Goal Zero Nomad 20W Solar PanelThe Goal Zero Nomad 20W Solar Panel combines highly efficient monocrystalline technology in a fold able, portable, plug and play form. With a built in junction box and innovative smart chip, the Nomad 20 can directly charge handheld USB and 12V devices directly from the sun, just as fast as the wall. Combine the Nomad 20W Solar Panel with any of Goal Zeros power packs and store power to charge your gear day or night. Patented chaining technology