A wind turbine's electricity generation varies significantly based on size and wind conditions, but typical modern utility-scale turbines generate between 2 to 3 megawatts (MW), equivalent to 2000-3000 kilowatts, while smaller residential turbines might produce only a few kilowatts.
It is common for wind turbine purchase and installation costs to be recouped within the first 5-15 years of operation. With a life expectancy of 25 years, there is a possibility of at least 10 years of profit, besides repair and maintenance costs.
Wind turbine blades might cease rotating due to several circumstances, such as rapid or sluggish wind speeds and adverse weather conditions. The turbines will cease spinning if they cannot get any energy from the wind or if their blades are damaged by too fast movement.
Modern cabinet installations now feature integrated systems with 5kWh to multi-megawatt capacity at costs below $400/kWh for complete energy storage solutions.
The United States Department of Energy reports that most modern land-based wind turbines have blades of over 170 feet (52 meters), resulting in a total rotor diameter longer than a football field.
In 2012, two wind turbine blade innovations made wind power a higher performing, more cost-effective, and reliable source of electricity: a blade that can twist while it bends and blade airfoils (the cross-sectional shape of wind turbine blades) with a flat or.