The 19-Percent Efficient Commercial Solar Panel with Proven Shingled Cell Design Delivers Superior Power, Reliability, Value and Savings Compared to Conventional Panels SAN JOSE, Calif.: In October 2018, SunPower (NASDAQ: SPWR) acquired the SolarWorld Americas facility in Hillsboro, Oregon, making good on its commitment to invest in American manufacturing. Just four months later, SunPower is assembling its high-quality 19-percent efficient […]