Source: Ranked no. 1 in the "PV Module Durability Initiative Public Report", Fraunhofer ISE, Feb 2013. Campeau, Z. et al. "SunPower Warranty Review, Feb 2013."
SunPower panels average only 0.25% power loss per year over the first 25 years.
Source: Jordan, Dirk “SunPower Test Report”, NREL, Apr 2015; Campeau, Z. et al. "SunPower Module Degradation Rate", SunPower white paper, 2013.
One out of every 20,000 panels has been returned under warranty.
Source: Hasselbrink, E., et al. "Validation of the PVLife Model Against 3 Million Module-Years of Live Site Data." 39th IEEE PVSC, Tampa, Florida, 2013.
SunPower predicts its panels will have a useful life of more than 40 years.
Source: "SunPower Module 40 Year Useful Life", SunPower white paper. Feb 2013. Useful life is 99 out of 100 panels operating at more than 70% of rated power.
SunPower panels ranked no. 1 in Fraunhofer durability testing.
Source: "Fraunhofer PV Durability Initiative for Solar Modules: Part 2". Photovoltaics International, 2014
SunPower utility-scale power plants with on-site O&M staff deliver more than 99% availability.
Source: BEW/DNV Engineering, "Availability Evaluation Report", Jan 2013. Requires on-site O&M staff.