OTG SOLAR CAMPING PACKAGE OPTION. One (1), 170 watt Zamp roof-mounted solar panel, expandable up to 510 watts with aftermarket equipment. One (1), 30 AMP Zamp solar charging system. One (1), 1,200 or 2,000 watt pure sine inverter (varies by brand) block quote. I love solving these fundamental industry problems every day and allowing campers to