Sandbank
Located 90km west of Sylt. Companion farm to DanTysk. JV Vattenfall/SWM.
Status
Operationallifecycle stage
Ownership
Vattenfall — 51% ◆
Stadtwerke München — 49% ◆Location
GermanyNorth Sea
Technology
Capacity
288 MW ◆
Turbines
72 × 4 MW ◆
Model
Siemens Swt 4-0-130 ◆
Foundation
Monopile ◆
Site & conditions
Site rights
Seabed rights held ∴
Water depth
24–40 m ◆
Distance from shore
90 km ◆
Wind speed
10.1 m/s @ 100 m ≈
Revenue & grid
Offtake
Premium ◆
Grid
Secured · Jan 2017 ◆
Connection
TenneT SylWin1 HVDC, 155kV AC export ◆
Schedule
FID
Aug 2014 ◆
COD
25 Jan 2017 ◆
Project timeline & ownership verified milestones on the spine · ownership from Hafrok’s transactions record
Farmdown · 2014-08
Vattenfall → Stadtwerke München 49%
- Stake
- 49%
- Consideration
- not disclosed
- Announced
- 2014-08
- Project stage
- FID
Vattenfall and SWM jointly took FID in August 2014, again on 51/49 basis mirroring DanTysk. Investment ~EUR 1.2bn. Consideration undisclosed.
Evidence
- group.vattenfall.com ↗
- offshoreWIND.biz — Stadtwerke München Looks to Acquire Sandbank OWF ↗ 2014-08 ◆ 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-Q1→2017-01-25 · 2 recorded revisions · held within the year (first announced 2017-Q1, latest 2017-01-25)
Revenue & offtake the regime the project was built under
Offtake regime on record
RegimeThe farm company's FY2017 accounts book its revenue as EEG market premium (EUR 190.2m in 2017, 31.6m in 2016) plus EEG power delivered (EUR 36.1m; 7.0m), with service fees for power marketing in its costs, and name the EEG 2014 rule that withdraws support during six consecutive hours of negative prices. They do not state the tariff rate or the tariff 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 since2017-01-25
Offshore construction2015-07 → 2017-01-25
Construction ports
PortEsbjerg ◆·installation · quay 10000 m · crane 300 t · draft 15 m
Grid connection
from Hafrok’s substation, converter and cable registers
Offshore platforms · 2
Offshore substationUmspannplattform Sandbank·33/155 kV · in service 2016 · owner Vattenfall / Stadtwerke Muenchen (wind farm owners) — farm-owned, not TSO-owned
HVDC systemSylWin1·864 MW · ±320 kV · in service 2015-04 · shared with Butendiek, DanTysk
Converter supplierSiemens·SylWin1 · Nordic Yards (Warnowwerft, Rostock) · 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 11 sources (9 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)2004-08-23◆ Genehmigungsbescheid Offshore-Windpark S…
“Hamburg, den 23.08.2004 Genehmigungsbescheid [...] Die Eckkoordinaten (geographisches Bezugssystem WGS 84) des Gebietes, in dem die Anlagen errichtet werden, lauten: 55° 16' 47,4'' N 6° 48' 01,4'' E 5…”
supportsConsentWater depthDistance from shoreCoordinatesConsent granted
[11]
Bundesnetzagentur — Marktstammdatenregister2026-08-23◆ Marktstammdatenregister (MaStR) offshore…
“Park row "OWP Sandbank": 72 units, 302.4 MW gross, statuses {'In Betrieb': 72}, operators ['DanTysk Sandbank Offshore Wind GmbH ＆ Co.KG'], commissioned 2016-09-06..2017-01-25, planned None..None.”
supportsRegister entry
Operator6
[2]
Offshore Wind Biz2014-08-11◆ Vattenfall, Stadtwerke München Decide to…
Press report — cited, not quoted; read it at the source link.
supportsFinal investment decision
[3]
Offshore Wind Biz2015-07-08◆ Sandbank OWF Construction Kicks Off | Of…
Press report — cited, not quoted; read it at the source link.
supportsOffshore constructionSite rights
[4]
Vattenfall AB2016-09-09◆ Correction: Sandbank Offshore Wind Farm …
“The offshore wind power plant Sandbank, located 90 kilometers west of the island of Sylt, has now supplied the German electricity network with its first wind power from the North Sea. The first of a t…”
supportsFirst power
[5]
Vattenfall AB2017-01-27◆ Sandbank offshore wind farm commissioned…
“On 25. January, the offshore wind farm Sandbank started to deliver power to the grid. … Sandbank, located 90 kilometers west of the island of Sylt, is accordingly fully commissioned. … Vattenfall hold…”
supportsoperatorinvestorCommercial operationCOD historyTurbines+2 more
[6]
Vattenfall AB2017-07-24◆ Offshore wind farm Sandbank now official…
“The offshore wind farm Sandbank with an installed capacity of 288 megawatt (MW) is now officially inaugurated. [...] Yesterday, July 23, 2017, Vattenfall and Stadtwerke München (SWM) officially put th…”
supportsCommercial operation
[12]
Bundesanzeiger2017-12-31◆ Sandbank Offshore Wind GmbH, Hamburg - J…
“Erlöse EEG Marktprämie 190.237 31.644 Erlöse Lieferung EEG-Strom 36.103 6.995 226.340 38.639 [...] Der Materialaufwand beinhaltet im Wesentlichen Aufwendungen aus der Betriebsführung des Windparks sow…”
supportsMechanismDetail
Trade press3
[7]
Power Technology (GlobalData)2017◆ Sandbank Offshore Windfarm, North Sea
Press report — cited, not quoted; read it at the source link.
supportsModelUnit capacityFoundationStatusConnection point
[8]
Offshore Wind Biz2015-02-23◆ WINDFARM UPDATES: Sandbank & Wikinger | …
Press report — cited, not quoted; read it at the source link.
supportsFoundationinstallation
[10]