Amazon and Constellation Partner for Major Expansion of Maryland Nuclear Plant

Amazon has entered into a 20-year power purchase agreement (PPA) with Constellation Energy to expand Maryland’s only nuclear plant, the Calvert Cliffs Clean Energy Center. The deal, announced on October 5, 2026, will support over $3 billion in infrastructure improvements, including renovations at the 1,790-MW facility, which is the state’s largest source of clean energy. The agreement will also enable around 190 MW of new generating capacity, expected to come online between 2030 and 2032.

Under the agreement, Amazon will receive 690 MW of power from the nuclear plant, including the 190 MW uprate. Constellation, the largest producer of clean energy and nuclear energy company in the U.S., stated that the investment and revenue certainty from the PPA will allow it to relicense the plant for another two decades. This extension will support the development of new clean energy power plants at the site and enhance Maryland’s supply of carbon-free energy.

Amazon has also entered a separate retail supply agreement with Constellation to support its operations in the 13-state PJM market, the largest power grid operator in the U.S. The deal will help Amazon manage its energy costs for facilities located in the region. Kerry Person, Amazon Web Services vice president of global operations and data center delivery, noted that the agreement sustains the continued operation and expansion of Maryland's largest source of carbon-free energy, supports hundreds of jobs, and brings significant new generation to the regional grid.

The Calvert Cliffs plant generates roughly 80% of Maryland’s clean energy, producing enough electricity to power approximately 1.3 million homes. Constellation has recently inked similar deals with companies like Walmart and Meta, reflecting a growing trend of businesses turning to nuclear energy to achieve their sustainability goals.