Disappointed by the velcro scratches which do not hold and peel off after a few days despite having cleaned the support and followed the recommendations. Two of the 4x solar panels are peeling off. Besides that, the panel plays its role well and recharges the battery. I am still at 100% charge after 20 days for two Curtains, and the other two are at 99% and 98% (but they are in the north and not exposed to the sun for long) The product itself is a success for the moment. Perhaps think of a support system that allows the panel to be hung without velcro with uprights that would descend on each side of the curtain and allow the curtain to be hung or suspended a little lower below in the extension of the curtain.