The 19-Percent Efficient Solar Panel with Proven Shingled Cell Design Delivers Superior Power, Reliability, Value and Savings Compared to Conventional Panels MELBOURNE, Australia: SunPower Corporation (NASDAQ: SPWR) today launched the 19-percent efficient Performance solar panel for homeowners in Australia, available in several designs up to 325-watts. Backed by SunPower’s industry-leading 25-year warranty covering both power […]