Germany and Denmark have signed an agreement to connect at least 3 gigawatts (GW) of wind energy generation capacity on the Danish island of Bornholm to the mainland by the beginning of the 2030s, the German economy ministry said on June 1.

"The project creates the basis for future green electricity imports to Germany and makes our electricity supply cheaper, safer and more independent of fossil fuels," German economy minister Robert Habeck said in a statement.

Under the agreement, 2 GW will be transmitted to Germany and 1.2 GW go to mainland Denmark, the statement said.

The transmission system operators (TSOs) 50Hertz and Energinet - of Germany and Denmark respectively - have agreed in to each bear half of the infrastructure costs of the project.

Last month, leaders from seven European Union countries, including France, Germany and the Netherlands, alongside non-EU countries Norway and Britain, pledged to speed up their expansion of wind farms, develop "energy islands" - or connected renewable generation sites at sea - and work on carbon capture and renewable hydrogen projects in the region.