State of the grid for data centers in France — October 2026

In October 2026, the binding constraint for data centers in France is grid access, not energy. Reserved transmission capacity far exceeds consumption, queue rules are changing, and local opposition is spreading to battery storage. This monthly report gathers the latest public figures, with sources.

1. RESERVED CAPACITY FAR EXCEEDS CONSUMPTION

Over 200 heavy industry and data center projects have secured transmission access, totalling 33 GW, including about 18 GW for some 80 data center projects. Meanwhile, the 471 data centers using over 1 GWh a year consumed 4.3 TWh in 2024, about 1 to 1.5% of French electricity, and connected sites use on average about 20% of their contracted capacity. That gap explains the ongoing queue reform.

PARIS REGION FOCUS: A 7 GW QUEUE

According to RTE, about 7 GW of projects were in the connection process in the Paris region in Q1 2026, roughly half of regional peak consumption; 97.5% of contracted capacity is for data centers. The funnel is steep: 114 exploratory studies, 47 queued projects with an accepted PTF (5.8 GW), but only 12 signed connection agreements (1.2 GW). The six data centers already in operation use under 20% of their contracted capacity. RTE plans two 400 kV reinforcements and a shared connection zone south-east of Paris, approved by the CRE in May 2025. See our detailed analysis.

2. THE RULES ARE CHANGING

Queue: RTE is preparing a move from "first come, first served" to "first ready, first served", expected from 1 January 2027; the procedure approved in February 2026 already requires proof of progress at queue entry and every year. National interest: since the 27 May 2026 law, the prefect can move certain data centers up the queue where congestion exceeds five years, until 10 March 2027. Unused capacity: for agreements signed since 1 August 2025, RTE can reduce the capacity of under-using sites. HTB3 fast track: three to four years targeted for 400 MW to 1 GW on State-identified sites.

3. EQUIPMENT, LOCAL CHALLENGES, EUROPE

Power transformers run about 20–32 months from second-tier European makers and 48–60+ from majors; HV/MV switchgear commonly 18–36 months (our tracker). Hitachi Energy also signed €350M of framework agreements with Enedis to secure transformer supply (our analysis). Our observatory follows about ten contested data center files and five battery storage projects. The European Commission adopted an A–G rating scheme on 21 September 2026, with a consultation on minimum performance standards until 14 December; per-site data confidentiality is under challenge before the Aarhus Convention committee, according to Politico.

KEY TAKEAWAYS

Next edition: November 2026. See our grid connection glossary.

Sources: RTE (2025 annual results, Bilan prévisionnel 2025, connection procedures), CRE deliberations (2025-193, 2026-32, 2026-173), SDES (data center electricity consumption in 2024, July 2026), RTE (presentation at L'Institut Paris Region webinar, May 2026, Q1 2026 data), pv magazine (28 September 2026), European Commission (delegated regulation C(2026) 3472), Orrick analysis published by DatacenterDynamics (August 2026), regional and national press for local challenges. Figures are rounded; every project is specific.

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