Iles d'Yeu et de Noirmoutier
AO2 (second French offshore call for tenders) project awarded June 2014. Fourth offshore wind farm commissioned in France.
Status
Operationallifecycle stage
Ownership
Ocean Winds — 40% ◆SCSumitomo Corporation — 29.5% ◆
AGAllianz Global Investors — 20.25% ◆
Banque des Territoires — 9.75% ◆VEVendee Energie — 0.5% ◆
Location
Northeast Atlantic
Technology
Capacity
496 MW ◆
Turbines
61 × 8 MW ◆
Model
Siemens Gamesa SG 8-0-167 DD ◆
Foundation
Monopile ◆
Site & conditions
Site rights
Seabed rights held ∴
Origination
France Offshore Wind Round 2 (AO2) · 2014 ·
Water depth
19–36 m ◆
Distance from shore
11.6 km ◆
Wind speed
8.4 m/s @ 100 m ≈
Revenue & grid
Offtake
FiT · AO2 · €167/MWh ◆
Grid
Secured · 2023 ◆
Connection
RTE (Reseau de Transport d'Electricite) double submarine export … ◆
Schedule
FID
Apr 2023 ◆
COD
Apr 2026 ◆
Project timeline & ownership verified milestones on the spine · ownership from Hafrok’s transactions record
Origination · 2014-05
France Offshore Wind Round 2 (AO2)
- Awarded to
- Engie + EDP Renewables + Banque des Territoires
- Basis
- integrated tender
From the auction results — the round that created the project.
Farmdown · 2018-12
EDP Renewables → Sumitomo Corporation 13.5%
- Stake
- 13.5%
- Consideration
- €21.4m
- Implied 100% value
- €159m
- Implied
- €0.33m / MW
- Announced
- 2018-12
- Project stage
- consented
ENGIE and EDPR signed an alliance with Sumitomo Corporation for the development of two French offshore wind projects: Dieppe-Le Tréport and Îles d'Yeu et de Noirmoutier. As part of this alliance, EDPR sold 13.5% stakes in each of the two projects to Sumitomo. The combined reported consideration was approximately EUR 42.8 million across both projects (EUR ~21.4m per project, pro-rata by capacity). Post-transaction ownership of Îles d'Yeu et Noirmoutier: ENGIE 31%, EDPR 29.5%, Sumitomo 29.5%, Banque des Territoires 10%. The project structure was held via Eoliennes en Mer des Îles d'Yeu et de Noirmoutier (EMYN). The EUR 42.8m figure was reported by Renewables Now and covers both projects combined; per-project split is estimated pro-rata and is approximate. Vendée Energie subsequently acquired a small capital participation in October 2022.
Evidence
- engie.com — Newsroom Engie : Find here all our press releases, articles, photos, videos ↗ 2018-12 ◆ held
- renewablesnow.com — UPDATE - EDPR sells stake in French offshore wind project for EUR 43m - Offshore Wind News ↗ 2018-12 ◆ held
- offshoreWIND.biz — Sumitomo Joins French Offshore Wind Duo ↗ 2018-12 ◆ held
From Hafrok’s transactions record
Farmdown · 2025-10
Ocean Winds → Allianz Global Investors 20.25%
- Stake
- 20.25%
- Consideration
- €200m
- Implied 100% value
- €988m
- Implied
- €2.02m / MW
- Announced
- 2025-10
- Closed
- 2025-12
- Project stage
- operational
Ocean Winds sold a 20.25% stake in the îles d'Yeu & Noirmoutier offshore wind farm to Allianz Global Investors for an equity value of EUR 200 million. The implied enterprise value is EUR 5.6 million per MW (EUR 2,731m at 100% implied equity basis), however the EUR 200m / 20.25% implies an equity value of EUR 988m at 100%, which translates to EUR 2,025k/MW at 488 MW — consistent with the operational range. Allianz cited the project's 20-year fixed inflation-linked feed-in tariff as a key investment rationale. First power was generated in June 2025 and the project was in ramp-up at announcement. The deal was announced October 21, 2025 and completed December 22, 2025. Post-transaction ownership: Ocean Winds 40%, Sumitomo 29.5%, Allianz GI 20.25%, Banque des Territoires 9.75%, Vendée Energie 0.5%. The EV/MW figure of EUR 5.6m/MW cited in press releases uses enterprise value (including project debt) rather than equity value; the equity-only implied value per MW shown here uses the pure equity calculation (EUR 200m / 20.25% = EUR 988m equity, divided by 488 MW).
Evidence
- offshore-energy.biz — Ocean Winds sells stake in 500 MW French offshore wind farm to Allianz for €200 million ↗ 2025-10 ◆ held
- offshoreWIND.biz — Ocean Winds Completes Minority Stake Sale in îles d'Yeu & Noirmoutier to Allianz ↗ 2025-10 ◆ held
- edpr-investors.com — Ocean Winds sells minority stake in its 500 MW îles d’Yeu et Noirmoutier offshore project ↗ 2025-10 ◆ held
From Hafrok’s transactions record
Dashed tick marks today (9 Sep 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: 2025→2026-04 · 2 recorded revisions · slipped +0.8 yr (first announced 2025)
Revenue & offtake contract duration and price levels · money of the day
496 MW contracted — tender award
● Tender award · France Offshore Wind Round 2 (AO2)
Price€137/MWh ·Capacity496 MWAwardedMay 2014Term20 yrs
Installation how the build is going · from satellite counts and Hafrok’s registers
Satellite installation tracker
counted from satellite radar images · a structure standing in the sea on a given date, not a turbine producing power · a guide, not a sourced fact
Installation · counted from satellite
Foundations61 of 61≈100% · first seen 2024-06-08
Turbines61 of 61≈100% · first seen 2024-06-16
Latest count2026-08-30from 482 satellite passes · 1 substation platform left out so the counts compare with the turbine number · anything first seen in the last 60 days is not yet confirmed
Hafrok counts foundations and turbines from satellite radar images (≈): a structure is counted once it is seen standing in the sea, which is not the same as producing power. A structure first seen in the last 60 days is not yet confirmed, because on a single image a freshly set foundation and a ship holding position look alike. Substation platforms are left out so the counts compare with the number of turbines. Rows marked with a dot (·) come from Hafrok’s own registers; a supplier or contract appears only where a source states it — everything else reads “not recorded”, never guessed.
Structures standing over time · count
strong line = confirmed · light line = seen in the last 60 days, not yet confirmed · the chart counts every structure (61 turbines + 1 platform); the table counts turbines only
foundationsturbines up (a substation top being set in place counts here too)
Satellite image
Image taken2026-09-05≈Copernicus Sentinel-1 radar satellite, northbound pass
Farm covered100%≈the whole farm lies inside the image
Structures ringed62 confirmed · 0 not yet confirmed≈as counted on 2026-08-30 · the image is newer than the count, so a bright spot without a ring may be a structure not yet counted
Construction ports
PortNantes-Saint Nazaire Port ◆·marshalling · quay 780 m · crane 600 t · draft 14 m
PortPort of Brest ◆·pre-assembly · quay 400 m · crane 200 t · draft 10.6 m
Contains modified Copernicus Sentinel data 2026, processed by ESA and by Microsoft Planetary Computer.
Latest satellite radar image · 2026-09-05
a radar picture, not a photograph: the sea is dark, steel is bright · black is beyond the edge of the image
confirmed structure (62)seen recently, not yet confirmed (0)probably a substation platform (a larger structure than a turbine; the register above has the facts)farm boundary

Grid connection
from Hafrok’s substation, converter and cable registers
Offshore platforms · 1
Offshore substationIles d'Yeu et de Noirmoutier Offshore Substation·in service 2025 · owner Ocean Winds (ENGIE / EDPR joint venture) — 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
17/18 fields verified · rests on 18 sources (10 primary) · ◆ 7 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.
Regulator1
[4]
Prefecture of Vendee (French State)2018-12
“AP n18-DDTM85-721 (October 29, 2018) marine usage authorization. AP n18-DDTM85-789 (December 19, 2018) environmental authorization with detailed annexes. AP n18-DDTM85-722 and AP n18-DDTM85-723 (Octob…”
supportsConsentConsent granted
Operator8
[1]
Ocean Winds2026◆ Yeu-Noirmoutier - Ocean Winds
“488 MW annual power generation equivalent to serving approximately 800,000 people (roughly the Vendee department's population). 95% of Tier 1 suppliers based in Europe and over 50% sourced directly fr…”
supportsBackground
[2]
Eoliennes en Mer Iles d'Yeu et de Noirmoutier (EMYN)2026
“61 eoliennes d'une puissance de 8 MW chacune pour une puissance totale de 496 MW. Situe a 11,7 km de l'ile d'Yeu et 16,5 km de l'ile de Noirmoutier.”
supportsTurbinesUnit capacityTotal capacityDistance from shore
[3]
Eoliennes en Mer Iles d'Yeu et de Noirmoutier (EMYN)2026
“State tender (appel d'offres) awarded June 2014. Developer: Eoliennes en Mer iles d'Yeu et de Noirmoutier (EMYN). Public debate: April 24 to July 31, 2015. Public inquiry: April 4 to May 23, 2018. Con…”
supportsBackground
[5]
Ocean Winds2023-04-06◆ Iles d’Yeu and Noirmoutier offshore wind…
“FID Date April 6, 2023. Administrative authorisations were obtained in 2018; appeals lifted early 2023. Construction start Summer 2023 (offshore operations). Investment approximately 2.5 billion EUR. …”
supportsConsentFinal investment decisionOnshore constructionOffshore constructionStatus+2 more
[6]
ENGIE2023-04-06
“FID Date April 6, 2023. Capacity approximately 500 MW. Construction start April 2023. Ownership Ocean Winds (60.25%), Sumitomo Corporation (29.5%), Caisse des Depots et des Consignations (9.75%), Vend…”
supportsMechanismStrike / priceDetail
[9]
Ocean Winds2026-04-29◆ Ocean Winds completes final turbine inst…
“Final Turbine Installation Date 29 April 2026. Full Operational Status achieved as of 29 April 2026 (transitioned from construction phase). Turbine Count 61 turbines. Progressive Operation Start June …”
supportsCommercial operationCOD history
[13]
EDP2025-12-17
“Ocean Winds has completed the sale of a 20.25% stake in the iles d'Yeu & Noirmoutier 500 MW offshore wind farm to Allianz Global Investors. Updated shareholder structure: OW (40%), Allianz (20.25%), S…”
supportsMechanismStrike / priceDetail
[18]
DGEC — Ministère de la Transition écologique (eoliennesenmer.fr)2026-08-25◆ French Eoliennes en mer register (DGEC),…
“Register node 860 (node--type-project) at /facades-maritimes-en-france/facade-nord-atlantique-manche-ouest/iles-d-yeu-et-noirmoutier — title "Iles d'Yeu et de Noirmoutier"; page text 2521 chars, hash …”
supportsRegister entry
Auction results1
[19]
CRE (Commission de regulation de l'energie) / DGEC2013◆ fr-ao2-cahier-des-charges
AO2 cahier des charges (18 Feb 2013): Lot 1 Le Treport 500 MW, Lot 2 Yeu-Noirmoutier 500 MW.
supportsTender award · France Offshore Wind Round 2 (AO2)
Trade press8
[7]
offshoreWIND.biz2025-05-12
Press report — cited, not quoted; read it at the source link.
supportsModelFoundation
[8]
offshoreWIND.biz2025-06-04
Press report — cited, not quoted; read it at the source link.
supportsFirst power
[10]
Actualites News Environnement2026
“Le 29 avril 2026, les 61 turbines du parc des iles d'Yeu et de Noirmoutier sont entrees en service. 496 MW installes. Le contrat d'obligation d'achat conclu avec EDF s'etablit a 167 EUR/MWh, apres la …”
supportsTotal capacityMechanismStrike / priceDetail
[11]
Energies de la Mer2019-05-02
“AO 02 (Second Call for Tenders) Won in June 2014. Capacity 496 MW. Turbines 61 Siemens Gamesa units at 8 MW each. Foundation Type Monopile. Location 11.7 km from Port-Joinville; 16.5 km from L'Herbaud…”
supportsWater depth
[12]
Energies de la Mer2025-01-20
“Port of Saint-Nazaire pre-assembly site for wind turbine components and storage hub before offshore installation. Received blades and nacelles from Siemens Gamesa (cargo ship Rotra Vente, January 16 2…”
supportsmarshallingpre-assembly
[15]
The Wind Power2026-05◆ Noirmoutier (France) - Wind farms - Onli…
Press report — cited, not quoted; read it at the source link.
supportsCoordinates
[16]
[17]