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.

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.

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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

Meet us

Procurement policy

When it comes to purchasing products and services, TenneT’s procurement policy is based on European laws and regulations, our own corporate policy and best practices in procurement management.

When it comes to purchasing products and services, TenneT’s procurement policy is based on European laws and regulations, our own corporate policy and best practices in procurement management.  Transparency and non-discrimination underline all our purchasing processes. Key aspects of our purchasing policy include:

General terms and conditions of purchase

We have set up general terms and conditions of purchase. Additional agreements may be concluded for specific products or services.

Cost of ownership

We strive to control and reduce the total cost of ownership, aiming for the ‘most economic offer’: an optimum balance between quality, cost and service life.

Encouraging free-market operation

We encourage fair and free operation of the market to ensure a sufficient and competitive supply of the wide range of specialized products and services that we purchase.

Purchasing contracts

Expenditure on products and services is covered by purchasing contracts, which are drawn up in a clear and professional manner. We enter into various types of short-term and long-term contracts and recognition arrangements. These are recorded in our vendor base along with those suppliers who meet our requirements.

Principles of Procurement

General Terms and Conditions of Purchase (245 KB, pdf, 20/08/18)

General Terms and Conditions of Purchase Download Download
Supplier Code of Conduct (73 KB, pdf, 16/04/19)

Supplier Code of Conduct Download Download

Contact Purchasing Germany (Supply Chain Management)

general requests

Contact Purchasing Netherlands (Supply Chain Management)

general requests


Procurement procedures

TenneT follows various procedures when purchasing products and services. These are laid down in European law and in our corporate procurement policy.

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Financial reports

TenneT publishes integrated reports, including financial statements and key figures, on an annual and semi-annual bases that give an insight into our financial and operational performance.

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Safety at TenneT

TenneT attaches great importance to safety. Every day we are aware of the risks associated with our activities. TenneT wants every employee to return home safely at the end of each working day.

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