Hafrok

Tahkoluoto

Located approximately 1.2 km off the Tahkoluoto peninsula near Pori, in the Gulf of Bothnia.

Status
Operationallifecycle stage
Ownership
SHSuomen Hyötytuuli Oy — 100% ◆
Location
Finland
Gulf of Bothnia
Verification
15/18 fields verified
11 sources · ◆ 2 documents held
◆verified≈modelled◇sourced∴inferred∅no source·derived
open the source register →
Technology
Capacity 42 MW ◆ Turbines 10 × 4.2 MW ◆ Model Siemens Swt 4-0-130 ◆ Foundation GBS ◆
Site & conditions
Site rights Seabed rights held ∴ Water depth 1–20 m ≈ Distance from shore 1.2 km ◆ Wind speed 8.5 m/s @ 100 m ≈
Revenue & grid
Offtake FiT ◆ Grid Secured ◆
Schedule
FID 2015 ∅
COD 2017-Q3 ◆

Project timeline verified milestones only — each date carries its provenance mark

2016’17’18’19’20’21’22’23’24’25’26View the source for Consent grantedConsent granted Dec 2015 ◇Final investment decision 2015 ∅View the source for Onshore constructionOnshore construction 2016 ◆View the source for Offshore constructionOffshore construction 2016 ◆View the source for First powerFirst power 2017 ◆View the source for Commercial operationCommercial operation 2017-Q3 ◆
Dashed tick marks today (9 Sep 2026).

Revenue & offtake the regime the project was built under

Offtake regime on record
RegimeFinnish feed-in tariff (tuotantotuki) under Act on Production Subsidy for Electricity Produced from Renewable Energy Sources (1396/2010), target price 83.5 EUR/MWh for 12 years 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 satellite counts and Hafrok’s registers

Installation complete
not yet surveyed by satellite; the built farm can be, on request
Installation · on record
StageOperational
In operation since2017-Q3
Offshore construction2016 → 2017-Q3
Construction ports
PortPort of Pori ◆

Sources & verification

15/18 fields verified · rests on 11 sources (6 primary) · ◆ 2 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.
Operator5
[1]
Suomen Hyötytuuli Oy2026-01◆ Tahkoluoto offshore wind farm - Hyötytuu…
“offshore wind farm consisting of 10 offshore wind turbines was built in Tahkoluoto, Pori in 2017 … Tahkoluoto Offshore wind farm's take-over was celebrated on 31 August”
supportsTurbinesStatusCoordinates
source ↗archive ↗
[4]
Jan De Nul Group2026-06-16
“In 2016, Jan De Nul Group carried out preparatory works … In 2017, we installed the steel gravity-based foundations and the wind turbines. In the autumn of 2017, the wind farm was ready for use … Tahk…”
supportsFoundationport
source ↗
[7]
Suomen Hyötytuuli Oy2024-03-08
“Suomen Hyötytuuli's onshore wind farms and the current Tahkoluoto offshore wind farm will be owned by the new Suomen Hyötytuuli Oy … The three new companies will be owned by Suomen Hyötytuuli's curren…”
supports↳ parents
source ↗archive ↗
[9]
Suomen Hyotytuuli2024
“the current Tahkoluoto offshore wind farm will be owned by the new Suomen Hyötytuuli Oy”
supportsoperator
source ↗
[10]
Lappeenrannan Energia Oy2017-11-30
“Lappeenrannan Energian osittain omistama Suomen Hyötytuuli Oy juhli elokuussa maailman ensimmäisen jääolosuhteisiin suunnitellun merituulipuiston käyttöönottoa. ... Tahkoluoto tuotti osakkailleen sähk…”
supportsFirst power
source ↗
Trade press5
[2]
offshoreWIND.biz2017-09-04
Press report — cited, not quoted; read it at the source link.
supportsCommercial operationTotal capacity
source ↗
[3]
offshoreWIND.biz2018-09-05
Press report — cited, not quoted; read it at the source link.
supportsOnshore constructionOffshore constructionSite rightsTurbinesModel+3 more
source ↗archive ↗
[5]
WindEurope2017-09◆ Finland opens its first offshore wind fa…
“42 MW Tahkoluoto wind farm … officially opened … ahead of schedule … first offshore wind farm designed for icy conditions … 83,5 €/MWh for 12 years … 1,2 kilometres from shore … 9 metres [water depth]”
supportsTotal capacityMechanismDetailDistance from shore
source ↗archive ↗
[12]
GEBCO Compilation Group2020
supportsWater depth
source ↗
[13]
DTU Wind Energy / World Bank (Global Wind Atlas)2026
supportsMean wind speed
source ↗
Encyclopaedic1
[11]
Wikipedia (Finnish)2026-07
“Voimalapuiston kaavoitus käynnistyi 2013 ja lainvoimaiset rakennusluvat saatiin vuoden 2015 maaliskuussa, lainvoimainen osayleiskaava elokuussa ja vesilain edellyttämä lupa joulukuussa.”
supportsConsentConsent granted
source ↗