Under a partnership with Constellation Energy, Amazon has committed to drawing on nuclear-generated power for the next 20 years, with the arrangement expected to channel more than $3 billion into grid and generation infrastructure at a time when electricity consumption is on the rise.
Under the 20-year arrangement disclosed by the two companies on Wednesday, Constellation's Calvert Cliffs Clean Energy Center in Maryland would supply 690 megawatts of electricity, with a capacity addition of around 190 megawatts slated to enter service sometime between 2030 and 2032. A retail electricity supply agreement between the two companies extends coverage to Amazon's operations throughout the 13-state PJM market.
According to both parties, the deal is expected to give Amazon a way to keep power expenses in check across its network of facilities in the area. Securing predictable income over the long term also stands to benefit Constellation as the company pursues a two-decade licence extension for its Calvert Cliffs facility. Operating under licences that run to 2034 for one unit and 2036 for the other, both reactors at the facility remain authorised to generate power within those timeframes.
Growing electricity demand from data centres and AI processing — a field where Amazon holds a notable position — has steered technology firms toward nuclear power, whose continuous round-the-clock generation addresses the reliability gap that weather-dependent sources leave open.
Amazon has also made commitments to nuclear power through a $500 million funding stake in advanced-reactor developer X-energy, alongside a separate arrangement with Energy Northwest centred on bringing small modular reactors online in Washington state.
The electricity produced at Calvert Cliffs — Maryland's sole nuclear facility, with a generating capacity of up to 1,790 megawatts, enough to supply the equivalent of more than 1.3 million homes — will feed into the broader PJM regional grid rather than travel on a dedicated line to Amazon properties. Constellation's Joe Dominguez, serving as chairman, president, and chief executive, noted in a statement that the arrangement reflects how private capital can support energy infrastructure, that Amazon's involvement helps secure the plant's long-term operation across future generations, and that it lays groundwork for further investment in both the facility and in advanced nuclear technologies.
Employing more than 800 workers, the plant sits at the heart of a long-term supply arrangement between Amazon Web Services and Constellation. Kerry Person, who oversees AWS Global Operations and Data Center Delivery, described the deal as designed to preserve and expand Maryland's largest carbon-free power source, bring additional generation onto the regional grid, and protect the hundreds of positions tied to the site's ongoing output.
