Polycrystalline panels are comprised of multiple polycrystalline fragments melted together, resulting in their unique checkerboard overall look. Copper Indium Gallium Selenide (CIGS) is another material system of this technology that achieves similar general performance to silicon although making use of a lot less toxic elements. International output: Most polycrystalline silicon https://charliecqaiq.blogoscience.com/42087069/what-does-solar-cell-psi-mean