When the Operator Builds the Plant: The Google–CFS Power Purchase Agreement and What It Means for Virginia's Energy Market
Documents the June 30, 2025 Google–CFS power purchase agreement and Eni's September 22, 2025 offtake for the 400-megawatt ARC fusion plant in Chesterfield County — the Fall Line Fusion Power Station. Not a technology profile; examines the commercial instruments themselves and the equity stakes both buyers hold in the developer.
Correction notice, 24 August 2026. Version 2.1 corrects the PJM capacity-price increase attributed to the Dominion zone. The 833 percent figure is the Rest-of-RTO increase ($28.92 to $269.92/MW-day). The Dominion zone rose from $28.92 to $444.26/MW-day, an increase of 1,436 percent. The prior-year figure of ~$47.60/MW-day does not appear in PJM’s auction report. It supersedes DOI 10.5281/zenodo.20679936, which remains available and citable.
This independent case study documents the power purchase agreements between Google, Eni, and Commonwealth Fusion Systems (CFS) for electricity from the planned 400-megawatt ARC fusion plant in Chesterfield County, Virginia, now named the Fall Line Fusion Power Station, and analyzes what operator-anchored generation means for the Commonwealth's energy market, ratepayer cost allocation, and data center infrastructure policy. It is not a technology profile. It examines the commercial instruments themselves: Google's 200 MW agreement of June 30, 2025, the Eni offtake of September 22, 2025 valued by the parties at more than $1 billion, and the equity stakes both buyers hold in the developer. The report treats the deals as a mechanism for buying down technology risk with reputational and balance-sheet capital, and keeps the contract and the physics in the same frame. It tracks the binding constraints on delivery across three independent clocks: the SPARC demonstration's net-energy-gain schedule, the federal and state permit stack, and CFS's April 2026 entry into PJM's reformed interconnection queue, the first such application by a fusion developer to a major grid operator. It situates the bet against Virginia's conventional-generation backdrop, including the GS-5 large-load rate class, the contested Chesterfield Energy Reliability Center gas plant, Dominion's resource planning, record PJM capacity auctions, and the proposed acquisition of Dominion Energy by NextEra. Written to age well whether ARC delivers in the early 2030s or never, it allocates risk among operator, developer, utility, and ratepayer, and flags the boundaries of the public record. Version 2.0 supersedes the March 2026 v1.7, incorporating the post-March record and converting the report to the series conventions. 39 pages; 72 endnotes.