TenneT own and operate over 25,000 kilometres of high-voltage lines and cables.

As the Transmission System Operator (TSO) for the Netherlands, and a significant part of Germany, TenneT owns and operates over 25,000 kilometres of high-voltage lines and cables. We deliver electricity to 43 million domestic and business users, safely and reliably, 24 hours a day and 365 days a year. With over 7,400 employees in two countries, we are driven by our mission to ensure the lights stay on and that power is available, at the flick of a switch, whenever and wherever you need it. Find out more about our organisation

To do this, we design, build, maintain and operate a high-voltage grid stretching across land and sea. This carries electricity from where it is made – including a rapidly increasing proportion of wind and solar energy – to where it is used. We carry it over ground, underground, under the sea and across borders, over our rapidly expanding high-voltage grid. With a service level as high as 99.99963 %, we are one of the best in the world at our job.