Hi
I have 5 panels on a sailing boat with 5 MPPT controllers (1 per panel). One of the MPPT controllers (older one) is showing a voltage around 13.28V where the others and the BVM are showing 13.59V. I have checked the voltage at the MPPT using a multimeter and it also shows 13.59V.
Resetting the system does help, but only temporarily. The MPPT only shows the correct voltage for a few minutes. Does any one have any suggestions?
I don’t think it’s cables but I will check (again). The faulty MPPT controller has a larger negative cable to the others, but I doing think this is the issue.
