Solar panels don't make your house hotter and actually help keep your house cooler by reflecting some of the sun's heat away from the roof. Impact on Home Temperature. . Since solar panels reflect heat produced by the sun, you can expect solar panels to reduce the heat absorption of your roof by up to 38%, resulting in a 5-degree temperature drop versus homes without solar panels. Their installation might even result in reducing the heat transferred to your home. . For solar panel owners in warmer climates, it's important to understand that the hot weather will not cause a solar system to overheat – it will only slightly affect your solar panel's efficiency.
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