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TenneT 2GW offshore grid programme

The backbone grid build-out behind essentially every North Sea wind farm coming online this decade — a long, steady programme of platform fabrication and offshore installation work spread across multiple Dutch main contractors.

Grid & HVDC · Netherlands / Germany (Europe, North Sea) · every fact below is as reported by the linked sources, checked by hand on 2026-10-08.

Size
At least 14 platforms of 2 GW each by 2032 — at least 8 in the Netherlands and 6 in Germany
Operator / developer
TenneT (Dutch/German transmission system operator)
Phase, as reported
fabrication / installation (second 2GW jacket, IJmuiden Ver Gamma, in construction since September 2026; first jacket, IJmuiden Ver Beta, due offshore summer 2027, topside 2H 2028)
Checked on
2026-10-08

Phase track steps named in the reported phase are marked

  1. FID
  2. Engineering
  3. Fabrication
  4. Construction
  5. Installation
  6. Commissioning

Who builds it as stated by the sources

  • TenneT — developer/grid operator, FID holder for the 14-platform programme
  • Heerema Marine Contractors — transport & installation framework agreement, awarded ~60% of lots; building a new float-over barge for 30,000+ tonne substations, deploying SSCV Sleipnir
  • Allseas — transport & installation framework agreement, remaining lots
  • GE Vernova–Seatrium — main contractor for the IJmuiden Ver Beta, IJmuiden Ver Gamma and Nederwiek 2 converter platforms
  • Heerema Fabrication Group — builds the jackets for those three converter platforms in Vlissingen, commissioned by GE Vernova–Seatrium

Key dates as stated by the sources

Programme target
2032 for full 14-platform build-out

Disciplines likely needed our inference

  • structural/fabrication engineering
  • marine installation supervision
  • E&I
  • commissioning
  • project controls

Our inference from project kind and phase — not stated by the sources below.

On the Radar news about this project, each linked to its source

  1. Source checked 18 September 2026TenneT 2GW programme: 14 offshore grid connections by about 2032
  2. Source checked 18 September 2026Heerema begins building the jacket for IJmuiden Ver Gamma
  3. 31 August 2026Jacket for TenneT's IJmuiden Ver Beta platform takes shape in Vlissingen
  4. 3 August 2026Larsen & Toubro and Hitachi Energy sign 2GW framework agreement with TenneT
  5. 17 May 2023TenneT awards 2GW platform transport and installation to Heerema and Allseas

Sources checked on 2026-10-08

  1. TenneT awards transport and installation slots for 2GW offshore platforms to Allseas and HeeremaTenneT (company newsroom) · published 2023-2024 · retrieved 2026-09-19
  2. Heerema to Build New Float-Over Barge for TenneT's 2GW Program Offshore PlatformsHeerema Marine Contractors (company newsroom) · published 2025-01 · retrieved 2026-09-19
  3. Construction starts on TenneT's second 2GW jacketOcean Energy Resources · published 2026-09-18 · retrieved 2026-09-19
  4. TenneT awards contracts to Allseas and Heerema for 2GW offshore platformsNS Energy · published 2023-05-18 · retrieved 2026-10-08
  5. Heerema signs framework agreement for transportation and installation of TenneT's 2GW programHeerema Marine Contractors (company newsroom) · published 2023-05-17 · retrieved 2026-10-08
  6. Jacket for TenneT's IJmuiden Ver Beta Platform Starts Taking ShapeoffshoreWIND.biz · published 2026-08-31 · retrieved 2026-10-08
  7. Mammoet supporting Heerema with offshore wind topsides floatoverOffshore Magazine · published 2025-07-08 · retrieved 2026-10-08

Position on our globe: 52.60°N 3.70°E. Location approximate: Multiple 2GW platforms across the Dutch and German North Sea EEZ; coordinate is an indicative Dutch-sector location, not a specific platform site.

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