Tennet News


Construction Starts on Nederwiek 2 Offshore Wind Grid Platform

Feb 06, 2026

Seatrium, GE Vernova and transmission system operator TenneT have marked the strike steel for the Nederwiek 2 offshore platform, the third platform under TenneT’s 2 GW offshore wind grid program.The start of construction was marked by parallel…

Mammoet to Handle Substation Load-Outs for TenneT 2GW Program

Feb 04, 2026

Heavy-lifting and transport specialist Mammoet has signed a support contract with Seatrium to carry out the load-out of three offshore substations for TenneT’s 2 GW offshore grid connection program in the North Sea.Under the agreement, Mammoet…

Seatrium and Aibel Seek Arbitration to Resolve DolWin 5 Disputes

Jan 22, 2026

Seatrium, through its wholly owned subsidiary Seatrium New Energy (SNE), and consortium partner Aibel have started arbitration proceedings for the disputes related to the delivery of TenneT’s DolWin 5 offshore converter platform project in Germany’s North Sea…

Jan De Nul Wraps Up Cable Installation Job for TenneT’s DolWin Platform

Dec 15, 2025

Belgian offshore contractor Jan De Nul has concluded the 2025 transport and installation campaign of three HVAC grid connection cables at TenneT’s DolWin kappa platform.When finalized, these cables will ensure the transport of almost 660 MW renewable electricity from two offshore wind farms…

GE Vernova, Seatrium Ink TenneT Deal for 2.2GW North Sea Grid Link

Dec 11, 2025

A consortium of GE Vernova and Singapore’s Seatrium has secured a major contract from Dutch-German grid operator TenneT to deliver the BalWin5 offshore grid connection, a 2.2 GW high-voltage direct current (HVDC) transmission system designed…

L&T Joins Hitachi Energy to Support TenneT’s 2GW Offshore Wind Grid Scheme

Oct 30, 2025

India’s EPC contractor Larsen & Toubro (L&T) has been hired to deliver High Voltage Direct Current (HVDC) converters in support of the Dutch-German transmission system operator (TSO) TenneT’s 2GW offshore wind grid program in the North Sea.Collaborating with Hitachi Energy…

TenneT Completes Grid Connections for Hollandse Kust (West Beta)

Oct 28, 2025

Grid operator TenneT has completed the standardized 700MW grid connections for the Hollandse Kust (West Beta) offshore wind farm and has received the grid readiness certificate from DNV.The project was completed five months ahead of schedule…

Petrofac Goes into Administration after TenneT’s OW Contract Termination

Oct 27, 2025

Provider of services to the global energy industry Petrofac has filed for administration to the High Court of England and Wales to appoint administrators for the company, following TenneT’s decision to terminate its scope in 2 GW offshore wind grid project in the Netherlands…

Fugro Concludes Site Investigations for TenneT’s Offshore Grid Links

Oct 21, 2025

Dutch geological data specialist Fugro has completed land and marine site investigations for transmission system operator (TSO) TenneT Germany, to support the development of the LanWin1 and LanWin2 offshore grid connection projects.These projects are part of TenneT Germany’s 2 GW program…

Glamox to Light Up Tennet’s Offshore Wind Power Converter Platforms

Sep 22, 2025

Lighting specialist Glamox has secured contracts from electrical contractors working for three yards to provide connected marine lighting and light management systems for 11 offshore High Voltage Direct Current (HVDC) converter platforms.The…

NKT Installs Cables for TenneT’s BorWin5 Offshore Grid Connection

Aug 28, 2025

Danish power cable maker and services provider NKT has installed the HVDC power cable system for Tennet’s BorWin5 offshore grid connection in Germany.NKT said it completed the installation of the 320 kV HVDC system, completing the pull-in works…

TenneT Hires Asso.subsea for Cabling Work off Germany

Jul 29, 2025

Subsea cable services company Asso.subsea has secured the nearshore cable installation contract for three key projects under TenneT’s 2 GW grid program, including BalWin4, LanWin1, and LanWin5.The projects are located off the northwestern coast of Baltrum Island…

Mammoet to Assist Heerema with TenneT’s 2GW Offshore Grid System Delivery

Jul 07, 2025

Mammoet has signed a contract with Heerema Marine Contractors to support topside floatover operations for TenneT 2 GW offshore grid project in the North Sea.Mammoet will help prepare two giant units for floatover operations by skidding the topsides from HTV to the newly-built Heerema H731 barge…

TenneT Installs Giant HVDC Offshore Wind Converter Platform in North Sea

Jun 10, 2025

The DolWin epsilon HVDC offshore wind converter platform, part of German transmission system operator (TSO) TenneT’s grid expansion project, has been installed in the North Sea.The installation of DolWin epsilon HVDC platform at DolWin cluster…

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