How long do solar panels last? A Solar panels typically have a lifespan of 25-30 years or more. However, their efficiency may gradually decrease over time. Most solar panel manufacturers offer warranties that guarantee a certain efficiency level for at least 20-25 years. admin2023-05-06T15:21:29+00:00May 6th, 2023| Share This Story, Choose Your Platform! FacebookTwitterLinkedInWhatsAppPinterestEmail