Electric Transmission Texas (ETT) to Install Largest Utility-Scale Battery in the U.S. | Green Energy News: "ETT has completed a contract with NGK-Locke, Inc. for a state-of-the-art, sodium-sulfur 4-megawatt NAS battery system, which will be installed in Presidio, Texas. ETT is a joint venture between American Electric Power and MidAmerican Energy Holdings Company (MidAmerican).
The NAS battery will be the first in Texas and the largest in the United States and represents part of a $67 million overall commitment by ETT to improve transmission reliability in Presidio and surrounding areas.
The battery, along with construction of the Gonzales substation, is currently scheduled to be completed by first quarter 2010 in time for summer peak usage. Cost of the battery and substation is estimated at approximately $23 million. A 60-mile, 69- kilovolt transmission line from Marfa to Presidio is targeted for completion by 2012 with an estimated cost of approximately $44 million."
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