The disappearing polycrystalline solar panel
Most solar panels on the market today as made with silicon. There are two types: polycrystalline and monocrystalline silicon. To make monocrystalline solar cells, a single large crystal is grown. In contrast, polycrystalline silicon is made from small crystals that are formed into a larger ingot. With both types, the silicon is sliced into thin wafers to make individual silicon cells. Growing a large crystal of silicon is a more difficult process, which is why monocrystalline solar panels have traditionally been more expensive.