OpCore Montereau Data Center

Vernou-la-Celle-sur-Seine / La Grande-Paroisse, FrancePreconstruction

Contracted: 400 MW
Updated: Oct 28, 2026
Utility: EDF

OpCore is redeveloping the former EDF thermal-power site at Montereau-Fault-Yonne, France as a large data center campus. The program carries an investment of approximately €4 billion and a power subscription exceeding 400 MW, with an initial phase targeted for 2027. The 400 MW figure is contracted grid supply rather than operating IT load.

Capacity

Reported capacity

Planned / design or future potential

400 MW

Source

Capacity

Actual

400 MW

Source

Capacity basis

Actual

More than 400 MW contracted grid supply

Source

Operating IT capacity: Not established in published records

A missing figure does not mean zero. Planned, utility and generation figures are not operating IT capacity.

Development

Development programAnnounced or preconstruction

OpCore Montereau Data Center: Development program.

Milestones (2)

OpCore Montereau Data Center — Development program

Nov 17, 2025 · Event timing type not established

In progress · Announced

Source not linked

OpCore is redeveloping the former EDF thermal-power site at Montereau-Fault-Yonne, France as a large data center campus.

Date not disclosed · Event timing type not established

In progress · Status changed

Source not linked

Participants

OpCore

Developer

Sources by role

Developer (1)

EDF and OpCore to develop a high-power data center at Montereau · Nov 17, 2025 · Primary

Other participants (1)

EDF

Utility provider

Sources by role

Utility provider (1)

EDF and OpCore to develop a high-power data center at Montereau · Nov 17, 2025 · Primary

Capital & incentives

Capital claims and financing records may overlap. Their amounts are not added together.

Capital claims

Development scale

Actual

OpCore is redeveloping the former EDF thermal power site at Montereau-Fault-Yonne, France as a large data center campus. The program carries an investment of approximately €4 billion and a power subscription exceeding 400 MW, with an initial phase targeted for 2027

Source

Financing records

Investment commitment

€4,000,000,000

Jul 24, 2025

Planned Montereau redevelopment investment.

Parties & sources

OpCore (Sponsor)

Sources (2)

EDF and OpCore to develop a high-power data center at Montereau · Nov 17, 2025
EDF 2025 half-year results · Jul 24, 2025

Site & development

Location context

Actual

Former Montereau thermal power plant site | Seine et-Marne | France

Source

Location

Actual

Technical details (2)

Utility service

Planned or represented

400 MW

More than 400 MW contracted grid supply

Site facility

Planned or represented

The 400 MW figure is contracted grid supply rather than operating IT load.

Public-source research. Plans may change. See Evidence for sources and qualifications.