Cleaning solar panels is essential for maintaining their efficiency and longevity. The process involves removing dirt, debris, and other contaminants that accumulate on the panel's surface, which can reduce the amount of sunlight they absorb. For washing solar panels, start by turning off the system and checking the manufacturer's guidelines for cleaning instructions. Using a soft brush or sponge and non-abrasive soap, gently scrub the surface of the solar panel with water.