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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Contractual basis and master data exchange

Contractual basis

Allocation agreement / authorization


The signing of the allocation agreement / authorization must take place before activation of the master data for balancing group totals and, in any case, before the delivery month. Cancellation, in each case, is possible on the first of a month with the observance of a cancellation notice of two months.


The allocation agreement includes descriptions of uniform processes and data formats which enable efficient communication and data transfer processes between the BKV and DSO. If the BKV and the LF is the same person, the allocation agreement is a module for the grid use contract or supplier framework contract.

In the allocation authorization, the BKV permits the registration of metering points in its balancing group. The most important contents are: 

  • Name, address, market partner ID of the supplier (as needed)
  • Name, address, market partner ID of the DSO
  • Name, address, market partner ID of the BKV - EIC control areas
  • EIC code for the balancing group, EIC code for the balancing area, DSO limitation to time series types
  • Start on
  • Change on (as needed)
  • End on (as needed)

Model: Sample allocation agreement

The allocation agreement / authorization is negotiated exclusively in written form and sent and received by post.

Master data exchange

Master data for balancing group totals and supplier totals must be activated before the delivery month and before the first time transaction data is sent. Activation takes place immediately after confirmation of the registration of the individual metering point by the DSO. The minimum deadline of 2 working days before sending transaction data should only be used in exceptional cases! The signing of the allocation authorization as an annex to the allocation agreement must be completed prior to activation.

You can find detailed information on master data exchange on the Page on master data processes.

Balancing group allocation lists (DSO to BKV) (for the control of master data prior to the delivery month):

If the DSO has a valid allocation authorization for the balancing group of a BKV for a delivery month, then the BKV can request a balancing group allocation list. This is sent by the DSO to the BKV after the 16th working day of the month preceding the delivery month, at the latest however by the end of this month.

The balancing group allocation list contains, on the basis of the data managed by the DSO, the active supplier allocations for each balancing area for the respective balancing group. The most important contents are: 

  • Market partner ID of the DSO
  • EIC code for the balancing area of the DSO
  • EIC code for the balancing group
  • Market partner ID for the supplier
  • Pure time series type of the supplier time series totals and metering point name
  • Metering point name of the balancing group total
  • Start of allocation
  • End of allocation

If the balancing group allocation list contains erroneous allocations of a supplier (LF) or of a time series type for the balancing group, then the BKV must initiate a clearing process. In doing so, it can ask the DSO to have the supplier’s allocation authorization submitted.

The illustration shows the named processes: