Yup, sailboats use them all the time. Expensive & noisy but, over the years, they will pay for themselves.Laurence said:Is there a way to just stick your own windmill on the roof of your house? I wouldn't care about the 20 years to get back the cost, I'm just thinking tree hugger here.
Powering a sailboat is one thing. Producing 20 KWhr/day for a small home load (without A/C) might take up more space than there is roof.