Spray the panels with a hose to remove loose dirt and debris. Turn off the solar. . This guide shows you how to clean solar panels safely and effectively—backed by expert tips and the latest best practices for DIY and professional options. How Often Should You Clean Solar Panels? What Happens If You Never Clean Solar Panels? Solar panels use photovoltaic (PV) cells to capture. . Solar panels are a great way to use renewable energy in your home, but they get dirty over time. While natural rainfall helps rinse away some dirt and debris, relying solely on it may not be enough—especially if you live in certain environments. If they get dirty or build up layers of grime and dust over time, those pollutants and particles will prevent your panels from absorbing as much sunlight as possible.
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