... years warranty energy, sun solar, photovoltaic, solar photovoltaic, pv, solar panels, solar panel Specifications 1) polycrystalline / Mono- crystalline solar panels/ Solar panels/ solar modules2) TUV, IEC, CE ... Toughened glassModule Conversion efficiency15% - 18.5%Frame (Material, Corners, etc.)Aluminium AlloyOperating temperature:-40 to +85Voltage temperature coefficient:-0.33%/Current ...