Solar panels may look simple, but their design is a marvel of engineering. Top Layer: Tempered Glass Durability: Protects against weather, debris, and UV radiation. Transparency: Allows maximum sunlight penetration (up to 92% light transmission). What is underneath a solar photovoltaic panel? What lies beneath a solar photovoltaic panel involves several crucial aspects that contribute to its efficiency and functionality. Wiring and Electrical Components, 3. Encapsulation: EVA. These components include the solar cells that convert sunlight into electricity, a backing material that supports the solar cells, an encapsulant that protects the cells, a junction box that houses electrical connections, and often a mounting system that secures the panel to a structure. The surface angle, intensity of sunlight, and any barriers between the sun. Solar panels are devices that convert sunlight into electricity. " Because most appliances don't use DC electricity, devices called inverters then convert it to.