Sunpower solar panel is the new and popular solar panel in the market now. It adopts U.S.-made high efficiency Sunpower solar cell (efficiency can reach ~ 23%) , which is the highest efficiency solar cell in the world, it can gain more power than traditional solar cell within same area. The surface material of Sunpower solar panel can be PET film or ETFE film. The construction of Sunpower Solar Panel is PET or ETFE / EVA / Sunpower Solar Cell / EVA / PCB Back.