Amazon and Constellation Energy announced a 20-year power purchase agreement that will direct 690 MW from Maryland's Calvert Cliffs Clean Energy Center to Amazon, including 190 MW of new generating capacity expected online between 2030 and 2032. The deal enables over $3 billion in Maryland infrastructure investment and will allow Constellation to relicense the 1,790-MW plant for another two decades. Constellation, which describes itself as the largest nuclear energy company in the United States, said revenue certainty from the PPA supports new clean energy development at the site. Amazon Web Services VP Kerry Person said the agreement sustains the operation of Maryland's largest source of carbon-free energy, which currently generates roughly 80% of the state's clean energy and enough electricity to power approximately 1.3 million homes.
The deal is among the largest nuclear PPAs tied directly to data center demand, committing more than $3 billion to a single plant's expansion and relicensing. It adds 190 MW of new generating capacity to the PJM grid, the largest power grid operator in the U.S., setting a visible precedent for how hyperscalers can fund nuclear infrastructure upgrades to meet AI-driven energy needs.
A 20-year nuclear PPA between Amazon and Constellation Energy to expand an existing Maryland plant is a landmark clean-energy commitment by a major hyperscaler, distinct from the Google-Constellation deal and highly newsworthy for its duration and nuclear focus.