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

Offshore Outlook 2050

Already by 2030, the originally planned capacity of 15 gigawatts of offshore wind energy will increase to 20 GW.

To Offshore Outlook 2050
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
News News Corporate

“Greener” purchasing: TenneT and six other European transmission system operators make an appeal to suppliers

Downloads & Contact
  • Open letter calls for switch to sustainable products and solutions
  • A clear signal encouraging the market to deliver more environmentally friendly products

TenneT has joined six other European transmission system operators (TSOs) in an open letter to suppliers and service providers in the energy industry calling for sustainable products and solutions in this market. The goal is to enable the purchasing departments of the TSOs to make “greener” purchases in the future.

“As TSOs, we are at the centre of the energy transition by our societies and economies with the goal of creating a more sustainable and carbon-free world,” write the signers REN (Portugal), RED (Spain), Terna (Italy), national grid (Great Britain), elia group (Belgium) and Rte (France) as well as TenneT (Netherlands and Germany). The TSOs therefore share in the responsibility to act sustainably even beyond their core business and to reflect on the decisions made when purchasing materials and services.

As European utility companies, the seven TSOs would like to take the lead in this transition. The procurement departments wish to play a pioneering role with increasingly “green” purchases. This means placing a greater emphasis in the future on the factors of environment, biological diversity, recycling and social impact with regard to purchased equipment and services.

“We welcome and endorse new ideas for meeting conventional needs with innovative solutions,” say the seven TSOs. Almost all areas of business could become “greener” and more sustainable by investing in innovative technologies.

“All suppliers – established and new – are encouraged to contribute to this development. We will take this new trend into account in our future selection and/or awarding criteria,” declare the authors of the open letter, which TenneT alone has sent to roughly 2,600 companies that it works with. The spectrum ranges from painting companies to leasing companies to part suppliers.

TenneT itself has been certified according to DIN ISO 50001 since 2015 as an energy-efficient company and has established the goal of climate-neutral operation by 2025. The first measures on the way to this goal include optimisation of the company’s own energy consumption. In the area of transformers, for instance, all new and replacement units in the substations of TenneT Germany consume up to 90 percent less energy for their cooling systems.

Other measures consist of innovations in offshore grid connections that lead to fewer and smaller buildings and systems (meaning less consumption of copper, steel and energy), optimisation of overhead lines to reduce electricity transmission losses, low-energy outdoor lighting of facilities, smart building management and successive conversion of the fleet to electric vehicles. 

[Link to the open letter]

TenneT is a leading European grid operator (Transmission System Operator (TSO). We design, build, maintain and operate the high-voltage electricity grid in the Netherlands and large parts of Germany and facilitate the European energy market. We are committed to providing a secure and reliable supply of electricity, today and in the future, 24 hours a day, 365 days a year and to playing our role in driving the energy transition. We transport electricity over a network of approximately 23,500 kilometres of high-voltage connections, from wherever and however it's generated, to over 42 million end-users while keeping electricity supply and demand balanced at all times. With close to 5,000 employees, we achieve a turnover of 4.1 billion euros and a total asset value of EUR 23 billion. TenneT is one of the largest investors in national and international onshore and offshore electricity grids. TenneT makes every effort to meet the needs of society. This will require us all to take ownership, show courage and connect with each other.

Share this:

Do you want to know more?

Mathias Fischer

Spokesperson - Grid expansion onshore & offshore, sector coupling, energy policy Northern Germany, flexibility & innovations

+49 921 50740-4044


Do you want to stay informed?

Like the

facebook page

Go to Facebook page