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Typical cost range for a single wind turbine blade spans from roughly $80,000 to $350,000, depending on blade length, composite materials, and engineering requirements.
On average, therefore, wind turbines do not generate near their capacity. Industry estimates project an annual output of 30-40%, but real-world experience shows that annual outputs of 15-30% of capacity are more typical. With a 25% capacity factor, a 2-MW turbine would produce in.
High-speed winds, typically above 25-30 mph (40-48 km/h), can cause a turbine to reach its maximum power production capacity quickly. At this point, any further increase in wind speed won't lead to more energy generation due to aerodynamic limitations.
According to The United States Department of Energy, most modern land-based wind turbines have blades of over 170 feet (52 meters). This means that their total rotor diameter is longer than a football field.