50hertz

50Hertz Transmission GmbH, commonly referred to as 50Hertz, is a German transmission system operator (TSO) responsible for the high-voltage electricity transmission network in the eastern part of Germany. The company operates the 50 Hz alternating current grid at voltage levels such as 380 kV and 220 kV, enabling long-distance power transmission and cross-border interconnections with neighboring countries. Its activities include system operation, grid planning, and the integration of renewable energy sources, including offshore wind connections and onshore generation, into the national and European grid.

50Hertz is one of Germany’s four TSOs, alongside Amprion, TenneT TSO, and TransnetBW. The company is owned by the Elia Group, a Belgian energy company, after Elia completed its acquisition in 2016. As a member of the European market and grid framework, 50Hertz collaborates with other TSOs within ENTSO-E, participates in regional grid development, and adheres to European and German regulatory standards. The regulator responsible for oversight in Germany is the Federal Network Agency (Bundesnetzagentur).

Headquartered in Berlin, 50Hertz maintains regional operations across the eastern German states to manage day-to-day grid reliability, outage management, and maintenance of the high-voltage network. The operator also engages in long-term planning to accommodate accelerating renewable deployment and to enhance cross-border interconnections, contributing to the European energy transition and market integration.