SOLAR ENERGY CO. SUNEDISON BUYING WIND POWER CO.

The Associated Press

Solar energy company SunEdison is adding some wind-fueled power to its business with a deal worth up to $2.4 billion.

The St. Peters, Missouri-based company and its publicly traded subsidiary, TerraForm Power Inc., say they are buying First Wind for $1.9 billion now and $510 million in payments if First Wind completes certain projects.

First Wind is a Boston-based independent energy company operating or building projects in the Northeast, West and Hawaii.

The deal is expected to close in the first quarter.

SunEdison Inc. develops and operates solar power plants. Its shares are up 8 percent to $17.95 in after-hours trading. TerraForm’s shares gained 1.2 percent to $26.15.

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