KISAE 40400 1800-Watt Power Kit with 40-Watt Solar Panel Complete solar power supply provides up to 1800-watt from four ac outlets Integrated transfer switch and ac charger make the solar home and rv power kit the perfect for emergency and backup power source Plug and play do it yourself set up Auxiliary battery and additional solar panels available to expand system; expandable up to 130-watt maximum from solar array for each battery Ul and csa approved