Energyunited

The Crescent battery was obtained for a peak shaving application and represents the first application of battery energy storage for electric utility applications on the US Electric grid. The battery was originally installed in 1983 at the Battery Energy Test Facility (BEST) that was built in the Public Service Electric and Gas (PSE&G) NJ service area as a joint venture of EPRI and the US Department of Energy (with PSE&G as the host utility), to establish a laboratory for testing large stationary batteries for electric utility applications. After completing an initial test phase, during which this battery was used for a few hundred charge-discharge cycles, it was purchased by the North Caronlina Electric Membership Cooperative (EMC) and moved to the Crescent EMC location in Statesville, NC, in 1987.

As of 1995, the battery had performed its intended function and saved Crescent EMC over $223,000. Capacity tests performed around 1999 confirmed that the cells still retained their original capacity of over 2000 Ah. It is also pertinent to note that the battery was installed in a modest, metal, prefabricated building, was cooled only with ambient air ventilation, and required minimal routine maintenance during its operational life.

In May 2002, after a significant battery overcharge and likely damage, EnergyUnited performed an analysis of the system and made a business decision to decommission the BESS.


Lead-acid Battery


500

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