When considering a wind turbine the first and foremost thing to do is establish if there will be enough constant wind where the turbine will be sited irrespective of size. Once this is established then the site itself can be looked at to see the maximum turbine size that can be erected. Access to a site will dictate what can be erected, if at all, as will the type of structures, ie. power lines, in the vicinity of the site. There are many specialist companies available to help with the initial assessment and most specialise in a particular size and type of turbine, be it for a yacht or a wind farm.