The broad answer to that question is yes, but it's wise to understand the cleaning process in more depth than a simple yes or no. If loose dirt, sand, or sediment has started to accumulate in the grooves and nooks of your solar panels, it can gradually begin to impact their. A professional pressure washer in combination with a brush attachment or a roller brush and a telescoping wand are among the best ways to clean solar panels efficiently and ergonomically. With the right cleaning technique, it is possible to clean a solar panel area of up to 1,500 square. Ground-level solar panel cleaning is the practice of washing photovoltaic (PV) panels using extendable equipment, such as telescopic water-fed poles, without climbing onto the roof. This method is recommended by solar installers as the safest approach for homeowners and commercial property managers. Cleaning solar panels requires more caution than cleaning other surfaces. Clean early morning or evening when panels are cool. Never use a pressure washer, abrasive scrubber, or ammonia-based cleaner.