Image for illustration purposes

The 1.1 GW Thor offshore wind project off the coast of Jutland, Denmark, has reached two major construction milestones. The high-voltage offshore substation has been delivered, and 36 out of 72 monopiles have been successfully installed.

Weighing 2,600 tonnes, the substation is a core element of the project. It collects power from the offshore turbines and converts it for transmission to the onshore grid at Voider Søndervang. The jacket and topside structures were fabricated and loaded out by HSM Offshore Energy in Schiedam, Netherlands, before being transported to site.

Project manager Koen Moons highlighted the complexity of the build and praised the collaboration across multiple partners and subcontractors, noting the substation sets a new standard in offshore infrastructure.

Simultaneously, RWE confirmed that half of the 100-metre-long monopiles have now been installed. These were transported in batches of five from Eemshaven in the Netherlands to the offshore site.

Once the remaining monopiles are installed later this year, turbine installation will begin from the Port of Esbjerg, Denmark, in 2026.

Scheduled for full operation in 2027, Thor is expected to generate enough clean electricity to power over one million Danish households. The project is jointly owned by RWE (majority stake) and Norges Bank Investment Management.

Source: 4C Offshore

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The Ferranti effect was first observed in 1887 by Sebastian Ziani de Ferranti in London.

This translates to approximately 242.8 GW of clean energy out of 484.8 GW total as of the end of June 2025

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