Why are solar panels blue?
If you’ve noticed a neighbor’s roof with solar panels, or just seen pictures of panels, you might notice that they’re very often distinctly blue in color. Why is that? The color of solar panels depends on the type of silicon, the type and thickness of anti-reflective coatings, and the surface texture of the silicon cell. In general, polycrystalline (also known as multicrystalline) solar panels are usually blue, while monocrystalline panels are black.