NRG Energy, Inc., together with its subsidiaries, operates as an integrated wholesale power generation and retail electricity company. The company engages in the ownership, development, construction, expansion, modification, refurbishment, and operation of power generation facilities. It is also involved in the trading of energy, capacity, and related products; transacting in and trading of fuel and transportation services; and the supply of energy, services, and products to retail customers. In addition, the company engages in the investment, deployment, and commercialization of potentially disruptive technologies focused on the areas of distributed solar, solar thermal, and solar photovoltaic; and low or no greenhouse gases emitting energy generating sources, such as the fueling infrastructure for electric vehicle ecosystems. As of December 31, 2012, it operated 89 fossil fuel plants, 4 utility scale solar facilities, 4 wind farms, and distributed solar facilities with 45,105 megawatts (MW) of fossil fuel and nuclear generation capacity; and 1,270 MW of renewable generation capacity. Further, the company engages in the district energy business with steam and chilled water capacity of approximately 1,098 megawatts thermal equivalent. NRG Energy, Inc. was founded in 1989 and is headquartered in Princeton, New Jersey.