SunPower once again holds the record for the world's most efficient rooftop solar module, achieving an NREL-validated 24.1 percent.
NREL scientist Keith Emery, manager of the PV cell and module performance laboratory, provided the verdict in a release: "The module measured 11310.1 cm2 (aperture area) and had a power of 272.5 watts. We recorded 24.1 percent efficiency, which is a new record for silicon module efficiency."
The record SunPower module was made "using laboratory solar cells of 25 percent mean efficiency" and is based on its commercially available module architecture. In February, NREL verified that a SunPower production panel had hit 22.8 percent efficiency.