The Sandbank project area is located 90 kilometres off the coast of Sylt in the German North Sea and is therefore not visible either from land or from the islands just off the coast.
The wind farm extends over a total area of 60 square kilometres. Buoys around the wind farm mark a 500 metre safety zone, which is out of bounds to non-authorised shipping. The distance to the base port in Esbjerg in Denmark is about 100 km. Depending on waves and swell, a service ship can cover this distance in about three and a half hours, a large installation vessel in about six hours.
When it is completed, the Sandbank wind farm will have 72 Siemens wind turbines in the 4-megawatt class and an offshore substation. The foundations – monopiles – has been installed at depths of between 24 and 34 metres. When it is completed in 2017, the wind farm will be able to supply more than 400,000 households with green electricity. The first monopile was installed in June 2015.
Twin pack efficiency
In the immediate vicinity is the DanTysk wind farm, which went on stream in early 2015, which is an offshore power station also built by Vattenfall and Stadtwerke München. The proximity of the two wind farms to one another and to the service port of Esbjerg enables important synergies to be obtained, in turn enabling Vattenfall to operate the offshore wind farms very efficiently.
For example, an offshore accommodation platform located in the DanTysk wind farm has room for 50 service staff operating a shift system. This enables daily transfer times from land to the wind farms to be replaced by short daily transfers from the platform to the wind farms.
Room for growth
The Sandbank wind farm area can be expanded in the coming years and has the potential to provide a total installed capacity of around 500 megawatts. The project area has room for a total of 64 additional wind turbine locations, of which 24 have already been approved.
The North Sea areas off the coast of Sylt provide Vattenfall with sufficient generation potential to supply green power to over one million households in Germany.
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The project partners
The Sandbank project is the latest result of the established partnership between Vattenfall and Stadtwerke München (SWM) for the construction of offshore wind farms in the German North Sea. This enables both partners to draw upon their experience. This is a major advantage because offshore technology is at the start of its learning curve, so there is still much potential for cost savings to enhance its competitiveness.
Vattenfall holds a majority share of 51% in the partnership, and for Sandbank their team in Hamburg are again responsible for the planning, construction and operation of the wind farm.
About Vattenfall’s wind power activities
Vattenfall is a leading European energy company and operates over 1,000 wind turbines with a total installed capacity of 1,900 megawatts (MW). The company thus generated approximately five billion kilowatt hours of wind power in 2013. In terms of pure figures, this amount of power is enough to cover the annual energy needs of around 1.25 million average German households.
Since 2002, Vattenfall has so far invested around five billion euro's in its markets on the expansion of land-based and offshore wind energy. At the end of 2013, Vattenfall's share of installed offshore wind energy production worldwide was 12.5% (850 MW out of a total of 6,900 MW).
About Stadtwerke München
Stadtwerke München (SWM) is one of Germany's biggest energy providers and infrastructure companies. By 2025, SWM aims to generate enough green power in its own plants to supply all of Munich, which would make Munich the first city in the world with over one million inhabitants to have reached this target. Wind power will play a significant role in achieving this.
News about Sandbank
The construction of Vattenfall and Stadtwerke München’s 288 MW Sandbank offshore wind farm started in June 2015. Read more about what's happening in the project on our news page.
Read the latest Sandbank news
Just as with any other infrastructure project, a responsible attitude towards the environment and the natural surroundings is a key aspect of offshore projects like Sandbank.
More about the environment
Technology and components
Once the wind farm is completed, 72 wind turbines spread out over an area of 60 square kilometres will be using their vast rotor blades to turn the powerful North Sea wind into green energy.
More about the technology
The ships in action
Five specially-selected ships will be used during the various construction phases of the project. At peak times up to ten vessels are in action in the wind farm at the same time.
Read more about the ships