Residential wind turbines can range in cost from $600 to over $7,000. However these are dangerous to install and proper instructional tools should be used.
So far it is free because wind is a renewable energy source but you have to count the turbine and generator and everything that produces the electricity.
In 2009 the costs to install a wind farm in the US were approximately $2,000/kW of nameplate capacity or $2,000,000/MW. Turbine prices in 2010 are dropping. Construction costs are also dropping. The...