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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First 916 MW grid connection



  • 200 km long and 800 MW capacity
  • 75 km onshore cable
  • 125 km offshore cable

Grid connection point

  • converter station Diele

Status of project

  • in operation since January 2015

About the project

With an output of 800 megawatts (MW), BorWin2 together with HelWin1 (576 MW) is the first large-scale offshore connection that TenneT has implemented and which has enabled more than one offshore wind farm to be connected to the power grid for the first time. Since January 2015, the 147 wind turbines of the two offshore wind farms Global Tech I and Veja Mate have been feeding large quantities of clean wind energy into the German power grid via BorWin2. In summer 2019, the grid connection of Global Tech 1 was transferred from BorWin2 to BorWin3

The distance between BorWin beta, the offshore platform in the BorWin2 grid connection project, and the  land is 110 kilometers. This makes BorWin beta the offshore converter platform furthest out at sea. The network connection is 200 kilometers long. To ensure that the electricity generated at sea can be transmitted efficiently, TenneT uses high-voltage direct current (HVDC) transmission at BorWin2. With this technology, large quantities of electricity can be transported over long distances with low losses. Electricity from the North Sea is transported to the mainland via a 125-kilometer submarine cable. The 75-kilometer-long underground cable runs from the landfall in Hilgenriedersiel to the network connection point Diele. The land route for BorWin2 was executed parallel to the route for the BorWin1 project. This bundling has made it possible to limit interference with nature and the environment.

Cornelia Junge

Spokesperson - Project Communication Offshore