The Honeywell Wind Turbine by WindTronics is a wind power plant intended for home use. Its 6-foot-diameter blades start making power at wind speeds as low as 2 mph and can handle wind speeds up to 42 mph. According to the manufacturer, this turbine has the lowest installed price per kilowatt-hour of any unit in its class. The $6,500 price covers both the turbine and the control box that connects to the home’s panel. WindTronics, 866/632-7840, windtronics.com.