Polycrystalline solar module, also known as multi crystalline solar modules, is a type of photovoltaic module that use multiple crystal fragments to convert sunlight into electricity. This module is made by melting down multiple silicon fragments together to form a solid block, which is then cut into wafers and processed into solar cells. The polycrystalline solar module is distinguishable by its blue color and the visible grain lines on the surface of the solar cells.