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 23,500 kilometres of high-voltage lines, we cross borders and connect countries.

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Grid maps

Maps of our onshore and offshore high-voltage grid.

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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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The first direct connection between power markets in Germany and Norway.



  • 623 km grid connection DC (HVDC)
  • Capacity: 1.400 MW at ± 525 kV DC
  • Onshore: 53 km overhead line (Vollesfjord to Tonstad/NO)
  • Offshore: 516 km subsea cable
  • Onshore: 54 km land cable (Büsum to Wilster/DE)

Grid connection points

  • Substation Wilster (DE)
  • Substation Tonstad (NO)

Project status

  • Commissioning in 2020

About NordLink

NordLink, the ,green link’, is the first direct power connection between Germany and Norway. The high-voltage DC link will enable the exchange of 1,400 megawatts of renewable energy – wind power from Germany and hydropower from Norway. NordLink is thus making a decisive contribution to the energy transition in Germany and Europe.

The exchange of energy via NordLink will increase security of supply for both the German and Norwegian electricity grids and will enable the exchange of renewable energy, in particular hydropower and wind energy, between the two countries. This will not just have a positive effect on energy prices, but will also push the integration of the European power markets further forward.


NordLink – the ,green link’

NordLink is being implemented as a high voltage direct current (HVDC) transmission between Germany and Norway with a route length of 623 km. Due to its length, direct current will be used to transmit the electricity through both cables (positive and negative poles), which are connected to converter stations at each end. Direct current is especially advisable over long distances and for large-scale transmissions of power. The converter stations will be built in Wilster, Schleswig-Holstein/Germany, and Tonstad in Norway. At these sites, the electricity is converted from direct (DC) to alternating current (AC) - or vice versa, depending on the direction of transmission - and fed into the German or Norwegian transmission grid in order to supply households and companies with electricity.

A driving force for the energy transition/integration of renewable energy

NordLink is a milestone in the realisation of the energy transition. With the incorporation of the project into the Federal Requirements Plan Act, the necessity and urgent need for the implementation of the project for the energy market has been established by law. The conferral of the status of ,Project of Common Interest’ by the European Union, in accordance with the new guidelines for trans-European energy infrastructure, underlines the high economic and energy-economical importance of the project at European level.

NordLink – the ,green link’ – creates a connection to the capacities of hydropower plants in Norway and will counteract bottlenecks in the German transmission grid. This interconnector increases facilities for the exchange of renewable energy and plays its part in the reduction of carbon emissions and achievement of climatic objectives.

NordLink has a capacity of 1,400 megawatts (MW) and can supply more than 3.6 million German households with renewable energy. This is equivalent to the same feed-in power as would be produced by 466 wind turbines at 3 MW each. This means that the capacity of the interconnector is slightly higher than that of a large conventional power station.

European market integration

NordLink is the first interconnector to provide a direct link between the Norwegian and German energy markets. This connection promotes the integration of the North-western European energy market, increases market efficiency and contributes to a stabilisation of energy prices.

,Storage´ of wind energy

Connecting Norwegian hydropower with German wind power provides benefits for both countries. Whenever a surplus of wind energy is produced in Germany, for example, it can be transmitted via NordLink to Norway. The reservoirs in Norway then serve as natural storage for wind energy as the water remains in the reservoirs. Conversely, Germany can import hydropower from Norway when demand is high.

German-Norwegian cooperation

The NordLink project will be implemented by the Norwegian TSO Statnett and DC Nordseekabel GmbH & Co. KG, each with 50% ownership. TenneT and KfW each have a 50% share in DC Nordseekabel. DC Nordseekabel is responsible for the construction and approvals on the German part of the project. NordLink will have a capacity of 1,400 MW (high-voltage direct current transmission) and will run between Tonstad in Norway and Wilster in Schleswig-Holstein/Germany.


Factsheet: Benefits (432 KB, pdf, 31/01/19)

Benefits of the NordLink interconnector

Factsheet: Benefits Download Download
NordLink - Technical Design (535 KB, jpg, 05/09/18)


NordLink - Technical Design Download Download
Factsheet: Technical Design (171 KB, pdf, 31/01/19)

Technical design of the first HVDC link between Germany and Norway

Factsheet: Technical Design Download Download
NordLink - Sections (1 MB, jpg, 31/01/18)


NordLink - Sections Download Download


Mathias Fischer

Spokesperson Corporate Communications Germany, Grid expansion offshore/onshore, energy policy

Also interesting


The Dutch and Norwegian electricity grids have been interconnected by the NorNed cable since 2008. The NorNed cable is 580 km long and has a capacity of 700 MW, making TenneT and our Norwegian counterpart Statnett the joint owners of the world’s longest high-voltage subsea direct current link.

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Since 2019 the Danish and Dutch high-voltage grid are interconnected via a high-voltage direct current submarine cable, the COBRAcable. The interconnector has a capacity of 700 MW and is around 325 kilometres long.

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The BritNed cable connects the Dutch and British energy markets.

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