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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Our infrastructure

The infrastructure that TenneT manages makes it possible to transport electricity via high-voltage power lines and substations, in all weather conditions.

Reliable electricity supply

The infrastructure that TenneT manages makes it possible to transport electricity via high-voltage power lines and substations, in almost all weather conditions. TenneT is responsible for the upkeep of all the infrastructure in the Netherlands above 110 kV and for the international connections. In a large part of Germany TenneT is responsible for the upkeep of the infrastructure above 220 kV and the offshore connections.

To guarantee a reliable electricity supply we have to carry out regular inspections and maintenance work, which we plan in consultation with the regional grid operators and our connected customers. 

We always try to assess the condition of our electrical installations without shutting them down. We draw up long-term maintenance plans based on the outcome of our inspections and do everything possible to lengthen the interval between maintenance work, without losing sight of the required availability.

The work is carried out by TenneT specialists who can detect faults in the network and assess how serious these are. Their observations are vital for assessing the quality of our equipment and we often adjust our maintenance strategy accordingly.


Our high-voltage grid

The high-voltage grid is the backbone of the electricity supply system, connecting electricity producers to consumers, connecting and integrating electricity markets.

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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.

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Maintenance strategy

The upkeep of the high voltage network is one of TenneT’s most important tasks. It reduces the risk of disruptions and ensures the security of the electricity supply.

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