What is Solar Panel Lifespan and What Wears Out First?

Solar panels are built for the long haul, typically providing reliable clean energy for 25 to 30 years without moving parts that might suddenly fail. Rather than a total shutdown, modern panels experience a minor median degradation of only about 0.5% per year, meaning they still operate at roughly 88% capacity even after two and a half decades of use. While the panels themselves are incredibly durable, homeowners should plan for a standard solar inverter replacement around the 10-to-15-year mark, as this hard-working electronic “engine” usually wears out before the glass.