 In a similar deal inked in January 2008, RSOL purchased Carlson Solar, headquartered in Hemet, California for $3.2 million in cash and stock.In August 2008, Real Goods Solar completed its third acquisition — Santa Cruz, California-based Independent Energy Systems for $3.6 million.In October 2008, RSOL completed its fourth acquisition in less than a year by acquiring Regrid Power of Campbell, California in a deal valued at $3.8 million in cash and stock.