To more easily remove tree sap or oily residue, consider using isopropyl alcohol and a microfiber towel. Do not use cleaning detergents, as these can potentially damage the solar panel's glass or leave unwanted residue. . Isopropyl alcohol, commonly known as rubbing alcohol, is a versatile solvent widely used for cleaning and disinfecting surfaces. While isopropyl alcohol is generally considered safe for use on glass, it does. . FAQ 1: What concentration of isopropyl alcohol is safe for cleaning solar panels? FAQ 2: Can I use regular tap water to dilute the alcohol? FAQ 3: How often should I clean my solar panels? FAQ 4: Will cleaning my solar panels myself void my warranty? FAQ 5: Is it better to clean solar panels in the. . When cleaning glass with isopropyl alcohol, use a 70–91% solution for ideal grease removal and quick evaporation. This prevents streaks and smears. Optional Use a small amount of mild soap, warm water, and a soft brush, cloth or rag to clear your panels of debris. Poorly maintained panels may lose up to 25% of their efficiency, according to the National Renewable Energy Laboratory (NREL).
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