Swedish utility Vattenfall has bought an 85%-stake in two offshore wind projects off the coast of Gothenburg from Norwegian wind developer Zephyr for an undisclosed amount.

The early stage Vidar and Poseidon projects at some 25 kilometres from Sweden’s west coast are primarily planned for floating wind turbines, and are expected to have a combined capacity of 2.8GW and an annual production of 10.5 terawatt hours.

“These two projects will add significant volume of cost-effective fossil free electricity in an area with high demand,” said Helene Biström, head of Vattenfall’s wind business area.