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 23,000 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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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 41 million people.

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We are TenneT

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Overview of market processes

Challenges of the DSO with regard to the BIKO

According to the German Federal Network Agency, the distribution system operators are obliged to participate in the balancing group billing to the above extent. This is necessary to ensure the most complete, high-quality mapping possible of the energy quantities in a grid to balancing groups. Even if this data is defective, balancing-relevant data can be exchanged so soon after the end of the respective delivery month with a reasonable risk distribution between the distribution network operators and suppliers and those responsible for the balancing group.

Balancing group billing according to § 8 para 2 StromNZV is the responsibility of the transmission system operators in their market role as BIKO. In order to conduct balancing group billing, however, they are dependent on the provision of accurate and complete data by the DSOs. Errors already included in the total time series for the balancing groups supplied by the DSOs must be cleared up bilaterally between the DSOs and the balancing group manager.

More information

concerning market processes between the BIKO TenneT and the market role of DSO are availabe on the following pages:

Balancing areas

Balancing of a balancing area

Master data exchange

Transaction data exchange

Publication of communication parameters