Solar panels require little maintenance in order to function. The only thing they need is a periodic light cleaning to make sure dirt, leaves, and other debris aren’t obstructing the sun’s rays. If your panels are tilted, rainfall actually clears away debris that’s accumulated on them. However, during the dry season or extended periods without rain, it’s important to clean them manually. It is recommended that you perform solar panel cleaning between two and four times per year with a leaf blower or a garden hose.