Asso.subsea has been awarded a nearshore cable installation contract for three projects under TenneT’s 2 GW program in Germany.
The offshore grid connection projects are BalWin4, LanWin1, and LanWin5, located off the northwestern coast of Baltrum Island, in northern Germany.
The contract marks the beginning of a new collaboration with Jan De Nul , acting as the main contractor, with the German transmission system operator (TSO) TenneT as the end client.
Each project involves the transportation and nearshore installation of a cable bundle comprising 2xHVDC power cables, one metallic return cable, and one fiber optic cable.
The cable transport will be carried out from load-out ports in the Netherlands or Germany, while the nearshore installation operations will be conducted using the cable-laying vessel Atalanti.
The scope of work also includes precision cable landing via beaching operations with spud cans and cable free-lay in intertidal zones and wet storage of cable ends.
Installation will be executed in 2027 (BalWin4), 2028 (LanWin1), and 2029 (LanWin5), respectively.
The first steel for BalWin4, Germany’s first 2 GW offshore grid connection, was cut in March this year. The commissioning date for BalWin4 is 2029, while LanWin1’s fabrication, installation, and commissioning follow a year later, reaching completion in 2030.
The consortium of Jan De Nul, LS Cable, and Denys will realize the cable connections in Lower Saxony to BalWin4 and LanWin1 , both to be connected in the Unterweser area, and LanWin5 in the Rastede area, Germany.
The planned commissioning date for LanWin5 is 2031.