  Inverter Error Codes

Like any other solar inverters, Eversolar also has its own fair share of inverter faults that are experienced by its users. Below are some of the most common inverter faults:

Isolation Fault

An Isolation Fault message on your Eversolar inverter could mean that there is wrong with the cables or wiring or it could mean that there is an internal fault with the inverter. If all the solar system cables are all properly connected, then you should already contact a solar expert because your inverter is not working.

Relay Fault

When an Eversolar inverter has a Relay Fault error, it will reboot itself until the problem is fixed. However, if it keeps displaying the same message after countless reboots, there is something wrong with the inverter and it might be best to contact a solar expert to look at it.

Other Inverter Error Codes

If your solar inverter is not mentioned above then please click on the appropriate link below to find more details about error codes for your brand:

If you need help fixing your solar inverter then please call Chris at (08) 7078 7620