20 amp charge controller setup issues
I am new to using solar panels and have multiple questions. 1. Should display go out when solar panel is disconnected? 2. Why would controller show 0% battery charge but battery shows 12.6 volts? 3. I bought 25 ft mc4 cords to reach the roof( may be overkill) but when you plug the male to female + is to - instead of + to +, is that how it should be as you can't switch them cause you will have a male to male together. Also is there a way to reset an error code? My battery wasn't fully charged but I connected it and I got a error code over discharged. I disconnected it and recharge my battery to 12.6 but I'm still getting the error code so is there a way to reset that? I have a renogy 20 amp charger controller with positive ground, it is a 12/24 volt system. I have a 18.5 volt 150 watt panel and it is connected to a 12 volt battery.