Sizing the combiner box circuit breaker?
OK, you guys have convinced me that I'm swimming upstream by trying to put together everything I'll need when the e-panel already comes ready to go, so I guess I'll be picking one of them up. However, I'm trying to size my circuit breakers for my PV combiner box and need some advice. From what I gather, the strings (5 of them) will be 2 panels in series, for Vmp of 8.06A each string at around 70v in good sun. So saying, should I have the circuit breakers for each string in the combiner box at 12A? or 10A? 120% of 8.06A is around 9.67A so I think I'm supposed to go with the 10A breakers.... is that right?
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