The solar panel should also be cleaned regularly to maximize the amount of power received from the sun. All Sureguard products use the superior polycrystalline type. You can recognize the type of panel simply by looking at it. Polycrystalline panels are constructed from a number of individual silicon cells that are connected together and form the complete panel. Amorphous panels are a glass surface with a uniform black deposit of silicon on the back surface.
Polycrystalline panels are substantially smaller and lighter.
They are always the panel of choice where long life is important. Typical warranty on polycrystalline panels is 10 years. Amorphous panels are fabricated by depositing a thin film of silicon onto a glass surface. An inexpensive solar panel can be produced this way but the glass is susceptible to breakage and the thin film generally disappears from the edge of the panel when it is subjected to moisture. You may have seen a similar effect when moisture gets into the edge of a mirror.