I took my 2015 Airstream Interstate Grand Lounge to airstream Factory service center in Ohio. My solar panel was not charging house batteries so they changed the solar panel controller box. I drove back to my home in Wisconsin. Issue - my batteries have stopped charging from engine power. What can someone do while replacing solar panel controller to stop engine charging. It was working great before!
I live 500 miles away from factory service center so I cannot take my van back to them. Any suggestions what I should look for? Btw + solar panel charging is working fine now