Quote:
Originally Posted by bcrvman
If all the panels are in series, then the amperage is roughly 10 amps. For 10awg you get 2.5% V drop over 30 ft, 1.7% over 20ft. You should be fine. A 100/20 MPPT will be plenty.
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With those panels wired in series with a Voc of roughly over 100v voltage drop is not an issue. The drop is also predicated upon voltage rather than current over the distances noted. In addition I would highly recommend that you use a temp corrected Voc to determine the size of your charge controller. At low temps you will definitely surpass the ratings of the 100/20 MPPT unit referenced.