WHO has solar panels on their boat? I have a 400 Watt system of 4 100 watt panels. They are hooked 2 sets of 2 panels each wired in series, and then both sets are going to the charge controller in parallel. That makes it so if one set of panels goes down or shaded, one set will produce. At rest for the day, electrical usage is a Virtrifigo 9 cu ft fridge.freezer, Bouge RV electric/battery cooler/freezer, toilet pumps, lights and fans running. Solar kept batteries at 100% all day until nightfall. Then there were still the refrigeration running and lights and toilet use. After 10 hours, batteries were down to 90%, and when sun came up they were being brought back up.. RENOGY system with ROVER controller, one of the best things I ever installed. now if it could shoo away the bugs…..