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 · 2009-08 ◆
Connection
Hagermarsch substation (110kV, ~70km AC submarine cable, via … ◆
Schedule
FID
2007 ◆
COD
27 Apr 2010 ◆
Project timeline verified milestones only — each date carries its provenance mark
Dashed tick marks today (9 Sep 2026).
Announced-COD history: 2010-Q2→2010-04-27 · 2 recorded revisions · held (announced 2010-Q2, unchanged)
Revenue & offtake the regime the project was built under
Offtake regime on record
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 satellite counts and Hafrok’s registers
Satellite survey
the farm as it stands, counted from satellite radar images · built before the count began, so there is no build to chart
Satellite survey
Structures standing12≈12 turbines + 1 platform expected · 1 fewer than expected — a position the survey missed
Surveyed2026-09-01≈from 118 satellite passes
Built2009-04 → 2010-04-27offshore construction to start of operation, from the record
Hafrok counts the structures standing in the sea from satellite radar images (≈) and reads the count against the turbines and platforms on record. The farm was built before this count began, so the images show it complete; they cannot date its construction. Rows marked with a dot (·) come from Hafrok’s own registers.
Satellite image
Image taken2026-09-06≈Copernicus Sentinel-1 radar satellite, southbound pass · 1 newer pass skipped because the satellite’s track only caught part of the farm (the best of them 1%)
Farm covered100%≈the whole farm lies inside the image
Structures ringed79 confirmed · 0 not yet confirmed≈as counted on 2026-09-01 · the image is newer than the count, so a bright spot without a ring may be a structure not yet counted
Contains modified Copernicus Sentinel data 2026, processed by ESA and by Microsoft Planetary Computer.
Latest satellite radar image · 2026-09-06
a radar picture, not a photograph: the sea is dark, steel is bright · black is beyond the edge of the image
confirmed structure (79)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 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
15/18 fields verified · rests on 10 sources (4 primary) · ◆ 5 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
Operator2
[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…
“Date of grid connection: August 13, 2009. Anchored approximately 45 kilometers off the Borkum coast in the North Sea at 30 meters water depth. Five wind turbines were feeding power to the grid at the …”
supportsFirst powerStatusConnection point
Trade press5
[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]
Encyclopaedic1
[9]