The internet can be a confusing place when it comes to technical support and resolutions, especially regarding an increasingly common device such as your Growatt inverter. Nonetheless, consider this your easily digestible source for Growatt error codes and what you should do to enable a swift resolution in the event of experiencing one.
Find your Growatt error codes with ease:
1. Record the error code number displayed on the inverter.
2. Note whether you have a grey (Gen1) or white (Gen2) inverter colour.
3. Skip to your Growatt inverter error code using one of the buttons in the menu below.
Example: If error code 302 is displayed, tap the 3xx button below. Locate 302 and select the Error Code – 302 tab.
Need additional insight? Post your Growatt error codes and questions in the comments at the bottom.
Over the last decade, Growatt has come a long way as a regarded inverter manufacturer. So much so that in 2020 they were the world’s No.1 Residential inverter manufacturer by market share according to IHS Markit. Such demand is attributed to a well-rounded technology at an attractive price. Therefore, if you’re experiencing a Growatt error code, don’t panic. Chances are there’s a logical solution. Potentially even something external affecting its operation.
IMPORTANT: Older model, 1st Generation Growatt inverters (grey colour) experience warning codes. Newer model, 2nd Generation Growatt inverters (white colour) experience error codes. For your convenience, this post contains both.
Gen1 – grey inverter. Tap a button to go to Growatt warning codes.
Gen2 – white inverter. Tap a button to go to Growatt error codes.
Extracted directly from the manufacturer’s handbook, updated regularly with new codes as they arise, and interpreted in easy-to-understand formats where such only sometimes exists. For additional insight, see References at the bottom of this post.
Gen1 Inverters - grey
2xx
Growatt warning codes
Description: String fault.
What to do: After shutdown, check the panel is normal. If error message still exists, contact your solar installer.
Description: String PID quick connect terminal detection error.
What to do: After shutdown, check the string terminal wiring. If error message still exists, contact your solar installer.
Description: DC SPD function abnormal.
What to do: After shutdown, check the DC SPD. If error message still exists, contact your solar installer.
Description: PV1 or PV2 Circuit short.
What to do: Check the PV panel polarity. Restart the inverter. If the warning still exist contact your solar installer.
Description: Dryconnect function abnormal.
What to do: After shutdown, Check the dry Dryconnect wiring. If the warning still exist contact your solar installer.
Description: PV1 or PV2 boost broken.
What to do: Restart the inverter. If the warning still exist contact your solar installer.
Description: AC SPD function abnormal.
What to do: After shutdown, check the AC SPD. If the warning still exist contact your solar installer.
Description: USB over-current.
What to do: 1. Unplug the U disk or monitor. 2. Re-access U disk or monitor after shutdown. 3. If the warning still exist contact your solar installer.
Description: DC Fuse Open.
What to do: After shutdown, check fuse. If the warning still exist contact your solar installer.
Description: The DC input voltage is exceeding the maximum tolerable value.
What to do: Immediately disconnect the DC switch and check the voltage. If the warning still exist after the normal voltage is restored, contact your solar installer.
Description: PV Reversed.
What to do: Check PV input terminals. If the warning still exist contact your solar installer.
3xx
Growatt warning codes
Description: No utility.
What to do: Confirm grid is lost or not. If the warning still exist contact your solar installer.
Description: Grid voltage outrange.
What to do: Check the AC voltage is in the range of standard voltage in specification. If the warning still exist contact your solar installer.
Description: Grid frequency outrange.
What to do: Check the frequency is in the range of specification or not. If the warning still exist contact your solar installer.
Description: EPS mode, over load.
What to do: Reduce the load of EPS output. If the warning still exist contact your solar installer.
Description: CT Open or Wrong.
What to do: Check if AC current sensor is well connected. If the warning still exist contact your solar installer.
Description: CT line reversed or Ground fail.
What to do: Check the L line and N line of SP-CT is reversed or not. If the warning still exist contact your solar installer.
Description: Communication fault M3 didn’t receive SP-CT data.
What to do: Check communication wire. If the warning still exist contact your solar installer.
Description: Communication fault.
What to do: Check communication wire. If the warning still exist contact your solar installer.
4xx
Growatt warning codes
Description: Fan function abnormal.
What to do: After shutdown, check the fan connection. If the warning still exist contact your solar installer.
Description: Inverter communicates with Meter abnormal.
What to do: Check if the meter is on. If the warning still exist contact your solar installer.
Description: Optimizer and inverter communication is abnormal.
What to do: Check if the optimizer is on. If the warning still exist contact your solar installer.
Description: String communication abnormal.
What to do: After shutdown, check the string panel wiring. If the warning still exist contact your solar installer.
Description: EEPROM abnormal.
What to do: Restart the inverter. If the warning still exist contact your solar installer.
Description: Firmware version is not consistent.
What to do: Update the right version firmware. If the warning still exist contact your solar installer.
Description: Boost module error.
What to do: Rester the inverter. If the warning still exist contact your solar installer.
Description: NTC Temperature too high or NTC is broken.
What to do: Restart the inverter. If the warning still exist contact your solar installer.
Description: NTC is broken.
What to do: Restart the inverter. If the warning still exist contact your solar installer.
Description: CT Connect abnormal.
What to do: Restart the inverter. If the warning still exist contact your solar installer.
Gen2 Inverters - white
2xx
Growatt error codes
Description: AFCI (arc-fault circuit interrupter) fault.
What to do: After shutdown, check the PV panel terminal. Reset the inverter. If the error keeps showing, contact your solar installer.
Description:Leakage current too high.
What to do: Restart the inverter. If the error keeps showing, contact your solar installer.
Description: The DC input voltage is exceeding the maximum tolerable value..
What to do: Immediately disconnect the DC switch and check the voltage. If the fault keeps showing after the normal voltage is restored, contact your solar installer.
Description: PV isolation Low.
What to do: After shutdown, check whether the panel shell is reliably grounded. If the fault keeps showing, contact your solar installer.
3xx
Growatt error codes
Description: AC V Outrange.
What to do: Check grid voltage. This fault will fix itself. If the error keeps showing despite grid voltage returning tolerable range, contact your solar installer.
Description: AC terminals reversed.
What to do: heck AC terminals. If the error keeps showing, contact your solar installer.
Description: No AC Connection.
What to do: After shutdown, check AC wiring. If the error keeps showing, contact your solar installer.
Description: NE abnormal.
What to do: Check PE, to ensure that the PE line contact good. If the fault keeps showing, contact your solar installer.
Description: AC F Outrange
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: Over Load Fault.
What to do: Check whether output load over range; If load too large, please reduce load. If the error keeps showing, contact your solar installer.
Description: CT LN Reversed.
What to do: After shutdown Check the SP-CT connection. If the error keeps showing, contact your solar installer.
Description: Communication fault M3 didn’t receive SP-CT data.
What to do: Check communication wire. If the error keeps showing, contact your solar installer.
Description: Communication fault; Pairing time too long.
What to do: Restart pairing. If the error keeps showing, contact your solar installer.
4xx
Growatt error codes
Description: DCI bias abnormal.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: DC Voltage High Fault.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: Output DC current too high.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: Output current unbalance.
What to do: After shutdown, check the output current is not balanced. If the error keeps showing, contact your solar installer.
Description: Bus sample fault.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: Relay fault.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: Init model fault.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: AutoTest failure.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: Over temperature.
What to do: After shutdown, check the temperature. If the error keeps showing, contact your solar installer.
Description: Bus voltage abnormal.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: Communication board and control panel sampling battery voltage is inconsistent.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: Communication fault.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: Temperature sensor connection is abnormal.
What to do: After shutdown, check the temperature sampling module is connected properly. If the error keeps showing, contact your solar installer.
Description: IGBT drive fault.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: EEPROM fault.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: Internal power test fail (PV Power low).
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: Over current protected by software.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: The grid voltage sampling is inconsistent.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: DSP and COM firmware version un-match.
What to do: Check the firmware version. If the error keeps showing, contact your solar installer.
Description: Inconsistent leakage current sampling.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: GFCI fault.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: CPLD is abnormal.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: Sampling is inconsistent.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: Communication board and control panel sampling battery voltage is inconsistent.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Description: AFCI self-test fault.
What to do: Restart inverter. If the error keeps showing, contact your solar installer.
Reference
PSW Life Support compiled this customer support page with the assistance of the Growatt manual. Resolving Growatt error codes should always follow the manufacturer’s instructions to ensure warranty. For persistent error codes, contact your installation company.
- Growatt global download centre
- Growatt MIC single-phase manual
- Growatt MIN single-phase manual
- Growatt MOD three-phase manual
- Growatt MID three-phase manual
