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More info—I figured out the wiring. All 6 panels are wired in series. I should see about 120v. Today is reasonably sunny. I’m measuring 50v at the MPPT which is what it is reporting. Went on the roof & disconnected the panels from the MPPT. 50v. Then I disconnect all the panels & measured...

Thanks—I’ve got to get more info, because... …I just went on the roof. Two of my panels wire into one connection box, and they’re wired in series. The other four panels go into another connection box, and those 4 are wired in series. All the 4 main wires (two out of each connection box)...

I have 6 panels. My recollection is that they are 120W each. They go into a Victron MPPT. Tomorrow when I get my meter I’ll check the connections on the roof and I’ll check the actual voltage at the MPPT.

I wish it were clouds. Then it is just me being stupid :) Sunny days. It stays off for the entire day. It’s reported voltage floats around 50v. I’ll get a volt meter tomorrow & I can check the individual panels and the actual voltage into my MPPT. It all worked perfectly a year ago. The...

Hi— I’ve got a Victron system at 48v and about 720Watts of panels (on my canal boat). Everything had been working great. But now… When the sun starts coming up the MPPT reports over 60v from the panels (perfect) and charging begins. But within about 30 minutes my reported panel voltage drops...