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 23,000 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 41 million people.

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We are TenneT

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Procedure and lead time

In the case of a new connection, TenneT will discuss the possibilities with you, and together we will explore, if necessary with the regional grid operator, what the best connection option is for your particular situation.

We will then produce a technical plan for this, accompanied by an offer. After the order has been placed, TenneT will create the connection. As soon as the connection is delivered, it will be put into service. On average it takes 12 to 18 months to create a new connection to the high-voltage grid (in a situation where expansion of the grid is unnecessary). Soon the TenneT website contains more information about the steps in the connection process.

1. Information phase

This phase is used to hold talks with the customer. Based on the outcome, TenneT will make a quick scan so as to identify the substation to which the customer can be connected, provide a rough timeline for doing this and estimate the total costs. On request TenneT will also submit an offer for a basic design.

2. Basic design phase

The basic design will work out the request for a connection in greater detail, including a project description, planning aspects, licences and the technical properties of the connection. Subject to approval, this phase will end with signature of the construction agreement, in which the planning and the costs will be agreed.

3. Construction phase

This phase formally starts at the time of signature of the construction agreement. In many cases, the call for tenders for installation of the connection will already have started, so as to enable the contract to be awarded as soon as the construction agreement has been signed. Throughout the entire construction phase, TenneT will hold regular talks with the customer for example to close an Connection and Transport agreement.


Connecting to the Dutch high-voltage grid (986 KB, pdf, 05/13/2019)

Connecting to the Dutch high-voltage grid Download Download


Customer contact

Customer Care Center: For customers of TenneT Netherlands only.