Poseidon

Zephyr is, in cooperation with Vattenfall, planning an offshore wind farm outside the west coast of Sweden in the south part of Skagerrak. The project is located in the Swedish Exclusive Economic Zone outside of the territorial boarder, about 40 km northwest of Gothenburg.

The project area is divided in to two subareas, Poseidon Nord and Poseidon Syd. Poseidon Nord covers an area of about 152 km² and Poseidon Syd about 23 km².

The wind farm has the potential to produce about 5,5 TWh electricity each year which is equivalent to one year’s electricity consumption of approximately 1 million households (5500 kWh each household/year).

The wind farm is planned to consist of 61-94 wind turbines with a maximum height of 260-340 meters.

As the wind farm is planned to be located far from land (about 25 km away from the closest islands in the outer archipelago), large sea depths must be taken into consideration, especially in the north sub-area. Therefore, Zephyr is planning to use floating foundations in the north sub-area.

The companies are positive about using new technology like the floating foundations as it allows for large-scale electricity production to be established further away from land and on depths that would not have been suitable for bottom fixed foundations. In addition, the floating foundations are also estimated to have a lower impact on, for example, demersal fauna and marine mammals.

The location of the wind farm is a result of very good wind conditions in the area and good possibilities for grid connection onshore.

During spring and early summer in 2021 a delimitation consultation was carried out. The result will be put together in a consultation report and presented in an environmental impact statement. Prior to the permit application, investigations are carried out which will form the basis of the environmental impact statement. The purpose of the investigations is to collect information in order to gain more knowledge about the marine environment and environmental values.