Solar panels are generally low-maintenance, but keeping them clean can help maintain peak efficiency. Over time, dirt, pollen, bird droppings, and other debris can accumulate on the surface, blocking sunlight and reducing output. The need for cleaning depends on your location. Areas with minimal rain or lots of dust, pollen, or nearby trees typically require more frequent cleaning than regions with regular rainfall.

A good rule of thumb is to inspect your panels visually every few months. If you notice visible buildup or if your solar monitoring system shows a steady decline in production unrelated to weather, it may be time to clean. Typically, once or twice a year is enough for most systems, but seasonal variations or specific site conditions may require adjustments to that schedule.

Cleaning can be done with a soft brush, mild soap, and water. Avoid abrasive materials and harsh chemicals, as they can damage the panel surface. For higher or hard-to-reach installations, it's best to hire a professional cleaning service with experience in solar systems to ensure safety and prevent damage. Regular cleaning helps your system run efficiently and extends the life of your investment.