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 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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Reserve power plants

In accordance with the provisions of the German regulation on reserve power plants (abbr. Reservekraftwerksverordnung - ResKV, s.4) Transmission System Operators are obliged to publish a call for interest when the regulatory authority (Bundesnetzagentur) has identified an additional requirement of generation capacity for the network reserve (ResKV, s.3).

Current calls for interest

In accordance with the provisions of the German regulation on reserve power plants (abbr. Netzreserveverordnung - NetzResVKV) dated 27th June 2013, the German regulatory authority Bundesnetzagentur has examined the requirement for additional reserve power for the network reserve as calculated by the transmission system operators for the winter periods 2018/2019 and 2020/2021, and has published the associated report in accordance with § 3 para 1 NetzResV.

According to the report by Bundesnetzagentur from April 27th 2018 there is no direct requirement for additional generation capacity for the network reserve. Thus, currently there is no requirement for the transmission system operators to launch a call for expressions of interest for the examined winter periods. 

Expired calls for interest

Delivery periodTender deadlineInclusion date of plants into network reserveRequirement in MW
Winter 2017/2018May 15th, 2017October 1st, 20171600
Winter 2019/2020May 15th, 2015October 1st, 20191600
Winter 2016/2017May 15th, 2015October 1st, 20163198-4212
Winter 2015/2016May 15th, 2015October 1st, 2015489-1388
1st quarter 2015October 15th, 2014January 1st, 2015545
Winter 2017/2018May 15th, 2014October 1st, 20173076
Winter 2015/2016May 15th, 2014October 1st, 20151414
Winter 2015/2016May 15th, 2014October 1st, 20151439
Winter 2014/2015May 15th, 2014October 1st, 201464


Harald Scherer

Holger Federmann