This system at burning man mainly powered a 3.5 cubic fridge which draws about 750 watt hours a day. There was also a fairly small stereo, 80 watt projector light for the disco ball, coffee grinder, cordless tool charging, 4 strings of LED Xmas lights and a charging station for a projector trike. There was also the occasional people stopping by to charge their digital cameras and such. The battery bank consisted of 4-6volt 220 amp hour T105's. Theoretically, there is 4000 watt hours of storage if drawn over 20 hours but they were always floating by 1 or 2 the next day anyway.