Dec. 14, 2020
Determining how many years a solar panel will last can take, well, years. Intended to function for 25 years or more, solar panels must be made to withstand the elements. In some cases, panels continue working well after their planned operational lifetime. Nowhere is this more evident than on the sunny hillside in Golden, Colorado, where the National Renewable Energy Laboratory (NREL) operates the Outdoor Test Facility (OTF).