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We are primarily tasked with providing power transmission services, system services and facilitating the energy market. Our core tasks follow from our appointment as grid operator under the Dutch 'Elektriciteitswet' (E-wet) and the German 'Energiewirtschaftsgesetz' (EnWG).

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TenneT presents Hub and Spoke concept for large scale wind energy on the North Sea.

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Our grid

TenneT manages the high-voltage grid in the Netherlands and large parts of Germany. TenneT transmits electricity at 110,000 volts (110 kV) and higher. With around 23,500 kilometres of high-voltage lines, we cross borders and connect countries.

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Offshore Outlook 2050

Already by 2030, the originally planned capacity of 15 gigawatts of offshore wind energy will increase to 20 GW.

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Electricity market

The energy sector is developing rapidly. The process of European market integration began some years ago. Its purpose is to create a single European market that enables market parties to trade gas and electricity across national borders easily and efficiently.

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We provide transparency data on our operations on our Dutch and German transparency page and on ENTSO-E. 

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Our vision is to be one of the most transparent Transmission System Operators (TSO) in Europe and thereby creating value for society. In this Energy Insights section we present selected energy related topics and show data, information and valuable insights. 



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TenneT is a leading European electricity transmission system operator (TSO), with activities in the Netherlands and in Germany. We strive to ensure a reliable and uninterrupted supply of electricity in our high-voltage grid for some 42 million people.

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ENGIE Fabricom-Iemants consortium wins tender for Hollandse Kust (north) offshore platform

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A consortium of the Belgian companies ENGIE Fabricom and Iemants will supply the offshore platform for the Hollandse Kust (North) wind farm. TenneT had put out a tender for this. The tender also includes the option for the Hollandse Kust (west alpha) and Hollandse Kust (west beta).


A wind farm with a total installed capacity of at least 693 MW to a maximum of 760 MW will be built in the Hollandse Kust (north) wind zone. The contract is for the design, engineering, production, delivery, transport and installation of an (unmanned) offshore platform.

It concerns both the jacket foundation and the topside. The topside will measure 47 m (l) x 35 m (w) x 25 m (h) high (excluding antenna tower and top deck crane) and will weigh around 4,100 tons. The weight of the jacket is approximately 1,930 tons. On the platforms, the 66 kV voltage of the future wind turbines will be converted into 220 kV. The platform is connected to the land by two 3-wire 220 kV AC export cables and where necessary 1-wire 220 kW land cables.

The platform is the standardised 700 MW offshore connection concept introduced by TenneT. TenneT is building 5 identical platforms for the 2023 programme, which will transport a total of 3500 MW of wind energy to the mainland.

The contract is for the platform for Hollandse Kust (north), with the option for Hollandse Kust (west alpha) and Hollandse Kust (west beta).

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Franscé Verdeuzeldonk

Media relations

+31 (0)26 372 26 00


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