Denmark's Largest Wind Farm Halfway Done Before Winter

A ship called Brave Tern is doing something remarkable 14 miles off Denmark's coast. It's lifting wind turbines nearly 500 feet into the air, one massive piece at a time, in the middle of the open ocean.

Half of the 72 turbines at Denmark's Thor offshore wind farm are already standing tall in the North Sea. The race is on to install the rest before winter weather makes the work impossible.

Each turbine stands as tall as a 48-story building, with blades longer than a football field. The ship doing the lifting isn't your typical vessel either.

Brave Tern is a jack-up ship that drops legs to the seafloor and lifts its entire hull out of the water. That transforms it from a floating boat into a stable platform where cranes can work without worrying about waves.

The ship carries three complete turbine sets at once, sailing from port to the wind farm site and back again. Each turbine arrives in sections: tower, engine housing, and those enormous blades. The crew assembles each machine in the air, piece by piece, then moves to the next foundation and starts over.

Those foundations were driven into the seabed a year earlier. Each steel tube runs 330 feet long and weighs up to 1,500 tons, driven straight down with no room for error. The landing flange where the tower bolts on is part of that original pile, so if it leans even slightly, there's no fixing it later.

The Thor wind farm will generate 1,080 megawatts when complete, making it Denmark's largest offshore wind installation. That's enough clean electricity for more than one million Danish households.

The Ripple Effect

Power is already flowing. The first turbines started feeding Denmark's grid back in March 2026, months before the halfway point. Every turbine added means more homes running on clean energy instead of fossil fuels.

The project also pushes sustainability beyond just generating clean power. Thirty-six towers use low-carbon steel, and 120 of the rotor blades are fully recyclable. The industry is even finding ways to repurpose old blades from retired wind farms, turning them into transmission poles instead of landfill waste.

The clock is ticking though. The North Sea gets rougher as autumn turns to winter, and lifting 400-foot rotors in high winds isn't an option. The team expects to have all remaining turbines installed by year's end, with full commercial operation starting in 2027.

Right now, 36 turbines are spinning in the North Sea, and Brave Tern is loaded for its next run.