Conductor Sizing

solarj

How to figure conductor size? 3 panels in series 5 parallel Isc 9.71 amps going 40 feet to charge controller.

9.71x5=48.55x1.25=60.68x1.25=75.8 looks like #2 awg
Does this sound right?

Ethan Brush

solarj wrote: »

How to figure conductor size? 3 panels in series 5 parallel Isc 9.71 amps going 40 feet to charge controller.

9.71x5=48.55x1.25=60.68x1.25=75.8 looks like #2 awg
Does this sound right?

I agree with your 75.8 amp number, assuming no adjustments for CCC or temp. However your wire size is unnecessarily large. #4 copper easily does it.

oil pan 4

Copper or Aluminum?