This rooftop-mountable wind turbine produces up to 10 kW of energy with no noise, vibration, or other disturbance to the building. It typically offers an ROI of 4-7 years, with an average long-term cost of $0.009 to $0.025 per kWh. New Balanced Wind turbines are made with domestically sourced components, including bronze and steel composites and recycled rubber. The turbine occupies a footprint of 144 square feet and is designed to last for 25 years.