Solmar Insights
Amazon has entered into a 20-year power purchase agreement (PPA) with Constellation Energy to support the expansion and upgrade of the 1,790 MW Calvert Cliffs Clean Energy Center in Maryland. The deal will deliver 690 MW of nuclear capacity to Amazon, enable a plant relicensing, and underwrite more than $3 billion in infrastructure improvements, including an additional 190 MW of generating capacity by 2032.
Key figures
20-year PPA between Amazon and Constellation
$3 billion Maryland nuclear infrastructure investment
1,790 MW plant with 190 MW new capacity by 2032
690 MW nuclear power supply to Amazon
Deal structure and scope
The agreement between Amazon and Constellation is designed as a long-term PPA spanning two decades, providing the capital investment certainty necessary for a major upgrade to Maryland’s only nuclear plant. This structure ensures an offtaker for 690 MW of nuclear generation, including the 190 MW uprate yet to be constructed, cementing Amazon’s commitment as an anchor energy buyer in the PJM regional power market.
The $3 billion investment will fund both overhauls and site enhancements at Calvert Cliffs Clean Energy Center. Constellation, as the owner and the United States’ top nuclear energy producer, anticipates the PPA revenue certainty will facilitate securing a new federal operating license, extending the plant’s productive lifespan by another 20 years. These upgrades are expected to support continuous baseload clean power for both Amazon’s operations and regional grid customers well into the 2040s.
This deal moves beyond ordinary corporate renewables procurement by advancing nuclear plant uprating, a less common transaction model for commercial PPAs, which more frequently back new wind or solar builds.
Implications for Maryland and PJM grid
Calvert Cliffs’ expansion is particularly significant in Maryland, where it already stands as the state’s largest source of low-carbon energy. The agreement’s impact extends to the entire PJM interconnection, the nation’s largest organized power market, by reinforcing grid reliability and supplying an additional 190 MW of incremental nuclear capacity between 2030 and 2032.
All electricity produced at the Calvert Cliffs plant will continue to flow onto the PJM grid, maintaining established market operations while providing Amazon with equivalent energy credits through the PPA structure. This approach avoids the need for direct physical supply but guarantees additional clean capacity for the system as a whole, supporting corporate decarbonization goals alongside system reliability.
By directly financing new nuclear generation rather than relying solely on certificates or short-term supply agreements, Amazon is offering a template for high-volume energy buyers to meaningfully expand the grid’s clean power base, particularly in regions where wind and solar growth faces permitting or land constraints.
Amazon’s growing clean energy strategy
This deal exemplifies Amazon’s strategy to secure large-scale, clean, reliable power to meet its facility load growth, especially as e-commerce, logistics, and digital infrastructure needs rise. The company has already secured a separate retail supply agreement with Constellation to support its substantial energy demand across the 13-state PJM territory.
By locking in energy pricing at one of the PJM market’s core non-carbon resources, Amazon is setting cost certainty for decades and helping insulate its operations from wholesale market volatility. This approach also aligns with growing institutional and government expectations around supply chain decarbonization and corporate ESG disclosures.
Unlike renewable PPAs that can be variable and weather-linked, the nuclear-backed PPA offers Amazon 24/7 firm clean power. This secures continuous operations for data centers, fulfillment hubs, and other mission-critical facilities, enhancing the reliability of Amazon’s service infrastructure in the region.
Market signals and financing mechanics
Constellation’s decision to proceed with relicensing and site upgrades was substantially de-risked by Amazon’s long-term PPA commitment, which delivers transparent revenue over multiple regulatory cycles. The arrangement underscores the emerging role of creditworthy corporate offtakers as enablers for both plant life extensions and incremental new nuclear capacity projects.
The contract’s 20-year tenor is especially impactful for project and asset finance providers, as it not only underwrites capital outlays for modernization and expansion, but also signals continued institutional appetite for baseload clean energy offtake. In turn, this will likely influence future developer decisions regarding the economics of uprating, repowering, or extending other existing nuclear assets in ISO/RTO markets facing reliability needs and policy-driven decarbonization pressures.
For the PJM market more broadly, the Amazon-Constellation model could encourage additional high-load users to secure long-term supply directly with regulated or merchant generator counterparties, finally enabling deferred or stalled upgrades at existing nuclear plants to get underway with fewer merchant risk concerns.
What this means for buyers
Power and capacity buyers in PJM and Maryland will see over $3 billion in nuclear asset upgrades and a 190 MW expansion coming online by 2032. Long-term PPAs with creditworthy offtakers are shown to unlock relicensing and new capacity buildouts that might otherwise stall. Buyers can now pursue similar structures to secure clean baseload energy and manage pricing risk for large-scale digital or industrial projects in the next procurement cycle.
Reporting via the original publisher
