This is my second assembly of a small solar system to charge up small batteries and battery packs I use. The panels were purchased as USED and I got 4 pieces. Each has an output of 10 volts. One set consists of two panels connected in series (makes 2 sets) then the two sets connected in parallel for a total voltage of 20V, The charge controller I also replicated from the internet and seems to work very well – simple with no bells or whistles.
Post time: Feb-05-2017