Google's AI Buildout Needs More Power. It Just Locked in a Massive Additional Amount.

Constellation's Clinton Clean Energy Center in Illinois. Google has signed a long-term power deal with the company that includes new nuclear capacity from reactor upgrades. (Credit: Getty Images)

Google has struck a long-term power agreement with Constellation Energy covering nearly 3.6 gigawatts of electricity in the PJM grid, including 890 megawatts of new nuclear capacity from upgrades to existing reactors.

The 20-year power purchase agreement will support upgrades at 11 Constellation-owned nuclear units in Illinois, Pennsylvania and New Jersey, according to a joint Google and Constellation announcement Tuesday.