Abstract: A wind turbine comprising a frame on a floating pontoon, wherein the frame is constructed as a lattice rig upright on the pontoon forming a plurality of rectangular or square openings in the rig for receiving respective interchangeable wind turbine generators with associated drive propellers driven by incoming wind, and each wind turbine generator being arranged to travel up the rear of the rig and through the openings towards the front of the rig. The wind power plant is characterized in that each turbine generator comprises one or more pairs of propeller blades forming a propeller set having a blade diameter defining the turbine rotational plane, each propeller set is arranged at a distance from the front side of the rig to be rotated by the incoming wind towards the rig. There is also described a method for mounting turbines with associated propeller sets and openings in the rig, respectively.