Polycrystalline solar panels are made from silicon solar cells that are composed of multiple crystal structures. These crystals are formed by melting raw silicon and then casting it into square molds, resulting in the characteristic "grainy" appearance of polycrystalline solar cells. The manufacturing process for polycrystalline solar panels is simpler and less expensive compared to monocrystalline panels. It involves melting raw silicon at high temperatures, casting it into molds, and then cutting the ingots into wafers. While this process results in lower purity silicon compared to monocrystalline panels, it also generates less waste and requires less energy.
