The Goal Zero Nomad 100 Portable Solar Panel generates power when exposed to direct sunlight, and charges most handheld USB devices such as smartphones. To produce the most power, angle the panel toward the sun. This improves your ability to collect power from the sun. Clouds and windows affect collection efficiency. If you would like to store power, combine the Nomad 100 with a Goal Zero recharger. It works best with the Goal Zero Sherpa 50/100 Recharger, Yeti 150/400/1250 Solar Generator. Solar Panel Features Cell Type: Monocrystalline Solar Capacity: 100W Voltage: 18-22V Solar Port: 14-22V, up to 8A MC-4 Male/Female: 14-22V, up to 8A Dimensions(Unfolded): 520mm x 1511mm x 25.4mm Dimensions(Folded): 520mm x 393.7mm x 50.8mm Weight: 4600g What’s In The Box Goal Zero Nomad 100 Solar Panel x 1