Amazon and Constellation have signed a 20-year power purchase agreement to support expanding a nuclear plant in Maryland. The deal gives Amazon a long-term supply of carbon-free electricity, likely for its data center operations, and helps Constellation finance the plant expansion. It is another sign that large tech companies are moving beyond renewable PPAs and locking in firm, zero-carbon generation. The expansion still needs regulatory approval, and the construction timeline will determine when the new capacity actually comes online. If it proceeds on schedule, the project adds baseload clean power to a grid that is increasingly strained by new data centers and electrification. The 20-year term also gives financiers the revenue certainty needed to fund nuclear projects, which have high upfront costs but decades of low-carbon output. This deal matters because it shows nuclear is competing alongside solar, wind, and storage in corporate procurement portfolios. It also raises questions about how regulators count nuclear in state clean energy standards, and whether similar PPAs can help keep existing reactors running while new capacity is built.
