Removable offshore wind turbines with pre-installed mooring system

A floating energy generating device comprising:

• at least two wind turbines mounted on a floating open structure comprising a frame of submerged interconnected hollow tubes being moored to the seabed via a mooring system,
• each wind turbine featuring, in operation mode, a blade and rotor part mounted at the top of a tower and being connected via a cable to a submerged high voltage power export cable for exporting the electricity generated by the at least two windmills,
• the mooring system comprising a turntable extending at least partly above water level and being above water level attached to the open structure via an arm such that the open structure can weathervane around a rotation axis of the mooring system,
• the mooring system supporting on its rotation axis an electrical swivel,
• the stator of which is connected to the submerged high voltage power export cable and the rotor of which is connected to the cables of the wind turbines,
• wherein the floating open structure comprises a central control power electronic unit placed on the floating open structure connected to the cables of the wind turbines and to the rotor of the swivel, and
• wherein the floating open structure is connected to the turntable via a pivoting yoke comprising two interconnected arms extending from spaced-apart connection points on the open structure to the turntable, the arms including an acute angle.