Assessing the Value of Small Wind Turbines

With the California blackouts of 2001 still a painful memory, Chris Beaudoin wants to generate some of his own electricity. He marveled the other day at how close he is to that goal, gazing at two new wind turbines atop his garage roof. They will soon be hooked to the power grid.

“I don’t care about how much it costs,” said Mr. Beaudoin, a flight attendant with United Airlines. That would be $5,000 a turbine, an expense Mr. Beaudoin is unlikely to recoup in electricity savings anytime soon.

No matter. After shoring up the roof and installing the two 300-pound, steel-poled turbines in January, Mr. Beaudoin found himself at the leading edge of a trend in renewable energy.

Fascination with wind turbines small enough to mount on a roof is spreading from coast to coast. Mayor Michael R. Bloomberg of New York last month proposed dotting the city with them. Small turbines have already appeared at the Brooklyn Navy Yard, atop an office building at Logan International Airport in Boston, and even on a utility pole in the small New Hampshire town of Hampton.

These tiny turbines generate so little electricity that some energy experts are not sure the economics will ever make sense.

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