Several years ago, SunPower, a unit of Cypress Semiconductor, (CY) realized the top metal plate was reflecting the sun’s rays, cutting efficiency by reducing the percentage of sunlight converted to electricity. So the company decided to put both plates beneath the silicon. It now has an industry-high efficiency of 22% vs. an average of 16%, says analyst Dan Ries of Monness, Crespi Hardt & Co. That means fewer panels are needed to produce power, shaving installation costs and making systems more affordable for homes, which have smaller roofs than most commercial buildings.
SunPower, which says it will earn about $90 million on $740 million in sales this year, expects its prices to be competitive with grid power by 2012, says Vice President Julie Blunden.