Google contracts for 3,590 MW of power from Constellation Energy in the US' largest power grid, with new nuclear energy accounting for ~25% of that supply
Context & Ripple Effects
Google has been assembling several ways to support data-center electricity demand: a 2024 agreement for Kairos Power small modular reactors, a 2025 arrangement tied to restarting the Duane Arnold plant, and demand-response agreements with five utilities. The Constellation contract adds large-scale grid supply to that portfolio.
The agreement couples a 3.59-GW power commitment with 890 MW of added nuclear capacity in PJM, according to Google and Constellation. It makes firm generation, rather than clean-energy procurement alone, a central part of Google’s infrastructure planning.
First-order effects
- Constellation receives a long-term buyer for 3.59 GW of supply, including demand associated with 890 MW of new nuclear capacity for the PJM grid.
- Google gains contracted power at a scale that can support its U.S. data-center load while its utility demand-response commitments can reduce consumption during grid peaks.
Second-order effects
- Other large data-center operators seeking capacity in PJM face a clearer signal that firm generation and long-duration utility contracts are becoming competitive inputs, not back-office energy purchases.
- PJM utilities and generators have greater incentive to pair new supply commitments with flexible-load programs, because Google is procuring both generation and peak-demand management.
Third-order effects
- If comparable contracts proliferate, power procurement will function more like infrastructure finance: creditworthy technology buyers can underwrite generation upgrades while securing scarce firm capacity.
- The pattern favors data-center expansion strategies built around contracted, dispatchable power and managed load rather than reliance on a single clean-power source.
The trend: Large cloud operators are turning electricity procurement into a blended strategy of firm generation contracts, nuclear development and flexible data-center demand.