Swedish marine energy developer Minesto has completed the initial commissioning sea trials of its subsea kite technology called Deep Green off the coast of Holyhead, North West Wales.

Minesto’s 500kW tidal energy kite (DG500) is the only verified marine power plant designed to produce renewable energy from tidal streams and ocean currents.

“This is a very significant step towards our ultimate goal of proving the complete DG500 system.”

According to the company, results of the sea trials proved that the DG500 marine energy kite is ready to begin ‘flying’ full subsea routes.

During these trials, the company tested a wide range of functionalities of the DG500 device including kite control system, launch and recovery systems.

In addition, connections and communications have been tested and verified in various sea states.

Minesto chief operating officer David Collier said: “This is a very significant step towards our ultimate goal of proving the complete DG500 system.

“I am very proud of the team as this accomplishment has been made possible only by the hard work and endeavour of everyone that has been involved in the design and development of the Deep Green technology over a number of years.

“The commissioning efforts have been performed in a safe and robust manner, which is especially important considering the many innovations involved in this first-of-its-kind project.”

Minesto will now test the power take-off system and electricity generation of the DG500 device.

It also has plans to continue the commissioning programme of the device and will carry out the milestones of flying full subsea trajectories.

The European Regional Development Fund through the Welsh European Funding Office has invested €13m for Deep Green’s commercial rollout.