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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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 42 million people.

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Changes in contracting Incident Reserve and Regulating Power

Hereby TenneT wants to inform the market on the upcoming changes in the process on contracting of Incident Reserve and Regulating Power.

Hereby TenneT wants to inform the market on the upcoming changes in the process on contracting of Incident Reserve and Regulating Power.

Week- and Daycontracts Incident Reserve and Regulating Power

On January 2nd , 2020 the Dutch regulator (Autoriteit Consument & Markt) has informed the market regarding the decision (link)  to approve TenneT's request to postpone the startdate of daily tenders for Incident Reserve (mFRRda) and Regulating Power (aFRR). The regulator has approved TenneT's proposal for postponement of daily tenders  until September 1st 2020.

In the "Staatscourant" number 28764 d.d. May 28th, 2020 (publication date May 29th, 2020, link) a revision of the Netcode has been published, which includes changes on the maximum  contract period for aFRR and mFRRda. From June 1st, 2020 the maximum contract period is one week, and from September 1st, 2020 the maximum contract period is one day.

Weekly contracts for aFRR and mFRRda will be closed every Wednesday, in the week before the delivery week.

From September 1st , daily contacts will be closed on the day before the delivery day, including weekends and holidays. Balancing Service Providers (BSPs) can send their offers using either the APFAS webportal or the B2B connection with TenneT.

Offers Symmetrical aFRR

As of January 1st, 2021 the exemption for the procurement of asymmetrical FRR expires, for that reason it will no longer be possible to combine upward and downward offers into a symmetrical offer. Therefore from delivery day January 1st 2021, all offers for aFRR and mFRRda need to be offered separately for upward- and downward regulation.


Generic information regarding the ancillary services, dimensioning of the volumes of mFRRda and aFRR and the procurement process can be found via the following link:


If there are any questions regarding the above mentioned changes you can contact us by sending an e-mail to: apfas(at)tennet.eu

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