alpha ventus
6 REpower 5M on jackets, 6 Multibrid M5000 on tripods. Located 45km north of Borkum.
Status
Operationallifecycle stage
Ownership
Location
GermanyNorth Sea
Technology
Capacity
60 MW ◆
Turbines
12 × 5 MW ◆
Foundation
Jacket+Tripod ◆
Site & conditions
Site rights
Seabed rights held ∴
Water depth
28–30 m ◆
Distance from shore
45 km ◆
Wind speed
9.9 m/s @ 100 m ≈
Revenue & grid
Offtake
FiT ◆
Grid
Secured · Aug 2009 ◆
Connection
Hagermarsch substation (110kV, ~70km AC submarine cable, via … ◆
Schedule
FID
2007 ◆
COD
27 Apr 2010 ◆
Project timeline & ownership verified milestones on the spine · ownership from Hafrok’s transactions record
Acquisition · 2026-10
EWE / RWE / Vattenfall → Ocean Breeze Energy (Macquarie) 100%
- Stake
- 100%
- Consideration
- not disclosed
- Announced
- 2026-10
- Project stage
- operational
EWE, RWE and Vattenfall agreed to sell all of their shares in alpha ventus, Germany's first offshore wind farm (60 MW, operating since 2010), to Ocean Breeze Energy, the owner and operator of the neighbouring BARD Offshore 1 farm, which is wholly owned by funds managed by Macquarie Asset Management. Ocean Breeze Energy plans to keep the farm running beyond its planned 20-year life. Completion was expected in the fourth quarter of 2026; at the time of writing the sale had not completed. Terms were not disclosed.
Evidence
- Vattenfall — Ocean Breeze Energy übernimmt Offshore-Windpark alpha ventus – Abschluss der Transaktion soll zeitnah erfolgen ↗ 2026-10-01 ◆ held
- Energy Global (reporting Watson Farley & Williams advisory notice) — WFW advises EWE on sale of stake in German offshore wind farm ↗ 2026-10-07 ◆ 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: 2010-Q2→2010-04-27 · 2 recorded revisions · held within the year (first announced 2010-Q2, latest 2010-04-27)
Revenue & offtake the regime the project was built under
Offtake regime on record
RegimeThe farm company's FY2011 accounts state that its revenue came from the EEG tariff paid for the turbines, that the October 2008 EEG amendment raised the offshore basic tariff from 9.0 to 15.0 ct/kWh from 1 January 2009, and that from 2012 the company could use direct marketing. By March 2025 the farm was still entitled to the EEG basic remuneration of 3.9 ct/kWh (Offshore Wind Biz).
InstrumentFiT
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 since2010-04-27
Offshore construction2009-04 → 2010-04-27
Grid connection
from Hafrok’s substation, converter and cable registers
Offshore platforms · 1
Offshore substationalpha ventus offshore transformer station (Umspannwerk alpha ventus)·owner DOTI — Deutsche Offshore-Testfeld und Infrastruktur GmbH & Co. KG, the EWE / E.ON / Vattenfall consortium that built and operates the test field. See builder_basis.
Sources & verification
Rests on 13 sources (6 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)2001-11◆ Genehmigungsbescheid Offshore-Windpark a…
supportsConsentConsent granted
[11]
Bundesnetzagentur — Marktstammdatenregister2026-08-23◆ Marktstammdatenregister (MaStR) offshore…
“Park row "alpha ventus": 12 units, 60.0 MW gross, statuses {'In Betrieb': 12}, operators ['DOTI Deutsche Offshore- Testfeld- und Infrastruktur- GmbH ＆ Co. KG'], commissioned 2009-08-01..2010-04-12, pl…”
supportsRegister entry
Operator4
[3]
DOTI (Deutsche Offshore-Testfeld und Infrastruktur GmbH & Co. KG)2025-01
“Project capacity: 60 MW. 12 turbines. Senvion 5M (REpower): 6 units, jacket foundation. Adwen AD 5-116 (AREVA Wind/Multibrid M5000): 6 units, tripod foundation. Ownership: EWE 47.5%, RWE 26.25%, Vatte…”
supportsTurbinesUnit capacityTotal capacityFoundationWater depth+1 more
[5]
Bundesministerium fuer Umwelt, Naturschutz und nukleare Sicherheit (BMU)2009-08-13◆ BMUKN: Germany's First Offshore Wind Tur…
“Germany's First Offshore Wind Turbines Connected to the Grid 13.08.2009 [...] Anchored in a depth of 30 meters below sea level approx. 45 kilometres off the Borkum coast, the first five wind turbines …”
supportsFirst powerStatusConnection point
[12]
Bundesanzeiger2011-12-31◆ DOTI Deutsche Offshore-Testfeld- und Inf…
“Die Umsatzerlöse resultieren aus der EEG-Vergütung der Windenergieanlagen. [...] Durch die Novellierung des EEG im Oktober 2008 wurde die Basisvergütung für Offshore Windanlagen zum 01. Januar 2009 vo…”
supportsMechanismDetail
[13]
Vattenfall2026-10-01◆ Ocean Breeze Energy übernimmt Offshore-W…
“EWE, RWE und Vattenfall verkaufen ihre Anteile am Offshore-Windpark alpha ventus an Ocean Breeze Energy. ... Ocean Breeze Energy plant den Weiterbetrieb über die vorgesehene Laufzeit von 20 Jahren hin…”
supportsBackground
Trade press6
[2]
[6]
Power Info Today2020-01
“Application submitted: May 16, 2000. Project approval: November 2001. Construction began: August 2007. Official commissioning: April 27, 2010. 30kV submarine cable transmits power from turbines to tra…”
supportsFinal investment decisionOffshore constructionSite rightsFoundationStatus+1 more
[7]
[8]
[10]
[14]
Energy Global (reporting Watson Farley & Williams advisory notice)2026-10-07◆ WFW advises EWE on sale of stake in Germ…
Press report — cited, not quoted; read it at the source link.
supportsBackground
Encyclopaedic1
[9]