Offshore windfarm Hollandse Kust Zuid inaugurated

Today, Dutch King Willem-Alexander officially inaugurated wind farm Hollandse Kust Zuid, celebrating the completion of Vattenfall’s largest offshore windfarm to date with board members of Vattenfall, BASF and Allianz. To mark the occasion, a life-sized human turbine was created on the beach of IJmuiden. The fossil free electricity generated from Hollandse Kust Zuid is expected to equal the consumption of 1.5 million households.

Hollandse Kust Zuid is located in the North Sea, 18-36 kilometers off the Dutch coast between the towns of Scheveningen and Zandvoort. The 139 turbines have a total capacity of 1.5 GW. Hollandse Kust Zuid is owned by Vattenfall, BASF and Allianz. The wind farm is expected to be fully operational in 2024 and will be serviced out of the port of IJmuiden. 

Helene Biström, Senior Vice President Wind at Vattenfall 
“Vattenfall aims to be a leader in the energy transition and offshore wind is essential for energy security and to achieve net zero. The realization of a project of this magnitude makes me really proud and today is a great example of what we can achieve when partnering with industry. Hollandse Kast Zuid will not only contribute to reducing BASF’s carbon footprint but will also help meet local businesses and households demand for fossil free electricity.”  

Dr. Martin Brudermüller, Chairman of the Board of Executive Directors of BASF SE 

“Hollandse Kust Zuid plays an important role in our transition toward Net Zero. Nearly half of the electricity from Hollandse Kust Zuid will be used to reduce the carbon footprint of our products at BASF sites in Europe. With this ambitious project, we continue to be a pioneer in the industry, securing green energy via direct investments. It makes me very proud that together with our strong partners, we can today inaugurate this windfarm. I’m looking forward to more such projects, as we at BASF stand firmly by our climate-neutrality commitment.”

BASF aims to reduce its greenhouse gas emissions by 25% by the year 2030 and achieve net-zero emissions by 2050. One important lever to further bring down emissions is replacing fossil-based electricity with fossil-free electricity. 

Oliver Bate, CEO of Allianz 
“Allianz invests policyholder funds in renewable energy and owns more than 100 wind and solar farms. I am delighted that today we are opening our first direct investment in an offshore wind farm, together with BASF and Vattenfall. This underlines the ability of partnerships to catalyse action and bring climate solutions to life.” 

Allianz is committed to achieve net-zero emissions by 2050 in its proprietary investment and Property & Casualty underwriting portfolios and already by 2030 within its own operations.   

Biodiversity at heart 

Several innovative techniques were used during the construction of Hollandse Kust, like a double bubble screen to dampen underwater noise during pile driving to limit the impact for harbor porpoises. Enlarged water replenishment holes in the foundations offer shelter for marine life inside the turbines, the first time the structure of a turbine itself is included in nature inclusive wind farm design. Boulders and rocks of varying sizes were used during the construction of scour protection. At several scour protection sites artificial rock reefs were added to make them more attractive to a wider number of fish, crabs and crustaceans. 

Circularity – recyclable blades 

Three turbines are fitted with recently developed recyclable blades. The resin used to ‘glue’ blades together will be easier to dissolve after the working life of the turbines, making it easier to disseminate the blades and reuse the different elements. 

Hollandse Kust Zuid is a key project in the ambitious goals that Dutch government has set to combat climate change and to provide the Netherlands with renewable energy for the next generation. In 2018, Hollandse Kust Zuid was awarded as the first subsidy-free wind farm in the world.

Grid connection  

Two offshore substations connect Hollandse Kust Zuid to the Dutch grid. These grid connections have been developed and will be operated by the Dutch TSO TenneT. As part of the Dutch offshore wind policy grid connections are publicly funded, which ensures standardisation and subsequent cost savings. It gives wind farm developers certainty that they will not have to adjust their designs later. 


  • Each turbine has a capacity of 11 MW.
  • The tip height is 225 meters above sea level.
  • Rotor diameter is 200 meters
  • Each blade is 97 meters long
  • Weight of foundation:735-955 tons
  • Length of foundation:62-75 meters
  • Diameter foundation: 7-8 meter
  • Seabed at a depth of 17-28 metres
  • 315km of 66kV inter array grid cables
  • HKZ covers an area of 225 km2

Header photo: From left to right: Helene Biström (Senior Vice President, Head of Business Area Wind Vattenfall), Martijn Hagens (CEO Vattenfall Netherlands), His Majesty King Willem-Alexander, Martin Brudermüller (Chairman of the Board of Executive Directors of BASF) and Oliver Bäte (CEO Allianz) Photo credit: Jorrit Lousberg/Light at Work Photography

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Vattenfall generates and supplies electricity, heating, cooling and gas as well as offering customers a variety of sustainable solutions. Vattenfall want to achieve fossil-free energy generation within one generation. This Swedish energy company is investing heavily in wind energy to achieve this aim. We are working towards a sustainable world, for now and in the future.