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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Grid expansion

To be able to transmit all the electricity generated by these new power plants, TenneT is carrying out a large-scale expansion programme.

Increased transport capacity in the Netherlands

The number of electricity producers connected to the Dutch grid has grown significantly since 2006. The boom was initiated by the Dutch greenhouse industry, which deployed over 2,000 MW in new small-scale combined heat and power (CPH) plants in the period to 2010. Several large power plants were also constructed in recent years, increasing the installed production capacity by more than 10,000 MW in 2014 (a rise of over 40%). This is more than enough to meet Dutch domestic demand and exports until far beyond 2020. It is therefore unlikely conventional production capacity will be expanded any more in the next five to 10 years.

To be able to transmit all the electricity generated by these new power plants, TenneT is carrying out a large-scale expansion programme. This mainly  involves constructing new 380 kV connections in the Randstad area (Amsterdam, Rotterdam, Utrecht and The Hague) and in the north and southwest of the country.

Transition to renewable energy

To enable the transition to renewable energy, in line with Dutch government sustainability targets, TenneT has started preparations to build an offshore high voltage grid (3.500 MW) along the Dutch coast, facilitating the connection between offshore wind farms to the onshore high voltage grid. This is likely to be finished by 2023.

Modernisation of the existing grid

To ensure that the extra-high voltage grid operates safely around the clock and every second, the existing grid network must be modernised and regularly maintained. For example, old lightning protection cables are replaced with new ones with integrated optical fibers. In order not to jeopardize the security of supply during the work, this is often done during operation. TenneT is also making an important contribution to the success of the energy transition with the modernisation of its existing grid network.

In case of questions

Customer contact

Customer Care Center: For customers of TenneT Netherlands only.

Contact Grid connection

For German customers only. Please address all questions on this topic here.


Security of supply

A secure and continuous supply of electricity is the key objective of our operations.

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System services

System services are the services TenneT provides to guarantee the flow of electricity in the Netherlands and large parts of Germany.

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Transport services

TenneT transports electricity along the high-voltage grid from where it is produced to where it is consumed.

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