Growatt inverter error code Error 303
Growatt uses code Error 303 in more than one product range, and it doesn't always mean the same thing. Check which range your inverter belongs to below.
WattMate is not affiliated with Growatt. This page summarises Growatt's own published documentation; your installer and Growatt are the authority on your system. WattMate doesn't repair systems or make site visits.
As documented for Mid 10 30ktl3 Xh
- Meaning
- NE abnormal
- Likely cause
- PE cable connection issue.
- What the manual says to do
- Check if the PE cable is securely connected. Contact support if error persists.
- Manufacturer's severity
- Critical
Growatt's documentation says this one needs your installer.
Extracted from Growatt's published manual. Check it against the manual for your model. Open the source document
As documented for Mod
- Meaning
- NE abnormal
- Likely cause
- Check PE, to ensure that the PE line contact is good.
- What the manual says to do
- If error message still exists, contact Manufacturer.
- Manufacturer's severity
- Critical
Growatt's documentation says this one needs your installer.
Extracted from Growatt's published manual. Check it against the manual for your model. Open the source document
As documented for Mod Xa
- Meaning
- NE abnormal
- Likely cause
- PE line may be poorly connected.
- What the manual says to do
- Check PE to ensure good contact. If error message still exists, contact manufacturer.
- Manufacturer's severity
- Critical
Growatt's documentation says this one needs your installer.
Extracted from Growatt's published manual. Check it against the manual for your model. Open the source document
When to call your installer or the warranty line
Your installer is your first warranty contact. If they've gone, the manufacturer's warranty line still covers the hardware. Don't open the inverter or battery case yourself: work inside it is for a licensed electrician.
If you see smoke, scorch marks or smell burning, switch the system off at the AC and PV isolators and call your installer. If anyone is in danger, call 000.
- Growatt warranty phone
- 1800476928
- Growatt warranty email
- australia@growatt.com
- Growatt service network
- Open the manufacturer's service page