Public Service Enterprise Group Incorporated, through its subsidiaries, operates as an energy company primarily in the Northeastern and Mid-Atlantic United States. It operates through two segments, PSE&G and PSEG Power. The PSE&G segment transmits electricity; distributes electricity and gas to residential, commercial, and industrial customers, as well as invests in solar generation projects, and energy efficiency and related programs; and offers appliance services and repairs. As of December 31, 2020, it had electric transmission and distribution system of 25,000 circuit miles and 860,000 poles; 54 switching stations with an installed capacity of 38,353 megavolt-amperes (MVA), and 245 substations with an installed capacity of 8,647 MVA; four electric distribution headquarters and five electric sub-headquarters; and 18,000 miles of gas mains, 12 gas distribution headquarters, two sub-headquarters, and one meter shop, as well as 58 natural gas metering and regulating stations. The Power segment operates nuclear, gas, oil-fired, and renewable generation assets. It has total generating output was approximately 52,900 gigawatts hours; and owns and operates 467 MW direct current of photovoltaic solar generation facilities. Public Service Enterprise Group Incorporated was incorporated in 1985 and is based in Newark, New Jersey.