I'm building out a 7x12 cargo trailer camper. I want to be able to run a 5k btu window ac (455 watts) during the day without drawing the batteries down. Nights in Idaho are not really an issue because it cools way down at night. I can get 4 - 250 watt panels on the roof, and for some extra "ooph", I'm thinking about mounting a hinged panel on each side of the trailer. Pluses - more wattage, awning over windows for shade. Minuses? Would bifacial panels be good for the side mounts? Trailer is white. Thx