Kattegatt Syd Export is the developer-owned export cable system that will transmit power from Vattenfall’s 1.2 GW Kattegatt Syd offshore wind farm in the Kattegat to the Swedish 400 kV transmission grid in bidding zone SE3. The grid connection comprises several high-voltage AC (HVAC) submarine ex...
A notification from Sveriges Fiskares Producentorganisation (SFPO), issued on 6 October 2025, states that Vattenfall will carry out bottom investigations for archaeological purposes within the Kattegatt Syd export cable corridor between 13 October and 30 November 2025. This aligns with Vattenfall’s description of archaeological investigations running August–November 2025 across the wind farm and export cable route. Together these sources indicate the archaeological survey programme along the export cable route was completed by November 2025.
Vattenfall’s official Kattegatt Syd project page states that archaeological investigations are being carried out in the wind farm area and the offshore export cable corridor during August–November 2025, including ROV-based seabed surveys offshore and visual diving/probing nearshore. This matches the planned campaign of archaeological investigations for the wind farm site and export cable route, so the start of the “other survey” campaign can be confirmed as August 2025.
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Owners
By 18 July 2025, Vattenfall had secured the necessary network concession for the laying and operation of the offshore and onshore export cables for the 1.2 GW Kattegat(t) Syd project, completing a key regulatory requirement for its dedicated export transmission link from the offshore wind farm to the Swedish transmission grid near Falkenberg. This concession authorises both installation and long-term operation of the export cable system.
In spring 2025, the Swedish government granted Vattenfall permission for the submarine cables serving the 1.2 GW Kattegat(t) Syd offshore wind farm, including both the export cables to shore and the inter-array cables within the wind farm, as well as authorisation to carry out detailed seabed surveys along the project site and cable corridor. These approvals cover key offshore transmission elements needed to connect the project, located off the coast of Falkenberg, to the Swedish grid.
In the fourth quarter of 2024, Vattenfall completed geophysical investigations within the Kattegat Syd array area and the export cable corridor off Falkenberg, collecting seabed data that formed the basis for the project’s detailed design and the selection of suitable installation technology for foundations and export cables.
In the fourth quarter of 2024, Vattenfall carried out and completed geotechnical investigations across the Kattegat Syd site and export cable corridor, providing soil and ground condition information needed to finalise the detailed design and inform the choice of foundation types and cable installation methods for the wind farm’s export connection.
On behalf of Vattenfall, WSP prepared consultation documents and conducted a public/stakeholder consultation in connection with the application for a seabed survey permit under Sweden’s Continental Shelf Act for the Kattegat South project, including the export and cable corridors. This consultation related to the seabed survey permit was carried out in autumn 2020 and completed in spring 2021.
Vattenfall initiated a transboundary public consultation under the Espoo Convention for the Kattegatt Syd offshore wind project, including its export and underground cable corridors to the Swedish transmission grid. The consultation documentation, published on 22 February 2021, describes the planned 1,200 MW wind farm area in the Kattegat Sea, the export cable corridor running north towards Väröbacka in Varberg municipality, and associated landfall and onshore cable routes, and invites potentially affected neighbouring countries to submit comments on the project’s expected transboundary environmental impacts over its full lifecycle.
On behalf of Vattenfall, WSP prepared technical descriptions and environmental assessments to support an application for a seabed survey permit under the Continental Shelf Act for the Kattegat South project area, including export cables towards the Väröbacka grid station, and submitted this application to the Swedish Government in May 2020.
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