Public Service Enterprise Group Incorporated, through its subsidiaries, operates as an energy company primarily in the northeastern and Mid Atlantic United States. The company operates nuclear, coal, gas, oil-fired, and renewable generation facilities with a generation capacity of approximately 13,146 megawatts. It sells electricity, natural gas, emissions credits, and a series of energy-related products that are used to optimize the operation of the energy grid. The company also transmits electricity; and distributes electricity and gas to residential, commercial, and industrial customers, as well as invests in solar generation projects, and implements energy efficiency and demand response programs. In addition, it offers appliance services and repairs to customers. As of December 31, 2014, it owned and operated 17,792 miles of gas mains; and owned 12 gas distribution headquarters and 2 sub-headquarters, as well as operated 62 natural gas metering and regulating stations. Public Service Enterprise Group Incorporated was founded in 1985 and is headquartered in Newark, New Jersey.