Stories
Why Your Solar Panels Are Losing Power and How Proper Cleaning Can Fix It
N
News18•14-10-2026, 14:44
Why Your Solar Panels Are Losing Power and How Proper Cleaning Can Fix It
- •Dust and debris accumulation, known as soiling, can significantly block sunlight and reduce solar panel electricity output by up to 30 percent in a month.
- •Using ordinary tap water leaves mineral deposits that hinder efficiency, making distilled or RO-treated water a better choice.
- •Avoid cleaning hot panels with cold water to prevent thermal stress, and schedule cleanings for early mornings or evenings.
- •Harsh scrubbing tools and chemical detergents can scratch or damage the glass, so soft microfiber cloths and gentle cleaning agents should be used instead.
- •Coastal areas with airborne salt, dusty environments, and regions near construction require more frequent and careful maintenance.
Key Questions Answered
Leaving solar panels uncleaned for a month can cause power generation losses to exceed 20% to 30% due to accumulated dust, dirt, and pollution.
Ordinary tap water contains dissolved minerals like calcium that leave white deposits on the glass after drying, which can block sunlight and reduce efficiency over time.
Solar panels should be cleaned in the early morning or evening to avoid thermal stress from pouring cold water on hot surfaces. It is also recommended to use distilled or RO-treated water with low mineral content, along with a soft microfiber cloth or squeegee, while avoiding harsh chemicals and abrasive scrubbers.
