Reliance infra was earlier named as reliance energy and prior to that as Bombay Suburban Electric Supply.
Its parent company is Anil Dhirubhai Ambani Group and is headed by Anil Ambani. It was founded in 2002 and has its headquarter at Mumbai. It is the only distributor of electricity consumed by the residents of outskirts of Mumbai. Currently it is constructing a 5600 MW gas based thermal power plant in Dadri which is in Uttar Pradesh state. Its one of the plant in Sassan is the largest integrated coal cum power plant in the world. Currently it is operating five plants with a capacity of 941 MW.