Introduction
Solar panels are a long-term investment in clean energy, but to maintain their efficiency, regular cleaning is essential. Unfortunately, many homeowners make mistakes during the cleaning process, which can damage panels or reduce their performance. In this article, we’ll highlight the top 10 mistakes to avoid when cleaning solar panels—and what you should do instead.
1. Using Harsh Cleaning Chemicals
Many people assume stronger cleaners mean better results. However, using harsh chemicals like bleach or ammonia can damage the protective coating of solar panels.
👉 Do this instead: Use plain water or a mild biodegradable soap.
2. Cleaning Panels During Peak Sun Hours
Washing panels when the sun is strong can cause thermal shock—the sudden change in temperature may crack the glass.
👉 Do this instead: Clean early in the morning or late afternoon when panels are cool.
3. Using Abrasive Tools (Scrub Brushes or Steel Wool)
Scratching the glass surface can permanently reduce efficiency.
👉 Do this instead: Use a soft sponge, microfiber cloth, or a rubber squeegee.
4. Walking on Solar Panels
Some homeowners step on panels to reach hard-to-clean areas. This can crack cells and void warranties.
👉 Do this instead: Use a long extension pole with a soft brush attachment.
5. Ignoring Safety Precautions
Climbing on rooftops without proper gear can be dangerous.
👉 Do this instead: Always wear non-slip shoes, use safety harnesses, or hire professionals for rooftop cleaning.
6. Using Hard Tap Water
Tap water with high mineral content (hard water) can leave white stains and mineral deposits on panels.
👉 Do this instead: Use deionized water or rainwater for streak-free results.
7. Neglecting Regular Maintenance
Waiting too long between cleanings can cause dirt, pollen, or bird droppings to harden, making cleaning more difficult and less effective.
👉 Do this instead: Clean panels every 3–6 months depending on your environment.
8. Forgetting to Turn Off the System
Cleaning while panels are live may expose you to electric shocks.
👉 Do this instead: Always turn off the system before cleaning.
9. Using Pressure Washers
High-pressure water jets can damage seals and wiring.
👉 Do this instead: Use a low-pressure hose with a gentle spray.
10. Skipping Professional Cleaning
DIY cleaning works for light dust, but professional cleaning ensures safety and deeper care.
👉 Do this instead: Hire a solar panel cleaning service once a year for inspection and maintenance.
Conclusion
Avoiding these common mistakes will extend the lifespan of your solar panels and maximize their efficiency. Whether you choose DIY cleaning or hire professionals, safe and correct practices ensure you get the best return on your solar investment.
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