Meet "Thor": Denmark's upcoming wind giant in the sea with 72 turbines to power a million homes

The world’s largest economies are racing to run their grids without burning fossil fuels. And while the US is still trying to find its feet, Denmark just made a move worth watching.

It’s called Thor, a giant offshore wind farm currently under construction in the North Sea that will be Denmark’s largest. When fully operational in 2027, Thor will provide green electricity to more than one million Danish households, with a total capacity of over 1 gigawatt. That’s enough to power every home in a state the size of Rhode Island, twice over.

What exactly is Thor?
Thor is a joint venture between German energy giant RWE, which has a 51 percent stake, and Norges Bank Investment Management, which holds the other 49 percent. Together, they are working to build what sounds like science fiction: a massive energy hub right in the middle of one of the roughest stretches of ocean on the planet. The wind farm will be built around 22 kilometers off the west coast of Jutland, Denmark, and installation of turbines at sea will begin in 2026.


The farm will comprise 72 Siemens Gamesa SG 14-236 DD offshore wind turbines. This will be connected to the Danish grid through two new substations, one onshore and one offshore. The power generated by each turbine is collected at the offshore substation, stepped up to the transmission voltage level, and exported via export cables to the onshore point of connection.

To further enhance sustainability, half of the turbines will be fitted with CO2-reduced steel towers, and 40 will feature recyclable rotor blades.

Why this matters to Americans
Here's the part that's a little too close to home. The US has massive offshore wind potential, arguably more than most countries, but it has barely been exploited.

Offshore wind farms could supply as much as 20% of the region’s power needs along the Atlantic coast by 2050, the National Renewable Energy Laboratory (NREL) says. In a core high-growth scenario, offshore wind could make up 133 gigawatts of US power capacity by 2050, which is almost as much as all the land-based wind capacity currently installed in the country.

That is not a distant dream. It is a realistic, modeled pathway if the country actually commits to building it.

The 2024 Offshore Wind Market Report from the American Clean Power Association is a compelling economic argument. The clean power industry is projected to invest $65 billion in offshore wind projects by 2030, creating 56,000 jobs across the United States. There are 56 gigawatts of capacity under development on 37 leases, enough to power the equivalent of 22 million American homes. American Clean Power Association

For millennials and Gen Z workers, those aren’t just policy stats. They are opportunities in engineering, manufacturing, logistics, and clean tech, areas that are growing as traditional energy jobs shrink.

The engineering challenge no one talks about
Building offshore wind at scale is really difficult. The SG 14-236 DD, Siemens Gamesa’s flagship turbine, can produce almost 15 megawatts of power and has a rotor diameter of 236 meters, giving it a swept area of 43,500 square meters and more than 30% more annual energy production than its predecessor. The length of the blade is 115 m. For context, that's longer than a football field in the US.

The saltwater corrosion, the storm-force winds, and the deep ocean currents all work against the maintenance crews. Turbine technicians have to reach the turbines by boat or helicopter, and storms in the North Sea can halt repairs for days on end.

But the fact that Denmark and RWE are doing it profitably, under a near-zero-subsidy framework supported by a 20-year contract-for-difference scheme, signals that the economics genuinely work now.

The plan is already there
Thor is no moonshot experiment. Denmark built the world’s first offshore wind farm in 1991 and has been perfecting the technology, the policy frameworks, and the supply chains for over three decades. Thor is the culmination of all that accumulated knowledge.

The US doesn’t need to reinvent the wheel. It just needs to start spinning it. The Thor project proves that gigawatt-scale offshore wind is not just a pipe dream; it’s already happening in Denmark.