Petaluma, California [RenewableEnergyAccess.com] Borrego Solar, Inc. has opened its third office in California to meet its expanding residential and commercial client needs throughout the state. The new office in Petaluma augments offices located in San Diego, Berkeley and San Jose. On July 12, in addition to a ribbon-cutting ceremony, Borrego Solar is offering a free educational Solar Seminar; a second seminar will be held July 24. (To RSVP, call 707-220-8316.) The company has also opened an office in Massachusetts to serve the Northeastern U.S.