Borssele 1 & 2
Located 22 km off the coast of Zeeland, Netherlands. Connected via the TenneT Borssele Alpha offshore substation (66 kV to 220 kV export).
NetherlandsTechnology
Capacity
752 MW ◆
Turbines
94 × 8 MW ◆
Model
Siemens Gamesa SG 8-0-167 DD ◆
Foundation
Monopile ◆
Site & conditions
Site rights
Seabed rights held ∴
Origination
Borssele Wind Farm Sites I & II · 2016 ·
Water depth
14–38 m ◆
Distance from shore
22 km ◆
Wind speed
9.3 m/s @ 100 m ≈
Revenue & grid
Offtake
Premium · €72.7/MWh ◆
Grid
Secured · 2016-03-24 ◆
Connection
TenneT Borssele Alpha offshore substation (66 kV to 220 kV), … ◆
Schedule
FID
2018 ∅
COD
Dec 2020 ◆
Project timeline & ownership verified milestones on the spine · ownership from Hafrok’s transactions record
Origination · 2016-07
Borssele Wind Farm Sites I & II
- Awarded to
- Ørsted Borssele 1 B.V. (then DONG Energy)
- Basis
- integrated tender
From the auction results — the round that created the project.
Farmdown · 2021-04
Ørsted → NBIM 50%
- Stake
- 50%
- Consideration
- €1,375m
- Implied 100% value
- €2,750m
- Implied
- €3.66m / MW
- Announced
- 2021-04
- Closed
- 2021-05
- Project stage
- operational
Ørsted sold 50% to NBIM for EUR 1.375bn. Agreement signed 7 April 2021; completion ~31 May 2021. Ørsted retained 50%. Borssele 1&2 benefits from SDE+ subsidy.
Evidence
- orsted.com ↗
- offshoreWIND.biz — Norwegian Oil Fund Partners with Ørsted on Borssele 1&2 ↗ 2021-04 ◆ held
From Hafrok’s transactions record
Dashed tick marks today (9 Sep 2026). The teal diamond on the spine is origination — the seabed award or round that created the project. Every other ownership event 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: 2020→2020→2020-12 · 3 recorded revisions · slipped +0.5 yr (first announced 2020)
Revenue & offtake contract duration and price levels · money of the day
752 MW contracted — tender award
● Tender award · Borssele Wind Farm Sites I & II
Price€72.7/MWh ·Capacity752 MWAwardedJul 2016Term15 yrs
Installation how the build is going · from satellite counts and Hafrok’s registers
Satellite installation tracker
counted from satellite radar images · a structure standing in the sea on a given date, not a turbine producing power · a guide, not a sourced fact
Installation · counted from satellite
Foundations93 of 94≈99% · first seen 2020-01-09
Turbines93 of 94≈99% · first seen 2020-04-04
Latest count2021-12-31from 558 satellite passes · 1 substation platform left out so the counts compare with the turbine number · the count has ended: the build is complete
Hafrok counts foundations and turbines from satellite radar images (≈): a structure is counted once it is seen standing in the sea, which is not the same as producing power. A structure first seen in the last 60 days is not yet confirmed, because on a single image a freshly set foundation and a ship holding position look alike. Substation platforms are left out so the counts compare with the number of turbines. Rows marked with a dot (·) come from Hafrok’s own registers; a supplier or contract appears only where a source states it — everything else reads “not recorded”, never guessed.
Structures standing over time · count
strong line = confirmed · light line = seen in the last 60 days, not yet confirmed · the chart counts every structure (94 turbines + 1 platform); the table counts turbines only
foundationsturbines up (a substation top being set in place counts here too)
Satellite image
Image taken2026-09-07≈Copernicus Sentinel-1 radar satellite, northbound pass
Farm covered100%≈the whole farm lies inside the image
Structures ringed94 confirmed · 0 not yet confirmed≈as counted on 2021-12-31 · the image is newer than the count, so a bright spot without a ring may be a structure not yet counted
Construction ports
PortVlissingen Buitenhaven (O&M base) ◆·operations · quay 1740 m · crane 1200 t
Contains modified Copernicus Sentinel data 2026, processed by ESA and by Microsoft Planetary Computer.
Latest satellite radar image · 2026-09-07
a radar picture, not a photograph: the sea is dark, steel is bright · black is beyond the edge of the image
confirmed structure (94)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 substationBorssele Alpha·66/220 kV · in service 2020 · owner TenneT (Dutch TSO — client of the EPCIC contract)
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
17/18 fields verified · rests on 14 sources (7 primary) · ◆ 13 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
[2]
RVO (Netherlands Enterprise Agency)2015-09◆ Borssele Wind Farm Zone Sites I and II -…
“The BWFZ … is located 22.2 km from shore (12 nautical miles) and will be sub-divided into four BWFS. Water depth is approximately 16-38 m.”
supportsStatusConnection pointDistance from shore
[3]
RVO (Netherlands Enterprise Agency)2016-07-05◆ RVO Borssele I & II results
“On 5 July 2016 the subsidy and permits for the Borssele Wind Farm Sites I and II were awarded to Ørsted Borssele 1 B.V. … With 94 turbines type Siemens Gamesa 8,0 MW-167 DD this wind farm will get a t…”
supportsTurbinesModelUnit capacityTotal capacityMechanism+1 more
Operator5
[1]
Ministerie van Economische Zaken (Netherlands)2016-03-24◆ Kavelbesluit I windenergiegebied Borssel…
“'s-Gravenhage, 24 maart 2016 — De Minister van Economische Zaken, H.G.J. Kamp”
supportsConsentConsent granted
[4]
Ørsted A/S2017-07◆ Orsted signs agreement with Siemens Game…
“Ørsted has signed a contract with Siemens Gamesa for its Borssele 1 and 2 offshore wind farm in the Netherlands. ... The wind farm will be located 22km off the coast of the Dutch province of Zeeland w…”
supportsTurbinesModelUnit capacityTotal capacityWater depth+2 more
[5]
Ørsted A/S2017-08◆ Orsted chooses Vlissingen Buitenhaven fo…
“Ørsted and Zeeland Seaports have signed a Letter of Intent for developing an O&M base in Vlissingen Buitenhaven for the operation and maintenance of the offshore wind farm Borssele 1&2.”
supportsoperations
[6]
Ørsted A/S2021-02◆ Ørsted Annual Report 2020
“In December, we commissioned the 752 MW Dutch wind farm Borssele 1 & 2 on schedule and within budget. The wind farm deploys 94 Siemens Gamesa 8 MW wind turbines, making it the largest-ever built in th…”
supportsCommercial operationCOD history
[7]
Ørsted A/S2022-02◆ Ørsted Annual Report 2021
“Norges Bank Investment Management (NBIM) became a 50 % shareholder in our 752 MW Borssele 1 & 2 project. The total value of the transaction amounted to DKK ~10.2 billion and marks NBIM's first investm…”
supportsoperator
Auction results1
[14]
Overheid.nl (wetten.overheid.nl)2015◆ nl-regeling-borssele-1-2
Regeling windenergie op zee 2015 — the tender rulebook (rung-2 allocation regulation) for Borssele I & II. SDE+ subsidised round; text references the award of "subsidies" under the SDE+ scheme. Auctio…
supportsTender award · Borssele Wind Farm Sites I & II
Trade press6
[8]
[9]
[10]
[11]
WindpowerNL2020-01-13◆ Start foundation construction at Borssel…
Press report — cited, not quoted; read it at the source link.
supportsOffshore constructionFoundation
[12]
offshoreWIND.biz2016-07-05◆ DONG Energy Winner of Dutch Borssele I &…
Press report — cited, not quoted; read it at the source link.
supportsMechanismStrike / priceDetail
[13]