I have a simple solar setup in my campervan. 200W of solar on the roof, leading through an mppt controller to a 100Ah lithium battery. I’ve been using it for four years now without a hiccup.
However, a few days ago after a week of cloudy days, everything went blank. The MT50 display was gone, as was the BMV-712 screen. The sun came out and it made no difference.
I then hooked up a 120W portable panel using a simple controller, and the screens started coming to life over a couple of days. I got the battery up to 100% charge. When I disconnect the portable solar panel, the rooftop solar simply does not register. Any ideas on how to get it going again?
However, a few days ago after a week of cloudy days, everything went blank. The MT50 display was gone, as was the BMV-712 screen. The sun came out and it made no difference.
I then hooked up a 120W portable panel using a simple controller, and the screens started coming to life over a couple of days. I got the battery up to 100% charge. When I disconnect the portable solar panel, the rooftop solar simply does not register. Any ideas on how to get it going again?