I have a keystone outback camper that was pre wired with the Zamp solar system, I bought a Victron MPPT 100/20 charge controller. I installed it and set up my batter and it sees it and tells me its stats with no issue. So bought two Renolgy 100watt panels to place on the roof, when I plug them in I get nothing on the app for the solar, I know I have heard that you need to change the polarity so I used the adapter that came with the wiring harness and I still get nothing. What am I missing?