Grid Delays Stall German Offshore Wind

Germany has already built the kind of offshore wind fleet other countries still talk about. Across the North and Baltic seas, 10.8 gigawatts now turn on 1,764 turbines, enough to supply roughly 8.7 million households a year (Zeit, Focus). The problem is what comes next. Only about 2.6 GW of future projects have secured financing, a 2025 auction attracted no bidders, and as much as 16 GW of capacity, worth roughly €50 billion, may be stuck behind grid delays (FAZ, BalticWind). The engineering works. The investment case has gone cold.

Under Germany's offshore wind law, the target is 30 GW by 2030 and 70 GW by 2045 (WindSeeG). At 10.8 GW, the country is about a third of the way to the first mark. The industry now expects 30 GW to arrive around 2032 rather than 2030. Four things explain the delay.

Why the Next Wave Can't Get Built

Money got expensive. Offshore wind is a capital-heavy business: developers spend billions before the first unit of power is sold, then recover that money over 20 to 30 years. When the ECB, the eurozone's central bank, lifted its deposit rate from below zero to a peak of 4% in 2023, the economics changed quickly (ECB). Rates have since come down, but they are still far above the era of cheap money in which many existing wind farms were financed.

Equipment costs surged. EnBW, one of Germany's big utilities, says the cost of turbines, steel foundations, cables and specialist vessels rose 30% to 40% over five years (FAZ). The European Court of Auditors has separately warned about raw-material risks across the green-transition supply chain (ECA).

Auctions squeezed developers too hard. Recent German rounds asked developers to pay the state for the right to build, through what are known as negative bids. That looked tidy when financing was cheap and costs were predictable. Once the numbers moved, the model stopped working. The 2025 round drew no takers.

Grids aren't keeping up. Twenty-two completed turbines, with 323 MW of capacity, are sitting idle because the subsea cables linking them to shore are not ready (Zeit). TotalEnergies has reportedly reviewed concessions won since 2023 because of grid delays (The Equilibrium). The blockage is not only German. The Netherlands also depends on TenneT, the operator behind much of Germany's offshore transmission, and Dutch estimates put delivery of new high-voltage lines at 8 to 12 years (consultancy.nl, Energy Global).

Offshore Wind's Price Paradox

The awkward part is that wind can undermine its own business case. When wind and solar output is high, German wholesale electricity prices regularly fall below zero because the grid cannot absorb the surplus (Energy Charts). A wind farm then earns least at the moment it is producing most.

That is the tension at the centre of offshore wind. When it runs, it pushes power prices down, which is good for consumers. But developers need dependable revenue before banks will lend the billions needed to build. Cheap electricity reaches households only after someone has paid for the cables, the grid upgrades and the revenue floor that make construction financeable.

France has chosen one route through that problem. The European Commission approved a French offshore wind support scheme worth up to €63 billion, built around two-way contracts for difference over 25 years (BalticWind). Under that model, if the market price falls below an agreed floor, the state tops up the developer; if it rises above a ceiling, the developer pays money back. It narrows revenue swings and brings down borrowing costs. Germany's offshore wind association, BWO, wants Berlin to move in the same direction.

Germany is already paying heavily for a grid that cannot move enough power to where it is needed. It spends several billion euro a year on redispatch, which means paying power plants to raise or lower output because transmission capacity is constrained. The Bundestag recently approved a grid expansion plan worth roughly €44.65 billion to carry northern wind power south (Bundestag). Those costs eventually show up on electricity bills through network charges.

Developers face the immediate squeeze: they hold sites they cannot yet build profitably. Households will carry the wider cost through grid charges, while taxpayers may pay again if stalled concessions have to be re-auctioned. The 10 GW milestone shows offshore wind can deliver at scale. What has failed is Germany's zero-subsidy auction model, designed for a world of near-free borrowing. The next 20 GW will need cables in place before auctions and guaranteed minimum prices before construction begins.