Spray the panels with a hose to remove loose dirt and debris. Dust, dirt, pollen, bird droppings, and other debris can reduce energy output by 15–25%, according to the National Renewable. . The space beneath solar panels is susceptible to accumulating organic debris like leaves, pine needles, and dust, alongside nesting materials from birds and rodents. This buildup creates a significant fire hazard, especially on homes with composition shingle roofs, which are at a higher risk due to. . Many homeowners are surprised to learn that dirty solar panels can reduce energy output by up to 25%. Even a thin layer of dust, pollen, or grime can quietly cost hundreds of dollars a year in lost production. The difference may not be. .
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