Floating wind power for and with Southern Brittany
Supplying green electricity to 450,000 residents
Located at least 19 km from the coastline
270 MW of power generated by the wind farm
Pennavel will be France’s first commercial-scale floating offshore wind farm (250 MW) when it becomes operational. It will be located off the coasts of Groix and Belle-Île-en-Mer.
Committed to an energy transition that respects local communities and citizens, we place dialogue at the heart of our approach, with the ambition of helping to build a sustainable industrial ecosystem that respects social and environmental issues.
The site was designated by the French government in 2020 and following a consultation process involving all relevant stakeholders and maritime users.
Pennavel must go through several major steps before moving on to construction, offshore installation, and ultimately long-term operation of the wind farm.
Throughout the entire process, a continuous consultation framework with citizens, elected officials, and regional stakeholders will be maintained.
Discover how electricity generated by floating offshore wind turbines travels from sea to shore — step by step.
Each turbine is equipped with three large blades that begin rotating when wind speeds reach 15 km/h.
Also known as the float, this buoyant platform supports the wind turbine and allows it to remain stable on the surface of the sea.
Anchor lines hold the floating foundation and its wind turbine, preventing them from drifting.
Dynamic submarine cables connect the wind turbines to one another and to the offshore substation. These cables are specially designed to endure wave motion, sea currents, and the vertical and horizontal movement of floating structures.
The electrical substation collects the electricity generated by the wind turbines and steps up the voltage (from 66kV to 225kV), making it suitable for export to shore.
The high-voltage export cable carries electricity from the offshore substation to the mainland. It first travels underwater, then continues underground to reach the onshore substation.
Once on land, the electricity enters the onshore substation, where it is distributed into the national power grid.