Panels no voltage

[Dwd902]

I have 2 trinstar 325 volt panels. I moved them from my RV to my Cabin. I hooked everything up correct and my charge controller kept saying it was in night mode and not registering my panel . I went out and my panels have no voltage with the voltmeter. Could the transport have messed sonething up? I moved the about 300 feet nothing radical. Thanks everyone in advanced.

[bob-n]

Sunlight on panels. Panels open circuit. No voltage from panels. That's not a good sign. If all of that is certain, it has to be bad panels.

But both have the same result? That's very surprising. I could imagine one wire or panel being damaged during disassembly, but it is surprising to see both bad.

I assume that your meter is set to DC Volts, with a 50V or 100V range. With sun on the panels and no load, nothing else connected except the voltmeter, I expect 40V or so.

Count the number of cells and multiply by 0.7. That's roughly the open circuit voltage. (60 cells = 42V; 72 cells = 50V) That's not a precise number. On a good 60 cell panel, it could be between 35V and 45V.

By the way, they are probably 325 watt panels, not 325 volt.

[SunEagle]

Sunlight on panels. Panels open circuit. No voltage from panels. That's not a good sign. If all of that is certain, it has to be bad panels.

But both have the same result? That's very surprising. I could imagine one wire or panel being damaged during disassembly, but it is surprising to see both bad.

I assume that your meter is set to DC Volts, with a 50V or 100V range. With sun on the panels and no load, nothing else connected except the voltmeter, I expect 40V or so.

Count the number of cells and multiply by 0.7. That's roughly the open circuit voltage. (60 cells = 42V; 72 cells = 50V) That's not a precise number. On a good 60 cell panel, it could be between 35V and 45V.

By the way, they are probably 325 watt panels, not 325 volt.

Is it possible that the panel wiring or connectors have been damaged during the move or there is a different wiring setup between the RV CC and Cabin CC?

[Dwd902]

Yes sorry 325 watt and they are 72 cell. Yes both panels have the same result. Meter is set to dc 200 volt range direct sun and no load. Voltmeter is on the positive and negative mc4 connectors. It reads 0. But voltometwr works on batteries inside. Set up is exactly the same. Batteries wired then to CC then solar wired then to CC. When first plugged in CC didnt change or anything.