640WH Lithium Ion Portable Solar Power Storage Solution for light off grid use. This unit weighs only 35 lbs and has a built in easy carry strap that is fixed to its durable metal casing. Excellent choice of backup power supply for light to medium energy needs while off grid. Take it camping, to the cabin, or keep it at home for emergency power outages. This handy portable solar power station can keep a small fridge running for up to 12 hourss. Add this portabel power station to your emergency essentials prepper gear today!