Windanker
Iberdrola's third offshore wind farm in German Baltic Sea. Japanese utility Kansai acquired 49% stake December 2024. Project valued at EUR 1.28 billion.
Status
Under Constructionlifecycle stage
DeliveringHafrok completion outlook
Ownership
WGWindanker GmbH — 100% ◆
Location
GermanyBaltic Sea
Technology
Capacity
315 MW ◆
Turbines
21 × 15 MW ◆
Model
Siemens Gamesa SG 14-236 DD ◆
Foundation
Monopile ◆
Site & conditions
Site rights
Seabed rights held ∴
Origination
BNetzA Offshore Wind Auction 2021 (central model) · 2021 ·
Water depth
41–46 m ◆
Distance from shore
38 km ◆
Wind speed
10.0 m/s @ 150 m ≈
Revenue & grid
Offtake
PPA ◆
Grid
Secured ◆
Connection
50Hertz Ostwind 3: Jasmund offshore substation (OSS, installed … ◆
Schedule
FID
Jun 2024 ◆
COD · announced
2027 ◆
COD · Hafrok
2027 expected
Delivery outlook modelled by Hafrok · calibrated on delivered projects
2027
expected year of commercial operation
Chance of delivery
≈98%
estimated chance this project reaches commercial operation
Under Construction projects complete ≈97% of the time on Hafrok's record. A secured offtake contract lifts this one slightly; technical complexity pulls a little the other way.
COD outlook
If it completes, when — Hafrok’s probability by year (teal) · the developer’s COD guidance, by date stated (ink)
| Year | Probability |
|---|---|
| 2027 (expected) | 86.7% |
| 2028 | 13.3% |
| Stated | Announced COD |
|---|---|
| 2024-06-27 | 2026 |
| 2025-11-03 | 2026-Q4 (held since 2025-04-24, 2 statements) |
| 2026-06-10 | 2027 |
How Hafrok got this date
1
Starting point: the last dated milestone
Construction start in
2025. From there Hafrok adds how long similar projects (in established offshore-wind markets) took to reach commercial operation, measured on projects that have delivered.2
Typical timing
Starting point plus the typical remaining time gives a middle estimate of
2027; the faster quarter of similar projects would be done by 2026, the slower quarter not until 2028.3
Result
Expected commercial operation
2027, likely range 2026–2028 (the middle half of outcomes for similar projects). The developer's announced date falls inside that likely range, so the announced date is adopted.4
Year-by-year chart
The bars spread that estimate across years using how similar projects actually slipped against their dates — more often late than early, which is why the bars lean right.
5
Chance of delivery — separate from timing
Start from the share of Under Construction projects that went on to complete — ≈97%, measured on Hafrok's record of delivered and abandoned projects, with an allowance held back where that record cannot yet speak (projects still unresolved, changed market conditions). Based on the measured record — all 257 construction starts with a final outcome reached operation — adjusted down for projects still mid-build and for legal-challenge risk. Then adjust for this project's own evidence — offtake, market, size, technical complexity — to ≈98%, which rates it
Delivering on Hafrok's four-step delivery scale (Delivering · Expected · Prospective · Fragile).Project timeline & ownership verified milestones on the spine · ownership from Hafrok’s transactions record
Origination · 2021-09
BNetzA Offshore Wind Auction 2021 (central model)
- Awarded to
- RWE Renewables Offshore Development One GmbH
- Basis
- integrated tender
From the auction results — the round that created the project.
Farmdown · 2024-12
Iberdrola → Kansai Electric Power 49%
- Stake
- 49%
- Consideration
- €180m
- Announced
- 2024-12
- Closed
- 2025-04
- Project stage
- under construction
Iberdrola sold 49% to Kansai Electric Power. Iberdrola stated total project value EUR 1.28bn (total investment cost). Kansai's total commitment is ~49% of EUR 1.28bn (~EUR 627m), of which ~EUR 150m is upfront equity and the remainder (~EUR 477m) is construction capex commitment. The EUR 150m is therefore not a standalone equity purchase price but part of a larger capex- inclusive commitment. Zero-subsidy project (2022 German auction). Iberdrola retained 51%. COD expected Q4 2026. Context figures that are NOT consideration: EUR 1,280m whole-asset value (H1 2025), EUR 1.3bn Kansai co-investment framing (9M25 deck).
Evidence
- iberdrola.com ↗
- offshoreWIND.biz — Iberdrola to Sell Stake in 315 MW German Offshore Wind Farm to Japan's Kansai ↗ 2024-12-13 ◆ held
- Iberdrola — Iberdrola — gsm26 annual accounts consolidated 2025 ↗ 2025 ◆ held
From Hafrok’s transactions record
Dashed tick marks today (9 Sep 2026). The ▲ below the spine is the developer-announced COD. 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: slipped so far +1.0 yr (first announced 2026) · the full guidance history is in the delivery chart above
Revenue & offtake zero-bid award · bilateral offtake
Auction won at €0.00/MWh — no state price support
Award€0.00/MWh ◆
RoundBNetzA Offshore Wind Auction 2021 (central model) · Sep 2021
Awarded capacity300 MW
The award carries no state price support — revenue rests on bilaterally contracted offtake. Corporate PPA contracts are not yet recorded as structured data; the Revenue & offtake rows carry what the record's sources state.
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
Foundations19 of 21≈90% · first seen 2025-09-25
Turbines16 of 21≈76% · first seen 2025-12-22
Latest count2026-08-29from 221 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 (21 turbines + 1 platform); the table counts turbines only
foundationsturbines up (a substation top being set in place counts here too)
Satellite image
Image taken2026-09-07≈Copernicus Sentinel-1 radar satellite, northbound pass
Farm covered100%≈the whole farm lies inside the image
Structures ringed20 confirmed · 0 not yet confirmed≈as counted on 2026-08-29 · the image is newer than the count, so a bright spot without a ring may be a structure not yet counted
Construction ports
PortMukran ◆·marshalling · draft 13.5 m
Contains modified Copernicus Sentinel data 2026, processed by ESA and by Microsoft Planetary Computer.
Latest satellite radar image · 2026-09-07
a radar picture, not a photograph: the sea is dark, steel is bright · black is beyond the edge of the image
confirmed structure (20)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 substationJasmund·owner 50Hertz Transmission
Grid connection · ready in time?
when each part of the grid connection is due, against the start date the developer states (black line) and the year Hafrok expects (teal band) · 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 10 sources (5 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.
Regulator2
[1]
Bundesamt fuer Seeschifffahrt und Hydrographie (BSH)2025-01◆ Planfeststellungsbeschluss Offshore-Wind…
"Gegenstand des vorliegenden Planfeststellungsbeschlusses ist der OWP „Windanker“ bestehend aus 21 Windenergieanlagen (OWEA) und der parkinternen Verkabelung. Die Windenergieanlagen sollen auf Monopil…
supportsoperatorConsentTurbinesModelUnit capacity+5 more
[17]
Bundesnetzagentur — Marktstammdatenregister2026-08-23◆ Marktstammdatenregister (MaStR) offshore…
“Park row "OWP Windanker": 21 units, 315.0 MW gross, statuses {'In Planung': 21}, operators ['Windanker GmbH'], commissioned None..None, planned 2026-12-31..2026-12-31.”
supportsRegister entry
Operator1
[10]
Trade press7
[2]
[8]
[12]
[14]
offshoreWIND.biz2025-10-01
Press report — cited, not quoted; read it at the source link.
supportsOffshore constructionSvanen — foundation installation
[15]
[18]
offshoreWIND.biz2026-09-01◆ Iberdrola’s New German Offshore Wind Far…
Press report — cited, not quoted; read it at the source link.
supportsFirst power
[19]
offshoreWIND.biz2025-04-24◆ Iberdrola, Kansai Close EUR 1.28 Billion…
Press report — cited, not quoted; read it at the source link.
supports↳ parent