Norway's 5-Year Floating Wind Test Hits 98% Uptime

After nearly five years generating power in the rough North Sea, a floating wind turbine has proven that renewable energy can thrive in some of Earth's toughest conditions.

The TetraSpar Demonstrator wrapped up its mission off the coast of Karmøy, Norway, this month with numbers that exceeded expectations. The 3.6 megawatt turbine achieved 98% availability and generated 70 million kilowatt hours of electricity, enough to power thousands of homes while floating in 200 meters of water.

Unlike land-based turbines that need deep foundations, this floating platform was assembled at the dock without any welding, then simply towed out to sea. That modular approach could make offshore wind farms faster and cheaper to build anywhere in the world.

The turbine faced everything the North Sea could throw at it: winter storms, salt spray, and constant wave action. Engineers monitored every movement and stress point, creating one of the most detailed datasets ever collected on floating wind technology.

Now safely towed to shore near Bergen, the platform will undergo detailed inspection. Scientists will compare the physical wear and tear against their computer models, checking for corrosion, material fatigue, and structural performance after 40,000 hours of operation.

The Ripple Effect

The lessons from this test are already powering progress. Stiesdal Offshore used the data to design TetraSub, a next-generation floating foundation built for turbines three times more powerful.

Scotland's Pentland Floating Offshore Wind Farm has already chosen TetraSub for its 92.5 megawatt project. The modular assembly techniques proven off Norway mean these massive structures can be built faster and deployed in deeper waters where wind blows strongest.

With TetraSpar clearing out, the test site now has room for the next wave of floating wind concepts. The grid connection and seabed space are ready for innovators testing even newer designs that could unlock offshore wind potential worldwide.

Co-owners RWE and TEPCO Renewable Power are applying the findings to commercial projects across Europe and Asia. Every data point collected helps engineers build floating turbines that last longer, cost less, and generate more clean energy.

This successful five-year test proves that floating wind isn't experimental anymore—it's ready to help power the world.