Our key tasks

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 24,500 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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Transparency data

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. 



Facts & figures related to TenneT facilitating the market can be found here.

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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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We are TenneT

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Programme 2023

Between now and the end of 2023, TenneT will realise 3,500 megawatts (MW) of offshore connections, in a standardised concept of 700 MW per connection. This will make an important contribution to the Energy Agreement signed in 2013.


The offshore grid transports wind energy generated offshore to the mainland’s electricity grid. This occurs from three wind energy areas in the North Sea. These are the Borssele, Hollandse Kust (south) and Hollandse Kust (north) wind energy areas. The government has designated these areas for generating more sustainable energy. Together the wind energy areas yield enough electricity for 5 million households.

  • Energy Agreement 2013
  • 5 x 700 MW = 3.5 GW
  • Standardised concept
  • AC connections (alternating current)



  • 2019 700 MW Borssele Alpha
  • 2020 700 MW Borssele Beta
  • 2021 700 MW Hollandse Kust (zuid) Alpha
  • 2022 700 MW Hollandse Kust (zuid) Beta
  • 2023 700 MW Hollandse Kust (noord)

Offshore platforms

Platforms make up an essential part of the offshore grid. TenneT is building 5 identical platforms for the 2023 programme, to transport a total of 3,500 MW of wind energy to the mainland.
Standardising these platforms will produce a substantial reduction in the costs of development, construction and maintenance.

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More information


Factsheet Offshore tender system (435 KB, pdf, 08/08/19)

Factsheet Offshore tender system Download Download