Germany Invests Record €10B in Clean Energy Grid

Germany just made its biggest bet yet on renewable energy, and the numbers are staggering.

TenneT Germany invested a record €10.05 billion in 2025 to expand and modernize the country's electricity transmission grid. The grid operator is racing to connect massive offshore wind farms in the North Sea to homes and businesses across Germany.

The investment paid off quickly. Revenue jumped to €6.24 billion, while profits surged 44% to €1.57 billion compared to the previous year.

In the North Sea, TenneT completed two major offshore grid connection systems called BorWin5 and DolWin5. Once fully running, these connections will boost transmission capacity for offshore wind energy from 8 gigawatts to around 10 gigawatts, enough to power millions of German homes with clean ocean breezes.

The company also awarded a contract for BalWin5, a next-generation grid connection designed to cut the cost per megawatt hour of transmitted energy. Lower costs mean cheaper clean electricity for German families and businesses.

On land, construction crews are working across seven German states to build SuedLink and SuedOstLink, massive direct current transmission lines that will carry renewable energy from windy northern coasts to industrial centers in the south.

The Ripple Effect

This infrastructure boom is attracting serious money from around the world. In September 2025, three major investment firms committed up to €9.5 billion to support TenneT Germany's expansion plans.

Then in February 2026, Germany's state-owned development bank agreed to buy a 25% stake in the company for €3.3 billion. The deal shows how seriously Germany takes its clean energy future.

Tim Meyerjürgens, TenneT Germany's chief executive, emphasized what's at stake. "Robust electricity grids are essential for security of supply, competitiveness and economic stability," he said.

The investment represents more than just infrastructure. It's creating thousands of construction jobs, developing new technologies to transmit renewable energy more efficiently, and proving that the transition to clean energy can be profitable.

Germany is building the backbone that will carry renewable energy for generations to come.