The Smart Electric Power Alliance (SEPA) has announced its annual Top 10 lists recognizing the U.S. utilities that added the most new solar and storage to the grid in 2017. Compiled as part of SEPA’s 11th annual Utility Market Survey, the lists include the top utilities in four categories: new solar megawatts and watts per customer, and new storage megawatts and watts per customer.

On the solar megawatts list, Pacific Gas and Electric (PG&E) regained the No. 1 spot this year with 831.3 MW, while Southern California Edison (SCE), last year’s No. 1, was second with 547.1 MW. Rounding out the top five are No. 3 Xcel Minnesota (522.3 MW), No 4 Duke Energy Progress in North and South Carolina (355.4 MW) and No. 5 Xcel Colorado (318.8 MW).

The town of Madison, Maine took the top spot on the watts per customer list, with 1,819.6 watts per customer (W/C), followed by Xcel Energy (Texas and New Mexico) with 1,582.6 W/C. Nine of the Top 10 utilities on the solar watts per customer list are small municipals or electric cooperatives. Joining Madison on the list are No. 3 Anza Electric Cooperative in California (1,455.5 W/C), No. 4 Clarksville Light and Water in Arkansas (1,202.1 W/C), and No. 5 Pickwick Electric Cooperative in Tennessee (1,195.9 W/C).

On the Utility Storage Top 10, SCE ranked No. 1 on new megawatts, with 56.2 MW, while the Kauai Island Utility Cooperative (KIUC) was No. 1 in new storage watts per customer, with 415.3 W/C. The Top 10 lists for storage - both megawatts and watts per customer - show growth still centered in the Southwest and Hawaiian markets, which have high levels of solar. Several utilities in these regions appear on both storage lists, including, SCE, KIUC, Tucson Electric Power and San Diego Gas & Electric.

According to SEPA, this year’s Utility Solar Top 10 lists are based on data provided by 423 utilities, representing around 114 million customers across the United States. The Storage Top 10 lists draw on data from 169 utilities, representing 70.7 million customers.