Very good design. Receiving a 72 watt charge from a Jackery 500 in full sun (with some haze in the upper atmosphere). Last night when I forgot to set the panel to daylight I still got 47 watts when I turned it to face the sun so it wasn't a waste of time. I love the convenience of a foldable design with a strong magnet closure that can be assembled and disassembled every day. The charging cord is short if you have an RV and don't want to leave the generator outside, or you're plugged into a 12v fridge indoors, so I ordered a 20ft Anderson extension cord to run anywhere in and around the rig https://www.amazon.com/PolyEnergy-Extension-Connector-Compatible-Generator/dp/B091J2J9PV/ref=sr_1_4?crid=3LK1HDKZ5VK3A&dchild=1&keywords=anderson+connector+solar&qid=1626903865&s=lawn-garden&sprefix=anderson +con%2Clawngarden %2C356& 1-4. I'm older and that carries some weight in case anyone is interested. For the price and the quality I am very satisfied and can recommend it. (I just wish they wouldn't stop making 120w panels, that would be even better).