Your roof keeps the rain off your head. It’s one of the most important components of your house, and an expensive thing to replace. When you get a new roof, you want to make sure that your investment is protected. But installing solar panels on a pitched roof involves drilling dozens of holes right into the roof. Sounds scary, doesn’t it? First of all, it’s recommended that you don’t install solar panels on a roof that has 10 or fewer years of life left in it.