## C8 Solar System Lifespan

Question

Why did the Energy Commission use a lifespan of 30 years for PV panels instead of 25 years?

Answer

The National Renewable Energy Laboratory (NREL), SunPower, Solar City, and other manufacturers support a 30-year or longer lifespan for PV panels. Although most panel warranties through the manufacturers are 20 to 25 years, the expected lifespan is longer. A warranty and the lifespan of a panel are not the same thing.