CaliSolar has developed a proprietary approach to using "dirty" metallurgical grade silicon to make high quality solar cells. Upgraded Metallurgical Silicon (UMG Si) is substantially less expensive than the electronic grade silicon usually used to make solar cells. Since the company's founding, we have developed our ingot, wafer and cell processes to the point where we are producing cells demonstrating marketable levels of efficiency using UMG Si. We have headquarters in Sunnyvale California and a development facility in Berlin Germany. The company was founded in March 2006 and the first round of financing was completed in June 2006 when Advanced Technology Ventures and Globespan Capital Partners invested $9 million.
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