Gemini

Located ~85 km north of the Wadden Islands. Largest Dutch offshore wind farm by capacity at commissioning. Construction budget EUR 2.8bn.

Project timeline & ownership verified milestones on the spine · ownership from Hafrok’s transactions record

2014’15’16’17’18’19’20’21’22’23’24’25’26View the source for Consent grantedConsent granted 2013 ◆View the source for Final investment decisionFinal investment decision May 2014 ◆View the source for Onshore constructionOnshore construction 2015 ◆View the source for Offshore constructionOffshore construction Jul 2015 ◆View the source for First powerFirst power Feb 2016 ◆View the sources for Commercial operationCommercial operation 28 Apr 2017 ◆ — stake not disclosed · closed 2014-05 2013-04 JV FORMATIONNo origination on record — who held the site before the first recorded deal is not known; shown as a gap, never guessed. UNRECORDEDVan Oord → Alte Leipziger-Hallesche — 10% · €82m 2018-04 Transfer(s) not in Hafrok's record — shown as a gap, never guessed. UNRECORDEDTransfer(s) not in Hafrok's record — shown as a gap, never guessed. UNRECORDEDTransfer(s) not in Hafrok's record — shown as a gap, never guessed. UNRECORDEDTODAYVan Oord Van Oord Van Oord exited 2018-04Alte Leipziger-Hallesche — 10% today Alte Leipziger-Hallesche Alte Leipziger-Hallesche 10%Northland Power — 60% today · operator Northland Power Northland Power 60%Siemens Financial Services — 20% today Siemens Financial Servi… Siemens Financial Servi… 20%HVC Groep — 10% today HVC Groep HVC Groep 10%Van Oord → Alte Leipziger-Hallesche — 10% · €82m 10%
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-Q2→2017-04-28 · 2 recorded revisions · held within the year (first announced 2017-Q2, latest 2017-04-28)

Revenue & offtake contract duration and price levels · money of the day

600 MW contracted — feed-in tariff
● Feed-in tariff · Regeling windenergie op zee 2009 (SDE offshore subsidy tender)
Priceprice undisclosed ·Capacity600 MWAwardedMay 2010
Term15 yrs

Installation how the build is going · from sourced statements and Hafrok’s registers

Installation complete
Installation · on record
StageOperational
In operation since2017-04-28
Offshore construction2015-07 → 2017-04-28
Construction ports
PortEemshaven ~85km ◆·quay 5000 m · crane 50 t · draft 14 m
Grid connection
from Hafrok’s substation, converter and cable registers
Offshore platforms · 2
Offshore substationBuitengaats (Gemini OHVS)·in service 2017 · owner Gemini (the wind farm project company — NOT TenneT)
Offshore substationZeeEnergie (Gemini OHVS)·in service 2017 · owner Gemini (the wind farm project company — NOT 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
2017201820192020202120222023202420252026developer’s stated start 2017-04nowBuitengaats (Gemini OHVS)Buitengaats (Gemini OHVS)in service 2017in service 2017ZeeEnergie (Gemini OHVS)ZeeEnergie (Gemini OHVS)in service 2017in service 2017

Sources & verification

Rests on 11 sources (11 primary) · ◆ 7 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]
RVO / Bureau Energieprojecten (Rijksdienst voor Ondernemend Nederland)2013◆ Aansluiting wind op zee - Gemini (RVO cl…
“Inpassingsplan onherroepelijk: 17 augustus 2013. Inpassingsplan inwerkingtreding: 17 augustus 2013. [...] Buitengaats CV en ZeeEnergie CV [...] bouwen twee naast elkaar gelegen offshore windparken in …”
supportsConsentStatusConnection pointportConsent granted
[3]
Noordzeeloket (Rijkswaterstaat / Ministry of Infrastructure and Water Management)◆ Windenergiegebied Ten noorden van de Wad…
“Gemini Buitengaats en ZeeEnergie / In gebruik vanaf / 2017 / In gebruik tot / 2036 / Aantal turbines / 150 / Vermogen turbine (MW) / 4 / Vermogen windpark (MW) / 600 / Oppervlakte (km2) / 70 / Exploit…”
supportsTurbinesUnit capacityTotal capacity
Operator3
[2]
Ministerie van Economische Zaken (Dutch Government)2009-11-24◆ Staatscourant 2009, 17851 - Procedure SD…
“Regeling van de Minister van Economische Zaken van 18 november 2009, nr. WJZ/9203919, tot aanwijzing van productie-installaties voor het opwekken van hernieuwbare elektriciteit met behulp van windener…”
supportsMechanismDetail
[4]
Northland Power Inc.
“Located 85 km off the Netherlands coast in the North Sea. Water depth: 28-36 meters. 150x Siemens 4 MW turbines. Financial close: May 2014. First turbine connected: February 2016. Full completion: Apr…”
supportsFirst powerCommercial operationModelUnit capacityWater depth+1 more
[5]
Northland Power Inc.2017-04-28◆ Northland Power's Gemini Offshore Wind F…
“Northland Power's Gemini Offshore Wind Farm Achieves Full Project Completion [...]. The project achieved full completion on April 28, 2017 [...] All turbines have been operating since October 2016. [.…”
supportsCommercial operationCOD history
Auction results1
[18]
Overheid.nl (Ministerie van Economische Zaken)2009-11-18◆ nl-regeling-wind-op-zee-2009
"Het subsidieplafond ... bedraagt EUR 5.384.817.810,00. De Minister verdeelt het bedrag ... op volgorde van rangschikking van de aanvragen." / "Aanvragen ... worden ontvangen in de periode van 4 janua…
supportsFeed-in tariff · Regeling windenergie op zee 2009 (SDE offshore subsidy tender)
Trade press4
[6]
Offshore Wind (offshorewind.biz)2014-05-15◆ Dutch Gemini Becomes Largest-Ever Projec…
Press report — cited, not quoted; read it at the source link.
supportsFinal investment decision
[7]
Offshore Wind (offshorewind.biz)2015-07-02◆ Gemini: First Foundation Installed | Off…
Press report — cited, not quoted; read it at the source link.
supportsOnshore constructionOffshore constructionSite rightsFoundation
[9]
Power Technology2024
Press report — cited, not quoted; read it at the source link.
supportsoperatorowner
[11]
DTU Wind Energy / World Bank (Global Wind Atlas)2026
supportsMean wind speed
Encyclopaedic1
[10]
Wikipedia2026-07-02
supportsCoordinates