Hi,
I'm new to this area and just purchased the 600w charger below. I connected it to a new 12V 100ah battery with 3x100w panels. The PV panels aren't the issue, as I tested them with another battery and they had inputs. I don't think the battery is the problem either. So, I believe the 600w controller has an issue and isn't charging the battery.
It shows an error code #32.
If anyone knows how to troubleshoot the problem. the controller didn't seem to provide info if it is charging or not.