Top 5 Mistakes to Avoid When Cleaning Solar Panels
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Solar panels are a valuable investment, helping you save on energy bills and reduce your environmental footprint. To keep them performing at their best, regular cleaning is essential—but cleaning them the wrong way can cause costly damage.
Here are the top five mistakes to avoid when cleaning solar panels, and what to do instead.
1. Using a Pressure Washer
It might seem like the quickest way to blast off dirt and grime, but high-pressure water can:
- Crack or chip the glass surface.
- Damage seals and let water into the panel.
- Void your manufacturer’s warranty.
Better option: Use a low-pressure garden hose with clean, deionized water to gently rinse panels.
2. Cleaning Panels in Direct Sunlight
Washing panels under strong sunlight can cause the water to evaporate quickly, leaving behind streaks and mineral deposits. This can block sunlight and reduce efficiency.
Better option: Clean panels in the early morning, late afternoon, or on a cool, overcast day.
3. Using Harsh Chemicals or Abrasive Tools
Strong detergents, bleach, or abrasive scrubbers can scratch the glass coating or damage the anti-reflective layer.
Better option: Use a mild, non-abrasive soap and a soft sponge or brush with an extension pole.
4. Skipping Safety Precautions
Solar panels are often located on rooftops, making cleaning a risky job. Climbing ladders or walking on wet surfaces without proper equipment can lead to falls or injury.
Better option: Wear non-slip shoes, use a stable ladder, and consider hiring a professional if your panels are hard to reach.
5. Neglecting Regular Maintenance
Waiting too long between cleanings can allow dirt, bird droppings, and pollen to build up, reducing efficiency by up to 20%.
Better option: Clean panels at least twice a year—or more often if you live in a dusty area or near trees and birds.
Key Takeaway
Your solar panels work hard every day—treat them with care. By avoiding these common cleaning mistakes, you’ll protect your investment, maintain peak energy output, and extend the life of your system.
When in doubt, hire a professional who specializes in solar panel maintenance. They have the right tools, safety equipment, and expertise to get the job done right.