TenneT Germany invested a record €10bn in the expansion and modernisation of Germany’s electricity transmission grid during the 2025 financial year.
Underlying EBIT rose 44% year-on-year to €1.57bn while underlying revenue reached €6.24bn, the company said.
It added that the regulated asset base increased 32.4% to €36.79bn as the company accelerated its grid expansion programme.
In the North Sea, TenneT Germany completed the BorWin5 and DolWin5 offshore grid connection systems.
The projects will increase transmission capacity for offshore wind energy in the German North Sea from eight to around 10GW once fully commissioned.
The company also awarded the BalWin5 offshore grid connection system, which it said will set new efficiency standards and reduce the cost per transmitted megawatt hour.
Onshore, construction is underway on the SuedLink and SuedOstLink direct current transmission connections across seven German federal states.
“With our investment programme, we are driving forward grid expansion both onshore and offshore and are actively shaping the energy system of the future,” said Tim Meyerjürgens, chief executive of TenneT Germany.
“Robust electricity grids are essential for security of supply, competitiveness and economic stability.”
TenneT Holding agreed equity investments in September 2025 from APG, GIC Private Limited and Norges Bank Investment Management that could provide up to €9.5bn for TenneT Germany.
In February 2026, Kreditanstalt für Wiederaufbau agreed to acquire a 25.1% stake in TenneT Germany for €3.3bn, with the transactions expected to close in mid-2026 subject to regulatory approvals.