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).

Explore our key tasks


TenneT presents Hub and Spoke concept for large scale wind energy on the North Sea.

Read more
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.

Explore our grid

Grid maps

Maps of our onshore and offshore high-voltage grid.

To grid maps
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.

Explore the electricity market

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.

Read more

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.

Explore our company

We are TenneT

Meet us

Market news

All market and customer related news.

Latest market news

New date for start of NordLink commercial operation

The date for when the NordLink interconnector starts commercial operation needs to be updated by TenneT and Statnett. Originally it was planned to start market operation on 1st December 2020 with delivery as of 2nd December. Due to technical challenges encountered during the last transmission tests TenneT and Statnett need one more week for testing. This means, that market operation will start 8th December with delivery as of 9th December. Updated market messages will follow when further information becomes available.

Commercial operation of NordLink – start-up phase

In December 2020, the TSOs Statnett and TenneT will start the commercial operation of NordLink, the new interconnector between Norway and Germany. According to plan, market operation will start 1st December with delivery as of 2nd of December. This depends on the successful completion of the transmission test phase, and the exact date will be confirmed in a later message. For system security reasons a maximum transmission capacity of NordLink of only 700 MW can be offered to the markets initially for a maximum duration of up to four weeks. As soon as the maximum transmission capacity of NordLink can be increased to 1.400 MW, we will inform the market participants. The requirements of the German action plan will still be respected.

Commercial operation of NordLink - capacity calculation

In December 2020, the TSOs Statnett and TenneT will start the commercial operation of NordLink, the new interconnector between Norway and Germany. The exact date will be published in a later message as this depends on the successful completion of the transmission test phase. According to current plan, market operation will start 1st December.

The NordLink capacity, that will be given to the day ahead and intraday market coupling, is the outcome of TenneT´s and Statnett´s capacity calculation process. On the German side, this includes the obligation of the German Action Plan to offer a minimum percentage of capacity per critical network element for cross-border trades.
The table below shows the linear trajectory of these minimum percentages to be applied  on the critical network elements for NordLink from start of commercial operation in 2020 until 70% are reached by 31.12.2025: 

year% of capacity per critical network element
from 31.12.2025 onwards70
Applies from delivery day 28.08.2020: Market info on Baltic Cable

Under coordination of Bundesnetzagentur the system operators Baltic Cable AB, Schleswig-Holstein Netz AG and TenneT TSO GmbH jointly developed an interim solution for the Baltic Cable (constituting the bidding zone border DE/LU – SE4) to meet the minimum transmission capacity according to the German Action Plan in line with article 15 of EU regulation 943/2019 (of 248 MW during the year 2020). The interim solution provides the possibility to apply costly remedial actions in order to avoid the day-ahead transmission capacity of BC to fall below the required minimum capacity. 

Info East-Coast Project ("Mittelachse")

Once TenneT and Energinet have successfully commissioned the new common 400kV-connection as replacement of the existing common 220kV-connection between substation Kassö (DK1) and substation Handewitt – replacement of substation Flensburg – (DE/LU) within the frame of the so called East Coast Project (“Mittelachse”), TenneT’s Guaranteed Hourly NTC will change according to TenneT’s Commitment towards DG Competition as follows.

Under the principle of a linear trajectory, the TenneT Guaranteed Hourly NTC shall be increased by equal yearly steps corresponding to the overall increase of the East Coast Line (575 MW) (“Mittelachse”) divided by the number of calendar years between (i) 1 January following the commissioning of the East Coast Line (“Mittelachse”) and (ii) 1 January 2026 resulting in annual increases of 96 MW. Thus, TenneT’s Guaranteed Hourly NTC increases from currently 1,300 MW to 1,396 MW by 1 January 2021.

Note that the maximum NTC was changed from 1,500 MW in southbound direction and 1,780 MW in northbound direction to 2,500 MW of either direction with the date of commissioning the new common 400kV-connection. 

Further note that the applicable NTC to determine the offered capacity is the hourly minimum of TenneT’s and Energinet’s individual hourly NTCs. TenneT’s hourly NTC is still subject to daily capacity calculation that could result in any value between TenneT’s Guaranteed Hourly NTC and the maximum NTC being in accordance with the requirements from the German Action Plan according to article 15 of regulation (EU) 943/2019. Energinet’s NTC is in the sole responsibility of Energinet and not affected by TenneT’s Guaranteed Hourly NTC or the German Action Plan.

TenneT’s Guaranteed Hourly NTC will further increase with the future commissioning of the West Coast Line by means of a linear trajectory of additional 750 MW.

FCR cooperation reaches first milestone in the development of Europe's largest FCR market

Announcement: Successful go-live of daily D-2 auctions for FCR

On June 27, the FCR cooperation, which consists of 50Hertz, Amprion, APG, Elia, Energinet (non-active member), RTE, Swissgrid, TransnetBW, TenneT Germany and TenneT Netherlands, took a first step towards the implementation of a new FCR market design to procure nearly half of the FCR capacity in the synchronous area. In addition to shortening the product length from one week to one day, the cooperation introduces a marginal pricing system. Within this framework, a complex allocation algorithm was developed on the basis of an optimization based on constraints, which takes different price zones into account.

The goal of the further development is a reduction of procurement costs as well as the creation of entry incentives for new standard service providers and technologies.

The FCR cooperation is the first regional cooperation to implement market harmonization using the method prescribed by the Guideline on Electricity Balancing (EBGL). The development path was developed with the involvement of stakeholders and regional cooperation regulators.

During the last two years, two consultation rounds have been carried out, during which detailed proposals have been developed and reports evaluated. The development resulted in a final proposal according to Art. 33 of the EBGL, which was approved by all participating national regulators.

In the course of the further procedure, product time slices of four hours are expected to be introduced in July 2020. In addition, the time of the market close is to be brought closer to the delivery period.

Harmonised Allocation Rules review of main body and regional annexes

This consultation is based on Article 6 of Commission Regulation (EU) 2016/1719 (FCA Regulation) and concerns the review of Harmonised Allocation Rules in accordance with Article 68(5) of these rules. Together with the Harmonised Allocation Rules main body all annexes which propose amendments will be consulted.

More information

Core FB MC Market Design is finalised for implementation - Flow-Based Market Coupling to be implemented in the Core Capacity Calculation Region

Vienna, Brussel, Zagreb, Prague, Paris, Berlin, Budapest, Luxemburg, Amsterdam, Warsaw, Bucharest, Bratislava, Ljubljana, 17 April 2019

According to article 20 of the Commission Regulation (EU) 2015/1222 establishing a guideline on capacity allocation and congestion management (CACM Regulation), a Flow-Based market coupling for the day-ahead timeframe has to be implemented in the Core capacity calculation region (Core CCR). The project parties involved in the Core Flow-Based Market Coupling project have finalised the Market Design for Implementation. The current planning foresees the go-live of Flow-Based Market Coupling in the Core CCR in Q4 2020.

Flow-Based Market Coupling is currently deployed within the Single Day-Ahead Coupling across Central Western Europe (CWE) covering Austria, Belgium, France, Germany, Luxemburg and the Netherlands.

With the Core Flow-Based Market Coupling project, all borders of the Core CCR will be coupled based on a Flow-Based capacity calculation methodology developed in the framework of the CACM Regulation.

About the Flow-Based Market Coupling project in Core

The Core Flow-Based Market Coupling project promotes the development and implementation of a Flow-Based day-ahead market coupling across the whole Core capacity calculation region (Core CCR) in the framework of the Single Day-Ahead Coupling (SDAC). The Core CCR consists of the bidding zone borders between the following EU Member States’ bidding zones: Austria, Belgium, Croatia, the Czech Republic, France, Germany, Hungary, Luxemburg, the Netherlands, Poland, Romania, Slovakia and Slovenia.

CCR Hansa TSOs’ announcement on the release of ID capacities

The CCR Hansa TSOs decided to offer left over capacities to the extent possible at 18:00 (with no guarantee that full leftover DA capacities will be provided to the ID market). In the following paper, the CCR Hansa TSOs outline the reasoning for the release of intraday capacities at 18:00.

More information in the press release

Minimum available hourly capacities for DE-DK West according to Joint Declaration and TenneT’s Commitment

According  to the Joint Declaration from the Danish Ministry of Energy, Utility and Climate and the German Economic Ministry in June 2017 on increasing the electricity trade between the two countries (see press release http://www.bmwi.de/Redaktion/DE/Pressemitteilungen/2017/20170614-deutschland-und-daenemark-einigung-auf-stromhandel.html and https://en.efkm.dk/news/news-archive/2017/jun/denmark-and-germany-agree-on-increasing-electricity-trade-between-their-countries/) and TenneT’s commitment towards the European Commission (see press release: https://www.tennet.eu/de/news/news/tennet-begruesst-entscheidung-der-eu-kommission-fuer-stromhandel-an-deutsch-daenischer-grenze/), the relevant Transmission System Operators of both countries, TenneT and Energinet, have agreed on the implementation of a joint countertrading program.

While Energinet and TenneT already met the requirements from the Joint Declaration since July 2017 for guaranteeing minimum available hourly capacities for both directions of the border DE/DK-West, TenneT needs to implement the additional demands from the commitment. Therefore, both Transmission System Operators have signed an extended agreement to support TenneT in meeting its commitments.

The minimum available hourly capacities are derived from both obligations. With respect to safeguarding system stability exceptions have been defined for reducing capacity guarantees. The minimum capacity applies for both trading directions in the day-ahead allocation. The table below shows the minimum available hourly capacities for the next periods:


Starting Date

Capacity according to Joint Declaration

New minimum available hourly capacity according to Commitment


900 MW

900 MW


900 MW

980 MW


900 MW

1.060 MW


1.000 MW

1.140 MW


1.000 MW

1.220 MW


1.000 MW

1.300 MW


1.100 MW

[1.300 – 2.625 MW]*



*Capacity depends on the commissioning of planned interconnectors East Coast Line and West Coast Line.