Quote:
Originally Posted by NH_Bulldog
Just a thought; you mention that the current 200w panel has 12-gauge wiring and that the wiring from the roof is 10-gauge? If there is one 10-gauge wire from the roof, you cannot just add another panel and run two panels through that single 10-gauge wire, you will need to add a second 10-gauge wire or upgrade the existing 10-gauge to 8-gauge to accommodate the increased power. Like Stircrazy mentioned, a 40A controller (or larger) would also be needed.
For example;
14 AWG for 15A
12 AWG for 20A
10 AWG for 30A
8 AWG for 40A
6AWG for 55A
.
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not necessarily, if you run them in series, you will not increase the amperage just the voltage, which is what I would do in his situation. he would still need a new controller that is a MPPT one to do it and to make sure that controler will handle the two panels in series which a renogy 40 amp will as it can handle two 24V panels in series without spending the extra money on the Victron if you don't need to.