What Happens to Your Solar Panel when Rain Hits? Solar panels are made up of a bunch of solar cells, and the main material used is silicon. When there is heavy rain or hailstorm, the protective glass covering the solar cells get damaged. This is the reason why you need to follow some preventive steps to protect solar panels from rain as well as other bad weather conditions. Protective Covering Rearrange your Panels Automate your Solar Panel Protection Hire a Professional At BSSE, we offer just that; due to the high-quality build and the great service we provide, our solar panels are guaranteed to stay productive for a long time to come.