Meta has cut a trio of deals to power its artificial intelligence data centers, securing enough energy to light up the equivalent of about 5 million homes.

The parent company of Facebook on Friday announced agreements with TerraPower, Oklo and Vistra for nuclear power for its Prometheus AI data center that is being built in New Albany, Ohio. Meta announced Prometheus, which will be a 1-gigawatt cluster spanning across multiple data center buildings, in July. It’s anticipated to come online this year.

Financial terms of the deals with TerraPower, Oklo and Vistra were not disclosed.

The Mark Zuckerberg-led Meta said in a statement on Friday that the three deals will support up to 6.6 gigawatts of new and existing clean energy by 2035. A single gigawatt, according to a general industry standard for utilities, can power about 750,000 homes.

“These projects add reliable and firm power to the grid, reinforce America’s nuclear supply chain, and support new and existing jobs to build and operate American power plants,” the company said.

Meta said its agreement with TerraPower will provide funding that supports the development of two new Natrium units capable of generating up to 690 megawatts of firm power with delivery as early as 2032. The deal also provides Meta with rights for energy from up to six other Natrium units capable of producing 2.1 gigawatts and targeted for delivery by 2035.

Meta will also buy more than 2.1 gigawatts of energy from two operating Vistra nuclear power plants in Ohio, in addition to the energy from expansions at the two Ohio plants and a third Vistra plant, Beaver Valley, near Pittsburgh, Pennsylvania.

The deal with Oklo, which counts OpenAI’s Sam Altman as one of its largest investors, will help to develop a 1.2 gigawatt power campus in Pike County, Ohio, to support Meta’s data centers in the region.

The nuclear power agreements come after Meta announced in June that it reached a 20-year deal with Constellation Energy to secure power from its nuclear plant in Clinton, Illinois.