I replaced the onboard fuses on my mppt controller after blowing them from battery reverse polarity. When testing continuity, I get zero (full continuity) between panel negative input and battery negative output (which i believe is correct), but then between panel input + and battery output +, I'm seeing resistance.
I have a brand new mppt controller that I would prefer to return if my fix was successful, but to compare them, when I tested the continuity on the new one between panel input + and battery output + it reads no continuity (OL).
This makes me think that the one I repaired should also read no continuity instead of showing some resistance. So my qquestio is: what is the correct continuity reading of a controller between panel positive input and battery positive output? Would resistance reading on the one i repaired as compared to reading no continuity on the new one indicate that a diode has also been damaged?
