There are some advantages of VERTICAL AXIS WIND TURBINES:

Vertical Axis Wind Turbines, more commonly referred to as VAWTs, have the generator and gearbox assembled near the ground instead of these parts being supported by a tower. This proves to be advantageous especially considering maintenance purposes. Part of the disadvantage of using a wind turbine is the difficulty of setting up a tower to put it up. With these turbines, there is no need for tower structures. They also have parts which are easier to maintain. Because they have a high airfoil pitch angle, they also have increased aerodynamic systems and decreased drag during low and high pressure systems. They are less likely to break down and collapse during high winds. There are areas where horizontal axis wind turbines may be prohibited. In these areas, Vertical Axis Wind Turbines may be the alternatives. They also take advantage of areas like hilltops and ridge lines which funnel the wind for a higher wind velocity.

I am glad that Vertical Axis Wind Turbines are staging a comeback which are of larger size than the past ones.

Dr.A.Jagadeesh Nellore (AP), India
Wind Energy Expert