Sierra Wave® Portable 30-Watt Solar Collector is a powerhouse monocrystalline collector ideal for larger electrical/electronic tools, work lights, vehicle batteries (on trickle charge), laptops, cameral equipment, the many Wind 'N Go® . SolaDyne® . Aervoe® and other various rechargeable equipment. Up to 3 Collectors can be connected to create 90 W of electrical power. Superior uses in jobsite, outdoors, marine, aviation and military. Lightweight hard case folds down like a briefcase.