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AES Corp. and subsidiary AES Energy Storage say the Laurel Mountain renewable energy facility has surpassed the 400,000 MWh mark of regulation service to the PJM Interconnection grid.

Laurel Mountain, which features 98 MW of wind generation and 64 MW of integrated battery-based energy storage, has been operational since October 2011. The storage component of the project is the largest of its kind, AES says, and provides "critical grid stability services to help maintain the reliability of the power grid."

"PJM considers energy storage vital to the reliable operation of the electric system of the future," says PJM President and CEO Terry Boston. "As with any resource that participates in our electricity market, the AES Laurel Mountain storage facility is proving its worth under real-world conditions."

The storage facility's ability to regulate up and down, by charging and discharging stored energy, enables an operating range of 64 MW of flexible capacity with no minimum generating level, AES explains.

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