I live on the coast of Maine, town has a population of 1300 people and there are 5 wind turbines here. I figured there should be enough wind here to make it feasible. Just to be sure, I put up a $500.00 weather station to collect data. After collecting data for over a year, I decided there was not enough wind. So the weather station saved me from spending $17,000 a wind turbine that would never have paid for itself. Having since talked with 4 of the 5 owners... they agreed, they wouldn't do it again. I never talked with the 5th owner. All of them have the Skystream units. It takes 8 mph wind to produce any power at all, but you need to average at least 12-15 mph to have any meaningful amount of power. I think it is over 20 mph to produce the rated output. Then you figure, at least with the Skystream, the warranty is over about the time the payback happens and with all the moving parts... maintenance is needed. Most places need at least a 60 ft tower to get the turbine up in clean air. Otherwise you get less power and the "dirty" air causes more turbulence/vibration in the unit which leads to a shorter life and more maintenance. As others have said... solar has become much more cost effective, little to no maintenance and a quality system has a 25-30 year warranty rather than a 5 year one. When the dust settled, I installed a solar DHW and I am saving for solar PV. Wind here is just not cost effective.