TenneT BorWin 6

Anagha.Puranik@mcdermott.com — Fri, 23 Jan 2026 21:20:36 +0000

TenneT BorWin 6

1,030MW HVDC

marine station

17,500 t

topsides Wt

9,300 t

jacket

35–40 m

water depth

Onshore converter

station

Highlights

Engineering, procurement, fabrication, transportation, installation and commissioning of the topside module (converter station), including jacket and piling installation
Fabrication carried out at McDermott’s Jebel Ali facility in Dubai

Through a consortium with Global Energy Interconnection Research Institute Co., Ltd. (GEIRI) and C-EPRI Electric Power Engineering Co., Ltd. (CEPRI), we are delivering full EPCIC services for an HVDC offshore converter platform located off the coast of Germany. Electricity generated by offshore wind farms will be converted from AC to DC power and transported to an onshore converter station located 146 miles (235 kilometers) onshore near Büttel. There, the electricity will be converted back into three-phase current and fed into the countries grid system.

High Voltage Direct Current

Location

Offshore Germany

Scope

EPFIC Lump Sum Turnkey

TenneT 2GW Portfolio Program BalWin4, LanWin1

Anagha.Puranik@mcdermott.com — Fri, 23 Jan 2026 21:20:36 +0000

TenneT 2GW Portfolio Program BalWin4, LanWin1

2 2GW

HVDC marine stations

32,000 t

topsides Wt.

13,000 t

jacket

40–45 m

water depth

Highlights

Full-scope delivery: design, fabrication, installation and commissioning of offshore converter platforms for BalWin4 and LanWin1
“Design One, Build Many” program approach improves cost and operational efficiency
Fabricated at McDermott’s Batam Fabrication Yard in Indonesia
Dedicated HVDC fabrication capacity and new block assembly and supporting infrastructure
Conversion of up to 2GW of offshore wind-generated electricity from 66 kV AC to 525 kV DC

The 2GW HVDC program includes two HVDC grid connection systems, BalWin4 and LanWin1, each with a capacity of 2GW. This new 2GW standard more than doubles existing transmission capacity and requires fewer connections between offshore wind farms and onshore converter stations, reducing the environmental impact.

The platforms are designed to convert up to 2GW of offshore wind-generated electricity from 66kV AC to 525kV DC. This conversion facilitates efficient transmission of electricity to the onshore station, enabling the integration of renewable energy sources into the power grid at a significant scale.

High Voltage Direct Current

Location

Offshore Germany

Scope

EPFIC Hybrid Contracting Model