Each blade of the SWT-6.0 turbine measures 75m in length and is expected to produce 25 million KWh of clean electricity in offshore locations.

The company’s gearless drive technology was employed in the development of the SWT-6.0 turbines, providing a compact design and weighing 200t.

Siemens Energy wind power division CTO Henrik Stiesdal remarked that the company had invested three decades of technical expertise into the development of the turbines.

"The start of field testing of the 154m rotor for the 6-MW is an exciting step in the development of competitive technologies for the large offshore wind farms of the future," added Stiesdal.

Siemens is also partnering with Danish group, DONG Energy to install 300 such offshore wind turbines for projects off the coast of the UK.