... *Long-term electrical stability *Best quality High efficiency 156mm poly photovoltaic cell on sale,3BB,A grade PHYSICAL ... standard testing conditional (STC):1,000w/m2,AM1.5, 25°C , Pmax:Positive power tolerance. TYPICAL TEMPERATURE Voltage -2.14 mV ... .Gross weight peri unit carton shall be around 17.1Kg. High efficiency 156mm poly photovoltaic cell on sale,3BB,A grade