Originally Posted by Scottxray
As far as the Zamp plug. Yes, they wire their plugs backwards from most. You can buy a coupler that will fit and it will reverse the polarity so other companys panels and cables will still work.
This is not necessary if one is wiring in a new controller. If controller is going to be mounted on back of one panel like many solar suitcases have, just check polarity at plug and wire accordingly.
If solar controller is going to be mounted in RV, locate wires from side mounted plug, cut into them and splice in controller (adding enough wire to reach if necessary) and again, polarize accordingly.
I would avoid adapters at all cost. Darn things can get lost when not connected and are just another point of resistance leading to voltage drop.