... *Long-term electrical stability *Best quality High efficiency 156mm poly photovoltaic cell on sale,3BB,A grade PHYSICAL ... .93 mA/K Power -0.43 %/K PACKAGING Typical package for one carton contains 1,200 cells.The cells are sealed ... .Gross weight peri unit carton shall be around 17.1Kg. High efficiency 156mm poly photovoltaic cell on sale,3BB,A grade