I had two the same on by bicycle camper, to charge my 2 x 10 ah lithiums, and my 9ah and 11ah ebike batteries. One panel was on top of the camper, and one panel was on either side, - swapped them around depending on what side the sun was during the day. Those panels did a great job, and I consistently got 97 watts per panel on a good sun day. Each day the panels were charging the 2 house lithiums, and one ebike battery . I used the camper for 3 months on local trips, and sold the lot for 4 times what I built the camper for. I highly recommend the renogy panels. Their is a well known bloke on Wikicamps solar thread that has tested them, and uses them himself, and it was his reviews on them that made me go ahead and put them on my camper.