Saint-Brieuc
75 km2 area. Three-legged steel jacket foundations. Jackets assembled at Port of Brest.
FranceTechnology
Capacity
496 MW ◆
Turbines
62 × 8 MW ◆
Model
Siemens Gamesa SG 8-0-167 DD ◆
Foundation
Jacket ◆
Site & conditions
Site rights
Seabed rights held ∴
Origination
France Offshore Wind Round 1 (AO1) · 2012 ·
Water depth
32–41 m ≈
Distance from shore
16 km ◆
Wind speed
8.5 m/s @ 100 m ≈
Revenue & grid
Offtake
FiT ◆
Grid
Secured · May 2024 ◆
Connection
Two 225kV subsea export cables to Caroual beach (Erquy); … ◆
Schedule
FID
May 2020 ◆
COD
May 2024 ◆
Project timeline & ownership verified milestones on the spine · ownership from Hafrok’s transactions record
Origination · 2012-04
France Offshore Wind Round 1 (AO1)
- Awarded to
- Ailes Marines (Iberdrola)
- Basis
- integrated tender
Founding JV · 2012-01
Iberdrola · Avel Vor — The Saint-Brieuc offshore wind farm was awarded to Ailes Marines SAS in the French Round 1 tender (AO1) in April 2012. The original consortium comprised Iberdrola (70%) and Avel Vor (30%), a special purpose vehicle jointly owned by RES Group (the original site developer) and Caisse des Dépôts et Consignations (subsequently Banque des Territoires). No consideration was exchanged; this was a tender consortium formation. Iberdrola held the majority stake and acted as lead developer throughout the development phase. The project spent approximately 8 years in development and legal challenge before reaching financial close.
Evidence
- iberdrola.com — Iberdrola increases offshore wind ambition in France acquiring 100% of the capital of Ailes Marines ↗ 2020-03 ◆ held
- offshoreWIND.biz — Iberdrola Takes Full Ownership of French Offshore Wind Farm ↗ 2020-03 ◆ held
From the auction results — the round that created the project; founding JV from Hafrok’s transactions record.
Acquisition · 2020-03
Avel Vor (RES Group / Banque des Territoires) → Iberdrola 30%
- Stake
- 30%
- Consideration
- not disclosed
- Announced
- 2020-03
- Project stage
- pre-FID
Iberdrola acquired the remaining 30% of Ailes Marines SAS from Avel Vor, the special purpose vehicle jointly held by RES Group and Banque des Territoires (formerly Caisse des Dépôts et Consignations). The acquisition gave Iberdrola 100% ownership of Ailes Marines SAS and control over the Saint-Brieuc project, enabling it to take FID and commence construction in 2021. RES Group sold its equity stake at the FID stage, which is consistent with its business model as a development-stage wind originator. No consideration was publicly disclosed. Project investment was approximately EUR 2.4 billion in total. Final Investment Decision (FID) was taken in 2020 following this acquisition. First power December 2023; fully commissioned May 2024.
Evidence
- iberdrola.com — Iberdrola increases offshore wind ambition in France acquiring 100% of the capital of Ailes Marines ↗ 2020-03 ◆ held
- offshoreWIND.biz — Iberdrola Takes Full Ownership of French Offshore Wind Farm ↗ 2020-03 ◆ held
- renewablesnow.com — Iberdrola becomes sole owner of 496-MW French offshore wind project - Offshore Wind News ↗ 2020-03 ◆ held
From Hafrok’s transactions record
Dashed tick marks today (13 Oct 2026). The teal diamond on the spine is origination — the seabed award or round that created the project. Every other ownership event lives in the band below: one station per recorded deal, dated at its label, in deal order rather than to calendar scale. Secondary trades appear only at the interchanges; grey lines are parties whose entry or exit Hafrok’s record does not hold.
Announced-COD history: 2023→2023→2024-05 · 3 recorded revisions · slipped +0.9 yr (first announced 2023)
Revenue & offtake contract duration and price levels · money of the day
496 MW contracted — tender award
● Tender award · France Offshore Wind Round 1 (AO1)
Price€155/MWh ·Capacity496 MWAwardedApr 2012Term20 yrs
Installation how the build is going · from sourced statements and Hafrok’s registers
Installation complete
Installation · on record
StageOperational
In operation since2024-05
Offshore construction2021-05 → 2024-05
Construction ports
PortPort of Brest ◆·assembly · quay 400 m · crane 200 t · draft 10.6 m
PortPort of Lézardrieux ◆crew transfer
Grid connection
from Hafrok’s substation, converter and cable registers
Offshore platforms · 1
Offshore substationSaint-Brieuc Offshore Substation·225 kV · in service 2022 · owner Ailes Marines (100% Iberdrola Group) — the producer, NOT RTE
Grid connection · ready in time?
when each part of the grid connection is due, against the start date the developer states (black line) · a bar spans the whole year, quarter or month the source gives
installed or in serviceexpected deliveryearlier date that was later moved
Sources & verification
Rests on 16 sources (7 primary) · ◆ 6 documents held
◆Verified≈Modelled◇Sourced∴Inferred⌁Convention○Unverified∅No source·Derived
Numbers are stable citation ids — grouped by source class, so they are not consecutive.
Operator3
[2]
[14]
[18]
DGEC — Ministère de la Transition écologique (eoliennesenmer.fr)2026-08-25◆ French Eoliennes en mer register (DGEC),…
“Register node 855 (node--type-project) at /facades-maritimes-en-france/facade-nord-atlantique-manche-ouest/saint-brieuc — title 'Saint-Brieuc'; page text 1968 chars, hash 76669635fb992693…. Identifyin…”
supportsRegister entry
Auction results1
[24]
Commission de régulation de l'énergie / DGEC (published by the CPDP Courseulles)2026-10-13◆ fr-ao1-cahier-des-charges-full
Full AO1 cahier des charges (appel d'offres n. 2011/S 126-208873). 6.9: by T0 + 24 months the winner gives the prefect the draft authorisation applications; valid applications filed by T0 + 30 months;…
supportsTender award · France Offshore Wind Round 1 (AO1)
Trade press12
[1]
[3]
[5]
[6]
[7]
Power Technology2024
Press report — cited, not quoted; read it at the source link.
supportsTurbinesModelUnit capacityTotal capacityDistance from shore
[8]
Energies de la Mer2021-01-29
“AO 01 … premier appel d'offres lancé en 2011 … ministerial decree of April 6, 2012 designating Ailes Marines as the winner … 62 turbines of 8 MW each … total power of 496 Megawatts … Ailes Marines (Ib…”
supportsMechanismDetail
[10]
Renewables Now2020-05-29◆ SGRE locks order for 496-MW Saint-Brieuc…
Press report — cited, not quoted; read it at the source link.
supportsFinal investment decision
[11]
Energies de la Mer2018-06-25
“Parc de Saint-Brieuc : le nouvel arrêt a été signé … Prefect of Côtes-d'Armor signed a new decree on June 21, 2018, regularizing the initial decree … the April 18, 2017 decree approving the convention…”
supportsConsentConsent granted
[13]
The Wind Power2026-05◆ Saint-Brieuc (France) - Wind farms - Onl…
Press report — cited, not quoted; read it at the source link.
supportsCoordinates
[15]
[16]
[23]
L'Info Durable (AFP)2021-08-06◆ Eolien en mer: retard dans les travaux d…
Copyrighted source — cited, not quoted; read it at the source link.
supportsOffshore construction