TetraSpar Demonstrator
Floating-foundation demonstrator at METCentre, Karmoy.
Status
Operationallifecycle stage
Ownership
Location
NorwayNorth Sea
Technology
Capacity
3.6 MW ◇
Turbines
1 × 3.6 MW ◇
Maker
Siemens Gamesa (model not recorded) ◆
Foundation
Floating ◇
Site & conditions
Site rights
Exploration right Concession · Olje- og energidepartementet (Norwegian Ministry of Petroleum and Energy) · 2013-09 ◆
Distance from shore
10 km ◇
Wind speed
9.6 m/s @ 100 m ≈
Revenue & grid
Offtake
—
Grid
—
Schedule
FID
13 Feb 2019 ◆
COD
2021 ◇
Project timeline & ownership verified milestones on the spine · ownership from Hafrok's transactions record
6 dated milestones on the spine, each with its source · the ownership chain from Hafrok's transactions record · the developer's announced-COD history
For registered readers · register below ↓
Revenue & offtake contract terms, price levels and the route to market
the contract terms on record · price over time in money of the day · the routes to market and the next visible round
For registered readers · register below ↓
Installation how the build is going · from sourced statements and Hafrok's registers
construction status and turbines standing · vessel and port contracts · the grid connection and whether it is ready in time
For registered readers · register below ↓
Sources & verification
Rests on 12 sources (6 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.
Operator6
[7]
Stiesdal Offshore2026-03-27◆ TetraSpar Demonstrator to be decommissio…
“TetraSpar Demonstrator ApS, a project company owned by Stiesdal Offshore, RWE and TEPCO Renewable Power, today announced the planned decommissioning of the floating TetraSpar Demonstrator ... The oper…”
supportsStatus note
[9]
innogy SE / Shell / Stiesdal Offshore Technologies (joint press release, hosted by Stiesdal)2019-02-13◆ Shell, innogy and Stiesdal Offshore Tech…
“Essen, 13 February 2019 innogy SE, Shell and Stiesdal Offshore Technologies A/S (SOT) are bringing floating wind to the next level: The partners have taken the final investment decision on the ‘TetraS…”
supportsFinal investment decisionMaker
[10]
TetraSpar Demonstrator partners Shell, TEPCO RP, RWE, Stiesdal (joint press statement, hosted by Stiesdal)2021-12-01◆ TetraSpar Demonstrator, the world's firs…
“The floating wind foundation TetraSpar Demonstrator owned by Shell, TEPCO RP, RWE and Stiesdal has been successfully connected to Norway’s grid • The floating foundation was towed from Denmark to Norw…”
supportsFirst power
[11]
Bourbon (installation contractor)2021-08-27◆ Bourbon Subsea Services successfully ins…
“After mooring lines installation in June, towing and hook up in July, Bourbon Subsea Services completed the offshore installation of the 3,6 MW TetraSpar Demonstrator Floating Wind Turbine at Metcentr…”
supportsOffshore construction
[12]
Energidepartementet (Norwegian Ministry of Energy), via NVE case 2011012852026-01-20◆ Vedtak - Norwegian Offshore Wind AS - Sø…
“Marin Energi Testsenter AS fikk den 10. september 2013 konsesjon etter havenergilova § 3-1 fra Olje- og energidepartementet (nå Energidepartementet) til å bygge og drive et test- og demonstrasjonsanle…”
supportsSite rights
[13]
Norges vassdrags- og energidirektorat (NVE), case 2011012852022-09-20◆ Bakgrunn for vedtak - Marin Energi Tests…
“Den 01.10.2020 kom det inn forslag til detaljplan for installasjon av demonstrasjonsturbinen Tetraspar. Detaljplanen ble godkjent av NVE den 03.06.2021, og Tetraspar ble ankret opp på testfeltet utenf…”
supportsConsentConsent appliedConsent granted
Trade press6
[1]
offshoreWIND.biz2021
Press report — cited, not quoted; read it at the source link.
supportsCommercial operationTotal capacity
[2]
offshoreWIND.biz2021
Press report — cited, not quoted; read it at the source link.
supportsTurbinesUnit capacityFoundationDistance from shore
[3]
[4]
offshoreWIND.biz2026-03-27
Press report — cited, not quoted; read it at the source link.
supportsowner
[6]
[8]
offshoreWIND.biz2026-09-08◆ TetraSpar Floater Completes Five-Year Te…
Press report — cited, not quoted; read it at the source link.
supportsStatus note
Early access