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'Small wind' power plants are blowing strong

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The installed capacity of "on grid" small-wind residential generators has almost tripled, from 1,300 kilowatts nationwide in 2006 to 3,000 kilowatts last year, says the American Wind En­­­ergy Association (AWEA), a Washington-based trade organization. The number of residential installations rose from 400 to 1,200 units in the same period.

Supplying that tiny but red-hot market are dozens of new companies that have popped up since 2000. Though a half-dozen companies dominate the market, AWEA tracks about 45 US manufacturers. With demand strong overseas, too, the US is the world leader in small-wind power, exporting more than half of what it sells.

"The growth we're now seeing in small-wind residential in the US is impressive," says Ron Stimmel, who tracks the small-wind market for AWEA. "Advanced technology and electronics have made these units more reliable, and more states are now offering incentives to build them."

At least 26 states have tax or productivity incentives or other subsidies to support wind energy, Ms. Forsyth says. But strong growth is happening even without the federal tax incentives enjoyed by solar panels and big utility-scale wind turbines, she notes.

Countervailing breezes are blowing.

Long held down by high up-front costs, lack of federal subsidies, and neighborhood opposition on aesthetic and noise grounds, small residential wind-power use continues to grow far more slowly than solar photovoltaic "panels," experts say. Some also oppose small-wind units claiming they are "bird Cuisinarts," Loebelenz says, though he has never found dead birds by his unit.

Another major hurdle is zoning laws. While few states or the 25,000 local zoning authorities have laws specific to wind power, that's changing, Mr. Stimmel says. Five states – Wisconsin, California, Michigan, Vermont, and New York – now prohibit local zoning laws from blanket small-wind prohibitions.

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