How Long Do Solar Panels Last? (2024 Guide) – MarketWatch

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Yes, all solar panels lose efficiency over time due to their normal panel degradation rate. High-quality solar panels with higher efficiency rates will degrade slower than cheaper models with lower efficiency rates. Your solar installer will outline your solar panels’ expected longevity and estimates for their efficiency drops. Your installer may include additional coverage to repair or replace your panels if they drop below a certain output. 

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