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"He Dreiht" wind farm is fully wired

960 MW total output - electricity for 1.1 million households from 2026

02.09.2025

Source: E & M powernews

EnBW has announced that the internal farm cabling for its "He Dreiht" offshore wind farm has been completed. This means that the electricity can now flow from the future 64 wind turbines to the converter.

On behalf of EnBW, Seaway 7 has laid and connected the last of 64 submarine cables for the internal farm cabling of the He Dreiht offshore wind farm. This was announced by the client EnBW on September 2. This means that all 64 foundations of the wind turbines are now connected. The foundations were already installed in 2024.

The company Seaway 7 used two installation ships to lay and install a total of around 100 kilometers of submarine cable on the North Sea seabed. The cables were pulled into the foundations of the wind turbines and connected. The cable manufacturer JDR produced the 66 kilovolt submarine cables in Poland and the UK.

This internal cabling of the wind farm was also connected to the converter platform, which is operated by transmission system operator Tennet and was installed at sea in June. This is where the electricity generated will later be bundled, converted from alternating current to direct current and brought ashore via two high-voltage direct current export cables.

Wind power arrives from 2026

The latest generation of wind turbines from Vestas, each with an output of 15 MW, have been installed since the spring of this year. He Dreiht can mathematically cover the electricity needs of around 1.1 million households. It is scheduled to go into operation in spring next year.

The EnBW project is currently the largest offshore wind farm in Germany with a total output of 960 MW. It will be built around 85 kilometers northwest of Borkum and 110 kilometers west of Helgoland and will not require any subsidies. The investment volume amounts to around 2.4 billion euros. The major project is being coordinated by EnBW's offshore office in Hamburg. More than 500 people work on this major construction site in the sea at peak times and over 60 ships are involved.

Author: Susanne Harmsen