The Thor offshore wind farm is a 1.1GW project being developed approximately 22km from Thorsminde, off the west coast of Jutland, Denmark.
The project is being developed under a joint venture between RWE (51%) and Norges Bank Investment Management (49%). RWE oversees construction and will operate the project.
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The decision to develop the wind farm was made in June 2018 under the Danish Energy Agreement.
In January 2022, RWE won the tender to build the project and signed a concession agreement with the Danish Energy Agency (Energistyrelsen) to build and operate the project for 30 years. The wind farm is expected to require an investment of DKr15.5bn ($2.36bn).
The power produced by the wind farm will meet the needs of more than one million households. The project will also support the local economy and provide employment opportunities. It is expected to generate DKr2.8bn for the Danish Government.
The project received its electricity production licence from Energistyrelsen in January 2026 for a period of 30 years.
Following the installation of the first turbine in March 2026, the Thor offshore wind farm delivered electricity into the Danish grid for the first time the same month.
The project will commence full operations in 2027 and enable RWE to increase its global offshore wind capacity from 2.4GW to 8GW by 2030.
Wind turbine details at Thor offshore wind farm
The Thor wind farm project will feature a total of 72 SG 14-236 DD offshore wind turbines, installed on jacket foundations in a water depth of 27m (88.6ft).
Each SG 14-236 DD wind turbine can generate up to 15MW of electricity. The turbines have a rotor diameter of 236m, a swept area of 43,500m² (468,230ft²) and a blade length of 115m.
The turbines are based on IntegralBlade® technology, which enables them to generate 30% more annual energy compared to the SG 11.0-200 DD turbine.
Two new 220kV electrical substations were developed for the project, one onshore and one offshore.
Construction details at Thor offshore wind farm
Geotechnical site investigations for the projects started in July 2022. The soil study at the site contributed to the design and installation of the cable system.
In April 2022, RWE signed a letter of intent to develop a service station at the Port of Thorsminde for the operation and maintenance of the wind farm. The facility was officially opened in March 2026.
The ground-breaking ceremony for the project was held at the Port of Thorsminde in November 2024, marking the official start of construction.
The first monopile foundation was installed in April 2025, followed by the first wind turbine in March 2026.
The project is set to become the first facility globally to deploy 36 low-emission steel turbine towers manufactured by Siemens Gamesa.
Additionally, 40 turbines will feature recyclable rotor blades. The first lot was successfully installed in April 2026.
By July 2026, half of the project’s proposed turbines were installed.
Grid connection at Thor wind farm
The Thor offshore wind farm is connected to the transmission system of Energinet, Denmark’s national transmission system operator. Energinet agreed to construct two new electrical substations for the wind farm in April 2022.
The offshore substation was delivered by HSM Offshore Energy in July 2025 and is located approximately 22km off the west coast of Jutland.
Siemens Energy completed the Volder Søndervang onshore substation located close to the coastline and the adjacent grid connection point of Energinet.
Contractors involved in Thor offshore wind farm
Siemens Gamesa Renewable Energy, a subsidiary of energy company Siemens Energy, was selected as the preferred wind turbine supplier for the project in January 2023. It will supply 72 SG14-236 DD offshore wind turbines for the wind farm. The contract also includes a service agreement for the wind turbines.
Siemens Energy was chosen as the preferred supplier for the project’s onshore substation, working along with Højgaard Danmark, a construction company based in Denmark.
Netherlands-based energy solution provider HSM Offshore Energy was contracted to provide commissioning, construction, engineering, installation and procurement services for the high-voltage offshore substation and its jacket foundation.
Geo-data specialist Fugro was contracted to undertake geotechnical site investigations.
Energinet appointed Ramboll, an engineering, architecture and consultancy company, to carry out the strategic environmental assessment (SEA) process for the project.
Consulting company Arup provided the design reviews for the substations, which included HVAC design and commissioning support, fire risk assessment, civil, structural and geotechnical engineering verifications.
EEW Special Pipe Constructions (EEW SPC) was responsible for manufacturing 36 monopile foundations for the project.
Global Wind Service, a wind turbine installation services provider, was contracted to install secondary steel structures for the monopile foundations.
Fred. Olsen Windcarrier, an offshore wind installation services supplier, was engaged to provide vessels for the turbine installation works.
Electrical and technical solutions provider ProCon Wind Energy was contracted to deliver design engineering, onshore construction and offshore completion services for the foundations and offshore substations.
Glamox, a lighting solutions company, was contracted by ProCon Wind Energy to provide LED marine lighting for the internal and external platforms of the foundations.
RWE selected a consortium comprising Hellenic Cables, the cables segment of Cenergy Holdings, and maritime services provider Jan De Nul to deliver the complete submarine and onshore export cable system, as well as the inter-array cable system, for the Thor offshore wind farm project.
