Polycrystalline Solar Panel in Thanjavur Sri Saravanas Agencies A polycrystalline solar panel, also known as a multi-crystalline solar panel, is a type of photovoltaic (PV) module made from multi-crystalline silicon solar cells. It was once the most common type of solar panel globally, particularly in the residential and commercial sectors, due to its cost-effectiveness. The manufacturing process for polycrystalline silicon cells differs significantly from monocrystalline cells. While polycrystalline panels have played a crucial role in the initial growth of solar power in India, the industry is rapidly moving towards more efficient and advanced monocrystalline technologies for future deployments.