During the test, the company will evaluate the upgraded generator and enhanced electrical system of the turbine, which features majority of components as those on Siemens SWT-6.0-154.

The turbine is expected to produce 32 million kWh of electricity, and is claimed to generate around 10% more power than its predecessor. It incorporates Siemens’ Direct Drive technology.

Siemens Wind Power and Renewables Division technology head Morten Rasmussen said: "Based on the reliable technology and supply chain of our six megawatt machine we have improved our flagship wind turbine with stronger permanent magnets, optimized generator segments and upgraded converter and transformer units.

"With only these minor changes we expect to get it ready for serial production within only two years."

The company said that the SWT-7.0-154’s design and low weight capabilities will help reduce offshore infrastructure, installation and maintenance costs.