I used the Massimo Portable Solar Panel to charge up my new Massimo 300W 12V Portable Lithium Battery Power Station, while camping and it performed great. The Solar Panel charged up the Power Station from about 35% to 97% in only a few hours. Everything worked as expected in the instructions, as well or better than hoped for. I would highly recommend both the Massimo Solar Panel and Power Station for anyone wanting power to charge their devices with their own Power Grid wherever it is needed.