Study: Solar power fastest growing utility generation source

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Washington, D.C., April 17, 2012 — In 2011, utilities interconnected more than 62,000 photovoltaic systems of all sizes, according to new findings by the Solar Electric Power Association.

These new systems resulted in almost 1,500 MW of new utility solar power capacity, more than twice as much as was added in 2010, which itself had been a record year. Both the number of systems and the percentage of growth make solar electricity the fastest growing electric source in the U.S. in 2011.

Much of this growth took place not just in the Southwest, traditionally the leader in solar power, but also in eastern states, and it took place on the systems of municipal utilities and rural electric cooperatives, as well as investor-owned utilities.

The findings of SEPA‘s annual Utility Solar Rankings survey identify the most active utilities in the country based on the amount of new solar power they added to their systems, and on the amount of new solar power relative to the number of customers they serve.

Altogether, the Top 10 utilities reported adding more than 1,000 MW of solar electricity capacity in 2011. Overall, more than 240 utilities surveyed reported nearly 1,500 MW of new solar, equivalent to about six natural gas power plants.

For the fourth straight year, Pacific Gas & Electric, in northern California, led all utilities in the most new solar energy added to its grid with 288 MW. A New Jersey utility, Public Service Electric & Gas Co., secured the No. 2 spot with 181 MW in 2011. It took at least 45 MW to make the Top 10 list in 2011, more than double the minimum amount needed the previous year. Other highlights from the survey:

Four East Coast utilities earned spots in the Top 10 for new solar energy added, showing that solar power is spreading far beyond its original concentration in the southwestern part of the U.S.

In 2011, public power utilities returned to the Top 10 after none made it in 2010, with Sacramento Municipal Utility District and Long Island Power Authority ranking Nos. 7 and 9 respectively.

For the first time, a New Mexico utility made the Top 10 list, with Southwestern Public Service (Xcel Energy-NM) jumping from the No. 56 spot in 2010 to No. 10 in 2011.

On a watts-per-customer basis, Vineland Municipal Electric Utility (NJ) took the top spot.

A newcomer to the Top 10 list, the New Jersey municipal utility ranked first nationally with an unprecedented 769 watts-per-customer after integrating about 19 MW of PV for their nearly 25,000 customers.

Blue Ridge Mountain Electric Membership Corp. and Fayetteville Public Utilities jumped up the list, ranking Nos. 2 and 3 respectively. Blue Ridge Mountain EMC is the sole rural electric cooperative utility in either of this year’s Top 10 lists.

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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

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