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 over 22,000 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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Net op zee Borssele

The grid connection of the Borssele offshore wind area will be 1400 megawatts (MW), consisting of two connections each of 700 MW. The Borssele grid connection will comprise two platforms that TenneT will build (called Alpha and Beta).

Each platform will process the electricity generated by two wind turbine sites, and will provide 700 MW via two cables (alternating current). The four offshore cables will be routed via the Western Scheldt river and will come ashore near the existing high-voltage substation at Borssele, where they will be connected to the substation via underground 220 kV cables. The Borssele substation will be expanded to create extra room for the transformers required to convert the voltage level from 220 kV to 380 kV. The national 380 kV high-voltage grid will then distribute the wind energy to households across the country. Borssele Alpha will go into service in 2019 and Borssele Beta in 2020. 

Graphical representation of an offshore grid connection

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Service Center

0800 836 63 88

Jeroen Brouwers

Jeroen Brouwers

Media Relations

+31 (0)26 373 26 00


Programme offshore grid

By means of the National Energy Agreement, the Dutch government wants to achieve a substantial increase in the share of wind energy in the Netherlands’ energy mix. To increase offshore wind energy capacity, the government has designated three zones in the North Sea for the development of new wind farms.

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Net op zee Hollandse Kust (zuid)

The grid connection of the future 'Hollandse Kust (zuid)' offshore wind area will be 1400 megawatts (MW), consisting of two connections each of 700 MW.

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Offshore projects Germany

TenneT is investing heavily in Germany to connect offshore wind farms in the North Sea to the German high-voltage grid.

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