Originally Posted by Huck
Just the opinion of a novice, but screwing down 12 awg wire into the Renogy 30 amp charge controller doesn't make the best connection. 14 awg fits the screw down fine, but I had to trim a few strands of wire off to get the 12 awg to fit.
My 20 AMP Renogy MPPT Controller has pretty big lugs. I have not "measured" them but before I bought I asked Renogy and they said #4 would fit. Just by looking I think that is correct if quite snug. I have no plans to ever go larger than #6 so should be fine.