How much energy does an average person use in the US? I have a hard time understanding their feasibility on a household scale. They do look good though.
It really depends on how hard the wind blows. My family of four in a pretty typical house use between 550 and 700 KWH in a month. So, if the wind blows half the time, the 2kw twin rotor model above would be enough to offset our use.
It starts at 8mph wind speed and peaks at 30mph. I think I would need to get the low wind speed model, which has 10 foot diameter rotors, instead of 7 foot; and it costs $300 more. Very interesting stuff.
