Polycrystalline Cells: What are they? How are they made?

January 10, 2022

What are polycrystalline cells?

Polycrystalline cells are the conductive powerhouses of solar panels. These cells are what convert the sun’s energy into usable electricity. They consist of multiple silicon fragments melted together to form a panel. They have a mosaic appearance, similar to a piece of abstract art.

Polycrystalline cells rank high in durability and longevity and are comparable in efficiency to their monocrystalline cousins.

HOw are they made?

To create polycrystalline cells, about 1300 pounds of silicone rock is loaded into a quarts mold, then heated to 2500 degrees Fahrenheit in a large furnace. It takes roughly 20 hours for the silicone to melt, and up to 3 days to cool down. Once the silicone cools, the material is cut down into individual wafers, which are cut into the grid-like pattern you see on Everlight Solar’s panels. They are more cost-effective to manufacture than monocrystalline cells, which is why they are becoming the go-to choice in solar.

Click here to learn more about the difference between polycrystalline and monocrystalline cells.