A backsheet is the protective outermost layer on the backside of a solar PV module. It plays a critical role in module durability by shielding internal components—especially the solar cells and circuitry—from moisture, UV radiation, electrical stress, mechanical damage, and. New solar panels often arrive with protective film—but should it stay on? This comprehensive guide explains the crucial difference between factory shipping films (which must be removed) and aftermarket plastic covers (which have specific valid uses). The plastic film adhered to solar light cells is primarily a protective layer, crucial for shielding the delicate photovoltaic material from environmental damage, such as moisture, UV radiation, and physical abrasion. These are easy to install and remove. EVA stands for ethylene-vinyl acetate.
