We recently hooked up with Zamp Solar a local Solar Panel Manufacturer out here in Bend Oregon and picked up a couple rooftop panels for our Rental Teardrop Camper Fleet. We installed a 70 watt panel on the roof of our Teardrop Trailer and tested its capabilities on a sunny day out at the Crooked River. After a full day of running every usb plug, fan and light we have the panel did its job we stayed completely off battery the entire day. We are really excited about Solar on our Teardrops to extend your dry camping capability's. With just a single 70 watt Solar Panel you'll almost never need to plug into "shore power" to charge the battery.