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Old 11-27-2019, 03:22 PM   #16
PNW Fireguy
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M.O.C. #18081
Quote:
Originally Posted by jetskier View Post
10awg would work from the panels to the controller if you run half the panels in series and tie them in parallel at the combiner. If you're doing a full parallel system, you will need the larger size. 2 or 4 awg from the controller to the batteries is optimal for the 100a controller output at 13-14 volts

My 855w array operates at around 50-55v at 17 amps in peak conditions feeding the controller. Well within the permitted current limit of 10awg wire (30amps).

While true why would one not take advantage of the larger wire size for lower voltage drop?
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