Vattenfall starts construction of 1.5 GW Hollandse Kust Zuid offshore wind farm

Subscribe to our newsletter and get the latest news and business opportunities in your inbox

Swedish utility and energy developer Vattenfall AB has started the construction of the 1.5 GW Hollandse Kust Zuid (HKZ) offshore wind farm project located in the Dutch waters in the North Sea. 

The construction works for Hollandse Kust Zuid start with the installation of monopile foundations. Each foundation is designed specifically for the location where it will be installed. The heaviest and largest monopile weighs 955 tons and is 75 meters long, while the lightest and shortest foundation still weighs 735 tons and is 62 meters long. The monopiles will be installed in water depths varying from 17 to 28 meters.

An installation vessel transports the foundations to their offshore location and positions itself at the exact location. The ship's crane then lifts the monopile into the water and lowers it until it reaches the seabed at a depth of 17 to 28 meters. Once the foundation is in position on the seabed, a hydraulic hammer is used to drive the pile to the desired depth.

Vattenfall is building Hollandse Kust Zuid together with its recently announced partner BASF. The wind farm will be located approximately 18 kilometers off the coast of The Hague and Zandvoort, with the furthest turbines located 36 kilometers offshore. When fully operational, Hollandse Kust Zuid will be the largest offshore wind farm in the world. 

List of the country updates

Country updates

  • July 06, 2021

    GIGA Storage, Eneco partner for 24MW Buffalo battery energy storage project in Flevoland

    GIGA Storage is partnering with Eneco to build the largest battery storage project in the Netherlands. The GIGA Buffalo will have a capacity of 24 MW and 48 MWh. The construction of the project&...

    Read more
  • July 02, 2021

    Vattenfall divests 49.5% stake in Hollandse Kust Zuid project to BASF

    BASF and Vattenfall have signed a contract for the purchase of 49.5% of Vattenfall’s wind farm Hollandse Kust Zuid (HKZ) by BASF. The purchase price amounts to EUR300 million (US$357.9 million)...

    Read more
  • June 17, 2021

    Alternus Energy buys majority stake in Unisun Energy

    Alternus Energy PLC has acquired, for cash and shares, a 60% stake in Netherlands-based clean energy group Unisun Energy Holding B.V. The deal also provides a strong platform for Alternus to grow in t...

    Read more
  • June 14, 2021

    Worley received Engineering services contract for 200 MW Hydrogen project in Netherlands

    Worley has been awarded an early engineering services contract by Shell to support the development of a new 200 megawatt electrolysis-based hydrogen plant in the Netherlands.

    Read more
  • June 04, 2021

    382.7 MW Fryslan near-shore wind project to start operation at the end of the summer

    Completion of Ventolines' 382.7 MW Fryslan wind farm in Ijsselmeer lake in the Netherlands has been delayed due to bad weather, complex logistics, and the coronavirus pandemic. The 89-turbine pr...

    Read more

Share this update