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 22,000 kilometres of high-voltage lines, we cross borders and connect countries.

Explore our grid

Grid maps

Maps of our onshore and offshore high-voltage grid.

To grid maps
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

Programme Offshore Grid

By means of the National Energy Agreement, the Dutch government wants to achieve a substantial increase in the share of wind energy in the Netherlands’ energy mix. To increase offshore wind energy capacity, the government has designated three zones in the North Sea for the development of new wind farms.

Development of the offshore grid concept 

Developing the offshore grid could not be done by TenneT single-handedly. Therefore, TenneT started an intensive stakeholder consultation process end of 2014 until end of 2015. The consultation focused on technical and planning issues concerning the design, construction and realisation of the offshore grid infrastructure until 2023. The overall goal of this process is to optimise, together with the stakeholders, the offshore grid configuration and realisation against minimum societal cost. All topics and supporting information can be accessed via this link (101 mb). This download provides access to all information published during the consultation process.

Latest developments

Prior to the subsidy tender Borssele III and IV in September 2016 TenneT has published a number of updates:

Questions regarding the offshore grid can be submitted via  netopzee(at)tennet.eu again as of October 2016.

22 June 2016 the Interface Risk Inventory Session was held. This workshop was organised to create an inventory of the main interface risks from the wind farm perspective, to ensure TenneT is aware of all relevant interface topics at an early stage in the development process. TenneT wishes to thank all the participants of the Risk Inventory Session for their valuable contributions. The presentation and the report of the workshop are now available:

Downloads and FAQ

Questions received

Please be informed that currently no additional sessions are scheduled between TenneT and the sector with regards to the offshore grid development. If parties have further questions, these can be submitted via Netopzee(at)tennet.eu. TenneT can only engage in discussions to further clarify the process, or interpretation of items, directly related to the offshore model agreements. Download the latest version of the FAQ here.

Read more

Consultation process download

Download here an overview of all files resulting from the consultation process, both legal and technical sessions.

The technical consultation documents cover e.g. topics 66 kV Voltage level, Overplanting, and Shared services & data acquisition.

Download ZIP-file

Offshore agreements (models)

Download here all actual Offshore agreements (models) and line diagrams. Publication date September 13th, 2016.

Download ZIP-file


Consultation process for offshore grid development (417 KB, pdf, 12/19/2016)

Category: Downloads Factsheet
Consultation process for offshore grid development Download Download
KCD Net op Zee (Dutch only) (2 MB, pdf, 05/19/2016)

KCD Net op Zee (Dutch only) Download Download


Net op Zee

Voor vragen over het consultatieproces.

Service Center

0800 836 63 88

Jeroen Brouwers

Jeroen Brouwers

Media Relations

+31 (0)26 373 26 00