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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160 kilometers long and 900 megawatt DC connection



  • 160 km long and 900 MW capacity
  • 30 km onshore cable
  • 130 km offshore cable

Grid connection point

  • converter station Emden/Ost

Status of project

  • in operation since August 2019

About the project

BorWin3 is the third project to be implemented by TenneT off the coast of Borkum using direct current technology in addition to the BorWin1 and BorWin2 grid connection projects. At the Emden/Ost site, TenneT set up a converter station with a transformer station to convert the energy generated at sea from direct current into three-phase current and feed it into the power grid from there. In total, a distance of 160 kilometers has to be bridged, whereby the wind power is first transported to Hamswehrum via a 130-kilometer long submarine cable to the west of Borkum and from there via a 30 kilometer long underground cable to Emden/East.

The foundation stone for the onshore converter station was laid in May 2016, and the station has been technically completed since 2018. The onshore cables were already laid in 2015, the last cable section was laid at sea in spring 2018. In September 2018, the offshore converter station manufactured in Dubai was transported to the North Sea and installed there in October (read more about its transport and installation in our German blog). Since August 2019, the 900 MW DC connection has been in operation.

Cornelia Junge

Spokesperson - Project Communication Offshore