By late July 2025, Asso.subsea had been awarded the nearshore cable installation scope for three of TenneT’s 2 GW grid connections, including LanWin5, marking a subcontract under Jan De Nul’s main export cable contract. For LanWin5, Asso.subsea will transport and install a bundled nearshore export cable system—comprising two HVDC power cables, one metallic return cable, and one fibre-optic cable—off the northwestern coast of Baltrum Island, with operations planned for 2029.
BNetzA confirmed LanWin5 in Netzentwicklungsplan (NEP) 2037/2045 (2023) on 1 March 2024. This confirmation under §12c EnWG creates the legal basis for the responsible TSO to plan, procure, and construct the offshore grid connection system.
BNetzA confirmed the Netzentwicklungsplan Strom 2037/2045 (2023 edition) on 1 March 2024 under section 12c of the German Energy Industry Act (EnWG). This confirmation creates the legal basis and obligation for the responsible TSO to plan, procure, and construct this offshore grid connection system. For regulated German TSO offshore grid connections, the BNetzA NEP confirmation functions as the de facto Final Investment Decision: unlike merchant or developer-led projects that require a separate board-level investment decision and financial close, the NEP confirmation simultaneously authorises and obligates the TSO to invest. Costs are recovered through the offshore grid levy (Offshore-Netzumlage). The NEP 2037/2045 (2023) schedules 25,980 MW of offshore transmission capacity across 16 grid connection systems for commissioning between 2026 and 2032.
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LanWin5 is a TenneT-designed 2 GW (2,000 MW) ±525 kV HVDC offshore grid connection that will transmit electricity from planned German North Sea offshore wind farms to an onshore converter/hub in the Rastede / Großenmeer area (NordWest hub). The project uses the 2 GW standardised offshore platform...
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On 5 May 2023, TenneT awarded a 525 kV HVDC cable system contract to a consortium of Jan De Nul, LS Cable & System, and Denys covering several projects in its 2 GW programme, including LanWin5. Under this award, the consortium will design, manufacture, deliver, and install the HVDC export cable connection for LanWin5 to the Rastede area in Lower Saxony, as part of a portfolio that also includes BalWin4 and LanWin1.
TenneT awarded Petrofac / Hitachi Energy consortium the HVDC converter framework for LanWin5 as part of TenneT's 2 GW programme. Framework value approximately €13 billion. Petrofac scope later partially terminated.
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