Method and System for Servicing a Horizontal-Axis Wind Power Unit

A method for in-situ servicing of a generator of a horizontal-axis wind power unit, comprising:

• lifting a service device to a wind-turbine hub of the horizontal-axis wind power unit;
• mounting the service device to the wind-turbine hub;
• rotating the wind-turbine hub to move the service device to a rotational service position;
• immobilizing the wind-turbine hub so that the service device is fixed in the rotational service position;
• and
• servicing the generator using the service device.

A wind power unit having a wind turbine hub and being configured for use with a service device that mounts to the wind turbine hub, the wind power unit comprising:

• a service device mount on the wind turbine hub;
• a lifting system for lifting service device to said service device mount;
• and
• a system controller responsive to commands from a remote control unit so as to control rotation of the wind turbine to:
• position said service device mount at a service device lifting position;
• and
• once the service device is secured to the service device mount, position the service device at one or more service positions different from the service device lifting position.