Solar voltage drop calculations, new question
Using a calculator: I like this one When figuring wire size from panels to controller for "12v" panels in parallel and PWM controller, we should use 20v as our input, right??? I see writeups wher...
Forum Discussion
I don't think so. Most of the time your battery voltage will be in the 13s which also means panel output is the same. You will never see 20v from the panels. Using 12v or 13v will be more conservative and give a more realistic estimates of true voltage drop. Using a higher arbitrary voltage will make it appear that a smaller wire can be used with the same resulting v drop.
