NTPC's move also raises questions about the future of the nation's coal fleet. : India’s largest power generator, NTPC Ltd., has long been a major player in coal-fired electricity. It’s right there in the name: Until 2005, it was known by its longform moniker, National Thermal Power Company. But it has lately stepped into the renewables business, as have many other major power and industrial players in India, with a commitment last year to build 32 gigawatts of renewable energy by 2032. This week, it doubled up that commitment, raising its target to 60 gigawatts.