Scrub the panels with a soft brush and gentle cleaner, like dish soap and water. Turn off the solar panel system. . Solar panels are a cornerstone of renewable energy, converting sunlight into electricity to power homes and businesses. However, their efficiency hinges on a clean surface. Dust, dirt, pollen, bird droppings, and other debris can reduce energy output by 15–25%, according to the National Renewable. . Keeping your solar panels clean is essential for getting the best out of your investment. But first, let's look at when and why you might need to invest in solar panel. .
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