The Airports Authority of India signed a Memorandum of Understanding with an NTPC Ltd. subsidiary to promote usage of electric vehicles and set up solar power plants at its airports. NTPC Vidyut Vyapar Nigam, a subsidiary of NTPC, will be provided adequate land and rooftop space free of cost at identified AAI airports to set up solar power plants. The AAI owns and manages more than 100 airports across India. The airports in Delhi, Mumbai, Bengaluru, Hyderabad, Mangaluru and Lucknow are managed by private companies and not by the AAI. In the initial phase, NVVN will be taking up the projects at airports in Tamil Nadu and Rajasthan. The solar capacity required at airports in Tamil Nadu and Rajasthan is around 55 MW and 8 MW, respectively to become 100 per cent solar powered airports.