This panel is constructed with monocrystalline cells: the highest efficiency cells available in the market. Its performance is superior to polycrystalline cells especially when operating in a challenging environment such as very low or high temperatures. Diodes built-in the panel enabling it to work in the shade and prevent reverse charging, extending the panel life. You will not be let down by this product no matter whether you are using it for battery charging, mounting on a caravan or motorhome, grid connection or any other DC application.