In the first half of 2021, the wind energy transmitted from the German North Sea to shore by the transmission system operator TenneT amounted to 9.673 terawatt hours (TWh).
Although this is around 16 percent less than in the first half of 2020 (11.51 TWh), the share of North Sea electricity in total wind power generation in Germany rose to 16.63 percent. This is 6.6 per cent more than in the first half of 2020, when the North Sea share was 15.6 per cent of total wind power generation. The decline in offshore wind energy fed into the German grid is purely weather-related.
In the Netherlands, the TenneT offshore grid connections transmitted 2.38 TWh in the first half of the year, which was a good 30 percent more than in the whole of 2020 (1.82 TWh). This is due to further expansion and the commissioning of the Borssele Beta offshore grid connection system in the second half of 2020. A further 1.5 TWh was fed directly into the Dutch TenneT grid onshore from Dutch offshore wind farms in the first half of 2021.