Nordsee One
Originally developed by ENOVA Energieanlagen GmbH (later Innogy Nordsee 1 GmbH); 85% stake acquired by Northland Power in September 2014, with RWE Innogy (now RWE Offshore Wind GmbH) retaining 15%.
Status
Operationallifecycle stage
Ownership
Northland Power — 85% ◇
RWE — 15% ◇Location
GermanyNorth Sea
Technology
Capacity
332 MW ◆
Turbines
54 × 6.15 MW ◆
Model
Senvion 6 2m126 ◆
Foundation
Monopile ◆
Site & conditions
Site rights
Seabed rights held ∴
Water depth
26–35 m ◆
Distance from shore
40 km ◆
Wind speed
9.9 m/s @ 100 m ≈
Revenue & grid
Offtake
Premium ◆
Grid
Secured · 20 Dec 2017 ◆
Connection
DolWin2 (DolWin beta) HVDC, TenneT; offshore substation 33kV to … ◆
Schedule
FID
19 Mar 2015 ◆
COD
20 Dec 2017 ◆
Project timeline & ownership verified milestones on the spine · ownership from Hafrok’s transactions record
Acquisition · 2014-09
RWE → Northland Power 85%
- Stake
- 85%
- Consideration
- not disclosed
- Announced
- 2014-09
- Closed
- 2016-01
- Project stage
- pre-FID
Northland Power acquired 85% from RWE Innogy; RWE retained 15%. Deal bundled Nordsee Two and Nordsee Three development rights. Total construction cost ~EUR 1.2bn. Consideration undisclosed.
Evidence
- northlandpower.com ↗
- evwind.aeeolica.org — Northland Power Acquires Majority Equity Stake in North Sea Offshore Wind Power Farms From RWE Innogy | REVE News of the wind sector in Spain and in the world ↗ 2014-09 ◆ held
From Hafrok’s transactions record
Dashed tick marks today (13 Oct 2026). Ownership 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: 2017-Q4→2017-12-20 · 2 recorded revisions · held within the year (first announced 2017-Q4, latest 2017-12-20)
Revenue & offtake the regime the project was built under
Offtake regime on record
RegimeThe farm company's FY2018 accounts state that it has sold its power by direct marketing under the EEG since April 2017 (direct marketer in 2018: Uniper Energy Sales), and that an EU NER300 grant of EUR 70m is paid as 1.54 ct/kWh on the 2018-2022 output. Northland said in November 2025 that the EEG support steps down in 2027 and that a five-year PPA with Shell for about one third of output starts in June 2027.
Instrumentmarket premium
A built project sells its power under the contract or support regime it was financed with; it is not expected to bid into new government offtake rounds. Where the record does not yet name that regime, the row says so rather than guessing.
Installation how the build is going · from sourced statements and Hafrok’s registers
Installation complete
Installation · on record
StageOperational
In operation since2017-12-20
Offshore construction2016 → 2017-12-20
Construction ports
PortEemshaven ◆·turbine assembly and load out · quay 5000 m · crane 50 t · draft 14 m
Grid connection
from Hafrok’s substation, converter and cable registers
Offshore platforms · 2
Offshore substationNordsee One 155 kV offshore substation·155/33 kV · in service 2016 · owner Nordsee One GmbH (wind farm owner; farm-owned platform)
HVDC systemDolWin2·916 MW · ±320 kV · in service 2017-06 · shared with Gode Wind 1
Converter supplierHitachi Energy (contracted as ABB; ABB Power Grids sold to Hitachi 2020)·DolWin2 · Drydocks World – Dubai (construction); Aibel design and project management, outfitting/commissioning at Haugesund, Norway · for TenneT
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 13 sources (12 primary) · ◆ 8 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)2012-04-04◆ Genehmigungsbescheid Offshore-Windpark N…
“Auf den Antrag der Innogy Nordsee 1 GmbH (zum Zeitp unkt der Antragstellung: ENOVA Energieanlagen GmbH) [...] 1. Gegenstand dieser Genehmigung sind 54 (vierundfün fzig) WEA einschließlich Nebenanlagen…”
supportsConsentTurbinesWater depthDistance from shoreCoordinates+2 more
[12]
Bundesnetzagentur — Marktstammdatenregister2026-08-23◆ Marktstammdatenregister (MaStR) offshore…
“Park row "Nordsee One": 54 units, 332.1 MW gross, statuses {'In Betrieb': 54}, operators ['Nordsee One GmbH'], commissioned 2017-03-30..2017-09-26, planned None..None.”
supportsRegister entry
Operator7
[3]
Northland Power Inc.2017-03-31◆ Nordsee One Offshore Wind Project Achiev…
“the first wind turbine installed on the 332 MW offshore wind farm has successfully started to generate power. Nordsee One is owned by Northland (85%) and Innogy SE (15%).”
supportsFirst power
[4]
Northland Power Inc.2017-12-21◆ Northland Power's Nordsee One Offshore W…
“the 332 MW Nordsee One offshore wind farm achieved final completion on December 20th, 2017. The project was completed on schedule and under its total budget of EUR1.2 billion. All 54 turbines have bee…”
supportsCommercial operationCOD history
[6]
Nordsee One GmbH2024◆ Nordsee One Wind Farm Technology | Advan…
“Foundations The wind turbines were installed on monopiles with transition pieces. [...] There are 54 Senvion SE 6.2M126 Wind Turbine Generators ( WTGs) in operation at the Nordsee One offshore wind fa…”
supportsTurbinesModelUnit capacityTotal capacityFoundation+2 more
[7]
Nordsee One GmbH2024
“Nordsee One GmbH is based in Oststeinbek (Germany) and is 85% owned by Northland Power Inc. and 15% owned by RWE.”
supportsBackground
[8]
Northland Power Inc.2025-11-18◆ Nordsee One Offshore Wind Farm Signs A 5…
“announced the signing of a five-year bilateral Power Purchase Agreement ( “PPA” ) with Shell Energy Europe Ltd (“ Shell ”) for approximately one‑third of the production from its 332 megawatt Nordsee O…”
supportsMechanismDetail
[9]
Northland Power Inc.2025
“54x Senvion 6.15 MW turbines. 332 MW capacity. Completed...ahead of schedule and under budget in December 2017. Power contract with feed-in-tariff subsidy for approximately ten years under the German …”
supportsCommercial operationTurbinesUnit capacityTotal capacityMechanism+1 more
[13]
Bundesanzeiger2018-12-31◆ Nordsee One GmbH, Oststeinbek - Jahresab…
“Die N1 vermarktet seit April 2017 den produzierten Strom durch Direktvermarktung nach dem Erneuerbare-Energien-Gesetz (EEG). Die Direktvermarktung erfolgte 2018 über den Dienstleister Uniper Energy Sa…”
supportsMechanismDetail
Trade press3
[2]
Offshore Energy2015-03-19◆ Nordsee One Reaches Financial Close - Of…
Press report — cited, not quoted; read it at the source link.
supportsFinal investment decisionTurbinesUnit capacityTotal capacity
[5]
Power Technology2017
Press report — cited, not quoted; read it at the source link.
supportsOnshore constructionOffshore constructionSite rightsTurbinesModel+5 more
[11]
Encyclopaedic1
[10]