Largest US coop utility installs first battery energy storage system


Pedernales Electric Cooperative (PEC) has installed its first battery energy storage in Johnson City, Texas.

The 2.25MW/4.5MWh battery system was supplied by mobile and modular solutions provider Aggreko.

The system is connected to the grid via Aggreko’s proprietary power electronic converters and it is managed by the company’s intelligent software and controls system to provide market-based regulation services to Texas grid operator ERCOT.

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PEC, the largest electric cooperative in the US and headquartered in Johnson City, will assess the results of this installation to determine the potential for additional battery installations.

“Aggreko’s technology will assist PEC in the management of the statewide grid, while providing our customers with a more reliable and affordable source of energy,” said PEC CEO Julie C. Parsley.

Sriram Sarma Emani, vice president of operations at Aggreko Microgrid and Storage Solutions, adds: “This represents one of a wide range of renewable energy-related solutions that Aggreko offers, from hybrid microgrids to solar-plus-storage packages to large-scale grid emulation services for solar and wind farm commissioning. Having completed a number of storage, microgrid and renewables projects in the ERCOT market, we are proud to add this system to our portfolio of energy services within the U.S.”

This energy storage system is the first for Aggreko with an electric cooperative in the dynamic Texas energy storage market, but it is Aggreko’s sixth battery project in the state of Texas. Those systems include the 36MW Notrees project, North America’s largest wind-integrated battery plant.

The company also offers a wide range of mobile and modular systems, including battery plants, for temporary power or energy services on an as-a-service basis.