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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Offshore 2030

By 2030, the originally planned capacity of 15 gigawatts of offshore wind energy will increase to 20 GW.

To Offshore 2030
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. 

To transparency pages

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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Curtailment means shortening in English and involves green power producers experimenting with dimming solar farms. This so-called curtailment means that during peaks in the electricity network, the feed-in capacity of a solar park is slightly reduced.

With this measure, we expect to be able to connect more parks to the grid in the future, even in places where there is currently no room according to the applicable standards.

At the moment, the basic principle is that producers of renewable energy can supply all their energy back to the grid even during peak generation periods. The highest peaks, on very sunny and/or windy days, generally occur only a handful of times per year. This means that the capacity of the electricity grid is not fully used during the rest of the year.

With curtailment, these highest peaks are artificially capped by dimming the output of the generation facilities. This allows the electricity grid to be used much more efficiently.