The Nabb Battery Energy Storage System, located in Bethlehem, Indiana, operates under the jurisdiction of the ReliabilityFirst Corporation within the Midcontinent Independent System Operator power control area. This facility utilizes advanced battery technology to deliver an operating capacity of 5 MW. The plant is regulated and is primarily owned by Duke Energy Indiana, a subsidiary of Duke Energy Corporation, which also serves as the plant operator. In addition to Duke Energy Indiana, other owners of the power plant include Duke Energy Indiana.