I asked the RV dealer/repair shop to install it for me in February. It worked fine but the camper never went online to recharge the dead batteries until today. After 4 hours of charging I unplugged it and the green light inside went out. All internal electronics are disabled. After that I used the charger to charge each battery separately. They were at 1% when I started and I've taken them to 80%. The camper still has no power. I checked all the fuses and they were all fine. Reverse Breakers. ? Maybe it was the batteries. I have ordered new AGM deep cycle batteries. I'll update as soon as I have them and plug them in. Maybe the green light will come back and everything will be fine, anyway I'll let you know and update this review. Update: The installer did some sloppy wiring which another RV dealer fixed for me. The block works perfectly again.