Top 10 utilities by megawatts, watts-per-customer for installed solar electricity capacity

The Solar Electric Power Association (SEPA) named the top 10 U.S. electric utilities that added the most new solar power to their systems and the most solar on a watts-per-customer basis in 2012. This annual ranking, which identifies the companies that are integrating solar into the nation’s power grid, is part of the sixth annual Utility Solar Rankings report. The report identifies leading solar industry trends such as total installed capacity, market share and industry growth rates.

Utilities ranking in this year’s Top 10 by Solar Megawatt accounted for 73 percent of all capacity integrated in 2012, an increase from 2011. Among the top three in the megawatt rankings are Pacific Gas and Electric Co., Southern California Edison and Public Service Electric & Gas Co. Rounding out the megawatt list are Arizona Public Service, NV Energy, Jersey Central Power & Light, Tucson Electric Power Co., Progress Energy Carolinas, Sacramento Municipal Utility District and Hawaiian Electric Co. All were ranked in 2011 with the exception of Progress Energy Carolinas, which is in its first year on the list. Pacific Gas and Electric Co. tops the list for the fifth year.

“We are pleased at this significant recognition from SEPA and at the ongoing success of our efforts to help our customers enjoy the benefits of solar,” said Steve Malnight, vice president for customer energy solutions at PG&E. “We remain committed to providing our customers with energy that is clean, reliable, affordable and safe.”

The SEPA Top 10 Solar Watts-Per-Customer rankings take into account the number of customers each utility serves relative to their solar megawatts installed, giving small utilities a more competitive opportunity to measure solar energy capacity.

Leading the Solar Watts-Per-Customer rankings are many municipal utilities including the city of St. Mary’s, Ohio; Kauai Island Utility Co-op in Hawaii; and Bryan Municipal Utilities in Ohio. The Ohio utilities previously were not ranked, and Kauai moved up from No. 12 in the 2011 ratings. The remaining top 10 providers include Hawaiian Electric Co., Chickasaw Electric Co-op, Maui Electric Co., Imperial Irrigation District, Tucson Electric Power Co., city of Napoleon and Vineland Municipal Electric Utility.

“Utility companies across the nation are embracing clean energy solutions and showing their commitment to a more diverse energy portfolio improving the environment,” said Julia Hamm, president and CEO of SEPA. “We are impressed with the sheer number of new utilities that  have moved into the top 10 lists, particularly those who have never been ranked in the past and are now adopting solar as part of their energy mix, increasingly so as the price of solar power declines year over year.”


Watts per Customer


Annual W/Customer

City of St Mary’s/City of St Mary’s Municipal Electric System


Kauai Island Utility Cooperative


Bryan Municipal Utilities


Hawaiian Electric Co.


Chickasaw Electric Cooperative


Maui Electric Company Ltd.


Imperial Irrigation District


Tucson Electric Power Co.


City of Napoleon/Napoleon Light & Power


Vineland Municipal Electric Utility



Megawatts (MW)


Annual Capacity (MW)

Pacific Gas and Electric Co.


Southern California Edison


Public Service Electric & Gas Co.


Arizona Public Service


NV Energy




Tucson Electric Power Co.


Progress Carolinas


Sacramento Municipal Utility District


Hawaiian Electric Co.


 Click here for report


Previous articleMartin, Chivukula to co-chair CSG Energy & Environment Committee
Next articleHouse to vote on Public Power Risk Management Act
The Clarion Energy Content Team is made up of editors from various publications, including POWERGRID International, Power Engineering, Renewable Energy World, Hydro Review, Smart Energy International, and Power Engineering International. Contact the content lead for this publication at

No posts to display