Solar wiring question
Currently I have 2 100 watt panels on top of the trailer (VOC 21.6 volts, ISC 6.34 amps, VPM 17.4 volts, IMP 5.75 amps) with a 30 foot run of 12ga wire to the charge controller. Last fall my system...
Forum Discussion
Ed_Gee wrote:
Since I did not see any previous comment on this, I thought I would point out that voltage loss on 30 feet of 12AWG is approximately 9%.....pretty high. Most professionals I have dealt with don't want to exceed 3% loss.
It is worse using this calculator. I wonder if that one was for the round trip or just one way. This one gets 14.x% using #12 and 5.x% using #8 copper at 30 ft distance (a "set", so round trip) at 20 amps at 13v DC (unless I messed up of course!)
https://www.calculator.net/voltage-drop-calculator.html?material=copper&wiresize=2.061&voltage=13&phase=dc&noofconductor=1&distance=30&distanceunit=feet&eres=20&x=37&y=10
