Last year was a record year for solar in the United States. The overall solar market grew 30% over 2013 and accounted for one-third of all new generating capacity in the U.S., second only to natural gas.

The overall solar market grew 30% over 2013 and accounted for a third of all new generating capacity in the U.S. Source: EdisonAccording to a new ranking from the Solar Electric Power Association (SEPA), Pacific Gas & Electric integrated the most new solar capacity in 2014. The California utility installed more than 1,500 megawatts (AC) of solar in its service territory.

California’s two other investor-owned utilities—Southern California Edison and San Diego Gas & Electric—ranked No. 2 and No. 3. Duke Energy Progress and National Grid rounded out the top five spots.

Utilities on the top 10 list for annual solar capacity additions accounted for 72% of all new solar interconnections to the grid last year. In the fourth quarter, utilities installed a record 1.5 gigawatts (DC) of solar.