Borkum Riffgrund 1
Located 55km NW of German coast, 40km NNW of Borkum. Developed by DONG Energy (now Ørsted).
Status
Operationallifecycle stage
Ownership
Ørsted — 50% ◆GRGreencoat Renewables PLC — 50% ◆
Location
GermanyNorth Sea
Technology
Capacity
312 MW ◆
Turbines
78 × 4 MW ◆
Model
Siemens Swt 4-0-120 ◆
Foundation
Monopile ◆
Site & conditions
Site rights
Seabed rights held ∴
Water depth
24–30 m ◆
Distance from shore
55 km ◆
Wind speed
9.9 m/s @ 100 m ≈
Revenue & grid
Offtake
Premium ◆
Grid
Secured · 2015 ◆
Connection
TenneT DolWin alpha HVDC (±320 kV DC; ~130 km offshore cable to … ◆
Schedule
FID
2011 ◆
COD
Oct 2015 ◆
Project timeline & ownership verified milestones on the spine · ownership from Hafrok’s transactions record
Farmdown · 2012-02
Ørsted → KIRKBI / William Demant Invest 50%
- Stake
- 50%
- Consideration
- not disclosed
- Announced
- 2012-02
- Closed
- 2012-05
- Project stage
- FID
DONG Energy (now Ørsted) sold 50% to KIRKBI A/S (32%) and Oticon Foundation via William Demant Invest A/S (18%) for DKK 4.7bn (~EUR 633m at ~7.46 DKK/EUR). Payment structured in four instalments (11%, 12%, 56%, 21% from 2012-2015), tracking the construction expenditure profile. Total project cost ~EUR 1.25bn; DKK 4.7bn for 50% (~EUR 633m) is almost exactly 50% of total capex (~EUR 625m). This is capex-inclusive (buyers funded their 50% share of construction cost through instalment payments). Consistent with treatment of BRG2/BRG3/GW3 Ørsted farmdowns. FID taken 2011; construction commenced 2013; commissioned October 2015.
Evidence
- orsted.com — DONG Energy divests 50 per cent of German offshore wind farm to KIRKBI and the Oticon Foundation ↗ 2012-02 ◆ held
From Hafrok’s transactions record
Secondary trade · 2022-04
KIRKBI / William Demant Invest → Greencoat Renewables 50%
- Stake
- 50%
- Consideration
- €350m
- Implied 100% value
- €700m
- Implied
- €2.24m / MW
- Basis
- Price for the equity
- Announced
- 2022-04
- Closed
- 2022-06
- Project stage
- operational
Greencoat Renewables acquired the combined 50% stake held by KIRKBI (31.5%) and William Demant Invest / Oticon Foundation (18.5%) for EUR 350m cash. Secondary trade; Ørsted's 50% not involved. Announced 4 April 2022, closed June 2022. Wind farm benefits from government-backed floor price until May 2035.
Evidence
- renewablesnow.com — Greencoat Renewables to snap up EUR-350m stake in Borkum Riffgrund 1 - Offshore Wind News ↗ 2022-04 ◆ held
- Greencoat Renewables — Greencoat Renewables enters German market with first offshore transaction ↗ 2022-04-04 ◆ held
- Bundesanzeiger — Borkum Riffgrund I Offshore Windpark A/S GmbH & Co. oHG, Norden (AG Aurich HRA 201463) - Jahresabschluss zum 31. Dezember 2021, V. 03.04.2023 ↗ 2023-04-03 ◆ held
- Erhvervsstyrelsen (Danish Business Authority) — Boston Holding A/S, CVR 34222037 - Arsrapport 2021 (published 2022-03-28) ↗ 2022-03-28 ◆ 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: 2015-10→2015-10 · 2 recorded revisions · held (announced 2015-10, unchanged)
Revenue & offtake the regime the project was built under
Offtake regime on record
RegimeThe farm company's accounts state that all output is sold by direct marketing under the EEG to claim the market premium (§ 33g EEG in the FY2016-FY2019 accounts; the same wording, without the paragraph number, in FY2021-FY2024), with revenue from power sales and the market premium. The FY2023 accounts expected lower revenue in 2024 from a reduction of the EEG tariff under the compressed model (Stauchungsmodell), and the FY2024 accounts put the fall in revenue down to the lower EEG payment under the market-premium model.
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 since2015-10
Offshore construction2013-08 → 2015-10
Construction ports
PortEemshaven ◆·marshalling · quay 5000 m · crane 50 t · draft 14 m
Grid connection
from Hafrok’s substation, converter and cable registers
Offshore platforms · 2
Offshore substationBorkum Riffgrund 1 Offshore Substation·155/34 kV · in service 2013 · owner Borkum Riffgrund 1 wind farm owners (Ørsted-led; farm-owned platform)
HVDC systemDolWin1·800 MW · ±320 kV · in service 2015-07 · shared with Borkum West II (Trianel Windpark Borkum)
Converter supplierHitachi Energy (contracted as ABB; ABB Power Grids sold to Hitachi 2020)·DolWin1 · Heerema Fabrication Group (Netherlands), under EPC from ABB; topside design by Iv · 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 14 sources (16 primary) · ◆ 10 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 für Seeschifffahrt und Hydrographie (BSH)2004-02-25◆ Genehmigungsbescheid Offshore-Windpark B…
“Hamburg, den 25. Februar 2004 Genehmigungsbescheid [...] Nordwest (WSD), Schlossplatz 9, 26603 Aurich, genehmigt. [...] Die Eckkoordinaten (geographisches Bezugssystem WGS 84) des Gebietes, in dem die…”
supportsConsentWater depthCoordinatesConsent granted
[13]
Bundesnetzagentur — Marktstammdatenregister2026-08-23◆ Marktstammdatenregister (MaStR) offshore…
“Park row "Borkum Riffgrund 1": 78 units, 327.4 MW gross, statuses {'In Betrieb': 78}, operators ['Borkum Riffgrund I Offshore Windpark A/S GmbH ＆ Co. oHG'], commissioned 2015-02-16..2015-07-14, planne…”
supportsRegister entry
Operator8
[2]
Ørsted A/S2015-02◆ First power at German offshore wind farm
“Electricity has been generated and fed into the German grid for the first time at the offshore wind farm Borkum Riffgrund 1. … Borkum Riffgrund 1 is located 54 kilometres of coast, 37 kilometres off t…”
supportsFirst powerDistance from shore
[3]
Ørsted A/S2015-10◆ DONG Energys first offshore wind farm in…
"The wind farm is located 37 kilometres north of the German island Borkum and 54 kilometres from the German coast. The 78 wind turbines have a total nominal power of 312 MW. … The planning of the offs…
supportsFinal investment decisionCommercial operationCOD historyTurbinesTotal capacity+1 more
[4]
Ørsted A/S2014-10◆ DONG Energy installs first wind turbine …
“The first of 78 wind turbines has been successfully installed at DONG Energy's first German offshore wind farm, Borkum Riffgrund 1. The wind farm, which has a total capacity of 312MW … The offshore co…”
supportsOnshore constructionOffshore constructionSite rightsTurbinesTotal capacity
[5]
[6]
Ørsted A/S2014-07◆ All 77 foundations are in place at the G…
“The installation of the 77 monopile foundations and transition pieces were successfully finished Tuesday, 29, July 2014. [...] Borkum Riffgrund 1 Offshore Wind Farm will consist of 78 wind turbines wi…”
supportsTurbinesTotal capacityFoundationmarshalling
[15]
Unternehmensregister2018-05-08◆ Borkum Riffgrund I Offshore Windpark A/S…
“ist zum Bilanzstichtag 31. Dezember 2016 eine offene Handelsgesellschaft im Sinne des § 264a und § 267a HGB und unter der Nummer HRA 201463 im Handelsregister A des Amtsgerichts Aurich eingetragen. Si…”
supportsMechanismDetail
[18]
Unternehmensregister2025-02-14◆ Borkum Riffgrund I Offshore Windpark A/S…
“ist zum Bilanzstichtag 31. Dezember 2023 eine offene Handelsgesellschaft im Sinne des § 264a HGB und unter der Nummer HRA 201463 im Handelsregister A des Amtsgerichts Aurich eingetragen. Sitz der Gese…”
supportsMechanismDetail
[19]
Unternehmensregister2026-02-04◆ Borkum Riffgrund I Offshore Windpark A/S…
“ist zum Bilanzstichtag 31. Dezember 2024 eine offene Handelsgesellschaft im Sinne des § 264a HGB und unter der Nummer HRA 201463 im Handelsregister A des Amtsgerichts Aurich eingetragen. Sitz der Gese…”
supportsMechanismDetail
Financier2
[7]
Greencoat Renewables PLC2022-04
“Greencoat Renewables PLC … announced an agreement to acquire 50% of the Borkum Riffgrund 1 offshore wind farm in Germany from Kirkbi A/S (31.5%) and William Demant Invest A/S (18.5%) for a total cash …”
supportsCommercial operationTurbinesModelUnit capacityMechanism+1 more
[11]
Greencoat Renewables2022-06
“Greencoat Renewables PLC announces an agreement to acquire 50% of the Borkum Riffgrund 1 offshore wind farm in Germany from Kirkbi A/S (31.5%) and William Demant Invest A/S (18.5%) ... Ørsted, which r…”
supportsoperatorinvestor
Trade press2
[10]
Power Technology / GlobalData2015-12
Press report — cited, not quoted; read it at the source link.
supportsFoundationStatusConnection point
[12]