All 64 machines at a 960 megawatt offshore wind farm in the German North Sea were set without any state subsidy behind them, but a rotor blade let go three weeks before the last one went up

Open water about 53 miles northwest of the nearest German island, and nothing in any direction but towers.

Sixty four of them now, the last one bolted up in the middle of August.

Each carries a rotor 774 feet across, which sweeps close to eleven acres of air every turn.

This is the first commercial home for the 15 megawatt class, and its operating record becomes the baseline every other developer will price against.

The water under them is only around 130 feet deep, which is what made the whole thing buildable.

No public money went into it.

That is the part nobody had done at this scale.

What a 774 foot rotor demands of the steel below

A rotor that size does not mainly press down. It pushes sideways, and it never stops.

Wind on a spinning disc that wide produces a constant horizontal thrust at the top of a tower whose hub sits 466 feet above the sea.

That force travels straight down the shaft into the seabed as a bending moment, trying to topple the structure the way a lever works.

The answer is a single steel tube driven into the seabed, weighing roughly 1,500 short tons and stretching about 30 feet across at its widest.

There is no jacket, no piled frame and no concrete. One pile, one turbine, driven and capped.

Depth is what makes that possible, because shallow water forgives a simple foundation.

What the row looks like from a service boat

From the deck of a supply boat the towers do not read as a field. They read as a colonnade.

They stand roughly half a mile apart across about 24 square miles of open sea, each one taller than almost anything on the German mainland.

Up close the scale stops working. A single blade runs 379 feet from root to tip, longer than an American football field.

Watching one rotate overhead from a maintenance deck is less like watching machinery and more like watching weather.

The first tower went in during the spring of last year and the sequence started with the foundations rather than the towers.

Steel goes into the seabed a full season before anything spins.

The order the numbers actually came in

First power reached the German grid while fewer than half the machines were up, which is normal for a build this size and unusual to say out loud.

That early connection was the real test, because it proved the subsea link rather than the turbines.

The full build proceeded without public funding, which is rare for offshore wind at this scale in Europe today.

Revenue was locked in before construction began, through long term supply agreements with industrial buyers at market rates.

One of those runs fifteen years and commits 100 megawatts to a global technology company, and the rest are spread across steel, rail, chemicals and an airport operator.

Total investment came to roughly 2.8 billion dollars, carried by private balance sheets.

The blade that came off in July

At the end of July a rotor blade on one of the machines failed, and a section of it went into the sea.

The piece that drifted away was about 66 feet long, and it floated just below the surface, which made it nearly invisible to shipping.

Work vessels on site could not recover it. The German Federal Police took the job, towed it to a patrol boat, hauled it aboard over the stern and landed it in Cuxhaven three days later.

The manufacturer has said the investigation narrowed to a specific area of the blade and that no root cause has been determined.

Installation of the remaining machines finished about three weeks after the failure, which is a schedule decision rather than a clearance.

Cables and connections are usually the quiet risk offshore, as at a Dutch project choosing a cable maker on sustainability grounds.

The recovery and the hazard to navigation are described by an industry outlet.

A completed field with an open investigation is not a finished project.

What 64 first units mean for everything after

This is the first commercial home for the 15 megawatt class, and its operating record becomes the baseline every other developer will price against.

Larger machines need fewer foundations, fewer cables and fewer crew rotations per unit of output, and that arithmetic is what drives the industry.

The counterweight is exactly what happened in July. One blade failure at this size puts a hazard in a shipping lane and takes a police vessel to clean up.

Monitoring what these machines do to the water around them is a separate open question, the way three floating turbines off Portugal were instrumented for it.

The completion date and the manufacturer’s wording on the investigation appear in the trade coverage.

The field is standing and the useful number is not the rating, it is how it runs across a full winter.