Small wind turbines (SWTs) less than 50 kW are playing a growing role in electricity generation, and are now being deployed in domestic, commercial and agricultural scenarios. The World Wind Energy Association (WWEA) predicts that the global SWT market will increase from 95 MW in 2011 to 700 MW in 2020, growth of approximately 25 percent per year. But market share has remained small when compared to domestic-scale photovoltaics (PV).