I purchased a 120 watt rigid solar panel system from GO POWER (available through Defender Industries). The panels fold into a carry case and can be set up at any angle up to 15 ft from the teardrop which will allow the teardrop to be under a shady tree while the solar panels are in the hot sun. If I am needing to charge while under way I can either strap them to the teardrop roofracks (though I’dnrather have a kayak or two up there) or in the bed of my pickup. These panels have an integral charge regulator to protect the battery. I am still cogitatingnon the best way to get the cord into the teardrop to the battery. Am debating between a pass throung as on the prototype or some sort of hard wired plugin jack in the transom.