(TNS) — The majority of the electricity that powers Ann Arbor’s city operations is generated by renewable energy sources, city officials announced Tuesday.

It comes after an additional 67 sites across the city were enrolled in a state program that allows customers to make their own choices about how their energy is generated, known as Michigan’s Electric Customer Choice Program, city officials said in an April 15 statement.

Now at a total of 74 city sites, just over 70% of Ann Arbor’s overall electricity usage for its operations is generated from renewable energy sources pulled off the grid, officials said. The city’s alternative energy supplier is Constellation Energy, the nation’s largest producer of carbon-free energy.

Solar at city facilities also generated almost 600 megawatt hours of additional electricity in 2024, officials said, noting it’s “a small but growing portion of overall usage.”

More than two megawatts of additional behind-the-meter solar systems are planned for city facilities, officials said. Behind-the-meter solar systems are those located on the customer’s side of the utility meter, including solar panels, battery storage, or energy-efficient appliances.

“Once you build momentum, it’s hard to slow down,” Simi Barr, senior analyst with the City of Ann Arbor Office of Sustainability and Innovations , said in a statement.

The city has also made “notable strides” electrifying “a significant portion” of its fleet of vehicles including electric refuse and bucket trucks, Barr added.

“Thanks to our work to produce and procure more renewable energy, we can proudly say that the city is actively implementing solutions that help to equitably address the climate crisis — and we are on track to do a lot more,” Barr said.

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