By David Sneed -- Jim Efird paused next to a row of huge, gleaming wine vats at the Tolosa Winery just south of San Luis Obispo. Electrical refrigeration units hum in the background.“This is so cool,” said Efird, one of the winery’s principal owners. “Can you believe that solar panels power all of this?”Those solar panels — all 2,508 of them — sit a few yards away on a 3-acre installation next to the winery. On this crisp, clear autumn afternoon, the panels crank out 137 kilowatts of power, equivalent to about 200 horsepower.

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