Charles in Aus.
Well-known Member
Could someone please help me out with a projected voltage drop calculation ?
I need to lay cable from the solar panels at my barn to the machine room that houses the battery bank .
The distance is 40 metres / 130 feet . I have two[ one positive one negative ] 25mm2 cables with cores of about 20 copper strands each and am hoping that these will be heavy enough to use over this span without compromising the charge current too much .
Output from the panels is aproximately 18.5 volts at full capacity , regulator charges at 13.5 v .
I need to lay cable from the solar panels at my barn to the machine room that houses the battery bank .
The distance is 40 metres / 130 feet . I have two[ one positive one negative ] 25mm2 cables with cores of about 20 copper strands each and am hoping that these will be heavy enough to use over this span without compromising the charge current too much .
Output from the panels is aproximately 18.5 volts at full capacity , regulator charges at 13.5 v .