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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Transaction data exchange

Supplier time series totals, balancing group time series totals (via BIKO), supplier clearing lists

Supplier time series totals (DSO to supplier):

If the DSO has the allocation authorization for the balancing group of an entity responsible for a balancing group (BKV) for the supplier month to be invoiced, in relation to the points of delivery of a supplier (LF), then the DSO delivers the supplier time series totals per balancing group and per balancing area in the form of month time series to the LF by the 10th working day after expiration of the delivery month. Types must be managed separately, i.e. the energy quantities must be allocated to the corresponding time series types.

Supplier clearing lists (DSO to LF)
(For the control of transaction data following the delivery month):

In the case of a clearing process, the DSO supplies the LF with the LF clearing lists at the LF’s request. In this case, these are lists of the feed-in and draw-off points separated by metering points in a balancing area by allocating these to a time series type, supplier and balancing group.

Balancing group time series totals (DSO to BIKO; BIKO to BKV):

The DSO delivers the balancing group time series totals per balancing group and balancing area to the BIKO by the 10th working day after expiration of the supplier month in the form of monthly time series and using the corresponding time series types.

Forwarding of the balancing group time series totals by the BIKO to the BKV:

All balancing group time series totals transmitted by the DSO, which the BIKO has accepted, must be forwarded by the BIKO immediately, but no later than within one working day after receipt, to the respective balancing group manager (reflection).