Amazon signs 20-year deal to keep Maryland's largest nuclear plant running and expand it
The agreement with Constellation Energy will add about 190 megawatts at Calvert Cliffs and support more than $3 billion in infrastructure investment.
Amazon will buy 690 megawatts of power from the Calvert Cliffs nuclear plant in Maryland under a 20-year agreement with Constellation Energy that lets the plant's owner relicense it for another two decades and expand its output.
The power purchase agreement, reported Oct. 1 by Kenny Fisher in ESG Today, will fund upgrades across the 1,790-megawatt plant, which produces about 80% of Maryland's carbon-free electricity. The upgrades will add about 190 megawatts of new capacity between 2030 and 2032, and Constellation said the deal will enable more than $3 billion in infrastructure investment in the state.
The companies also signed a retail supply agreement covering Amazon's operations across the mid-Atlantic grid region that spans 13 states and the District of Columbia.
"This agreement demonstrates how private investment can strengthen critical energy infrastructure," Constellation President and Chief Executive Joe Dominguez said.
The deal is the latest in a series of nuclear agreements as Amazon looks beyond renewables to meet its 2019 pledge to match all its electricity use, including data centers, with renewable energy by 2030. The company contracted 10.22 gigawatts of clean energy in 2025, one of the largest totals of any corporate buyer, according to the research firm BloombergNEF.
Kerry Person, vice president of global operations and data center delivery at Amazon Web Services, said the deal "brings significant new generation to the regional grid."
This brief is based on reporting by Kenny Fisher, published Oct. 1, 2026, in ESG Today. Read the original: https://www.esgtoday.com/amazon-signs-20-year-deal-with-constellation-to-upgrade-extend-life-of-nuclear-plant/
This article was produced with the assistance of AI tools and reviewed by an editor before publication.
