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Electric Transmission Texas Brings Largest Utility-scale Battery
To One of Texas' Oldest Cities
Electric Transmission Texas, LLC (ETT) dedicated the nation’s largest, and Texas’ first, utility-scale battery during ceremonies held April 8 in Presidio, one of the oldest cities in Texas.
The 4-megawatt NAS® sodium-sulfur battery system was energized March 31 to the Electric Reliability Council of Texas grid.
ETT is a joint venture between subsidiaries of American Electric Power (NYSE: AEP) and MidAmerican Energy Holdings Company.
The NAS battery system represents part of an approximately $70 million overall commitment by ETT to improve transmission reliability in Presidio and surrounding areas. The dedication ceremonies recognized installation of the new battery system and thanked local and state leaders for the support that helped achieve approval from the Public Utility Commission of Texas (PUCT).
Full utilization of the battery system, along with the recently completed Gonzales Substation, is expected to begin by this summer in time for summer peak usage. Cost of the battery and substation is approximately $25 million. A 60-mile, 69- kilovolt transmission line from Marfa to Presidio is targeted for completion by 2012 with an estimated cost of $45 million. In March, ETT filed an application with the PUCT requesting a Certificate of Convenience and Necessity authorizing construction of the transmission line outage.
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