40W Folding Solar Panel, Portable USB/DC Charger For RV, Camping Outdoor Use

Polycrystalline Silicon: The solar panel is made of polycrystalline silicon material, which has high battery efficiency and stable and reliable long term output. High Conversion Efficiency: Outdoor solar panel has higher conversion efficiency, better output efficiency, lower light efficiency. Strong Applicability: Polysilicon solar panel is applicable to car batteries, cars, RV, ships, aircraft, outdoor agriculture, planting, tourism, and solar street lamps.