time2roll wrote:
Single switch would require combining the arrays connections to the controllers. Are they combined now?
Otherwise I would be getting three switches. Maybe a single throw triple pole switch if you want one lever to pull.
Each array has a pos wire and a neg wire that go directly to the array's own controller's array terminals. One switch would combine the three pos wires, but the three neg wires would remain separate.
The controllers are in parallel on the battery side so they add their amps (with the same controller Vabs settings), with the same "12v" on the three sets of those wire pairs.
Yes, I would like to be able to turn off all solar with one "throw" instead of three "throws", but I don't know enough about the circuitry here. If it matters, the panels are not "grounded" and the controllers are not "grounded", so that leaves the three neg array to controller wires independent.
I have not checked whether the controllers are all neg or pos "grounded" for which side they "control", but not sure that matters when the controllers are not grounded. The battery bank is neg grounded to frame.
