PowerSPOT 250s20 Solar Rechargeable Generator Lightest weight in its class. Composite Resin Plastic case: waterproof seal (IP65 rated) 250W Pure Sine Wave inverter for clean efficient energy that will not harm sensitive electronics 32Ah LiPo IO Polymer battery that are rechargeable using built-in solar panels. Outlets are covered and protected from rain, water, dust, and dirt for unit protection and longer lifespan.