Quick Answer
Power washing solar panels is not recommended as it can cause damage to the panels, especially if done at high pressures. Water and detergent can seep into the panel's crevices and harm the electrical connections. Low-pressure cleaning with a soft brush and water is a safer option.
Risks of Power Washing Solar Panels
Power washing solar panels at high pressures can cause damage to the panels’ frame, glass, or electrical connections. High-pressure washes can also dislodge dirt and debris from the panels, but the risk of damage outweighs the benefits. Water and detergent can seep into the panel’s crevices and harm the electrical connections, reducing the panel’s efficiency and lifespan.
Safe Cleaning Techniques for Solar Panels
The International Electrotechnical Commission (IEC) recommends cleaning solar panels using low-pressure water, typically between 15-25 psi, with a soft-bristled brush to remove dirt and debris. Avoid using high-pressure washes, abrasive materials, or strong detergents, as they can damage the panels. For tough stains, mix a mild dish soap with water and apply it to the affected area using a soft-bristled brush.
Additional Considerations for Solar Panel Cleaning
When cleaning solar panels, ensure the surface is completely dry before reassembling any components. Avoid cleaning solar panels in direct sunlight or during extreme temperatures. Regular cleaning is essential to maintain optimal solar panel efficiency, but it should be done safely and with the right techniques to avoid damaging the panels. The National Renewable Energy Laboratory recommends cleaning solar panels every 6-12 months, depending on the location and environmental conditions.
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