HYDERABAD: In a significant move, Power Grid Corporation of India Ltd on Thursday reduced rates by half for its electric vehicle charging stations installed along the Metro corridor as a part of its eco-friendly green services. The revised rates stand at Rs 12.60 per kWh, down from Rs 24.60 per kWh. Power Grid in association with Hyderabad Metro Rail Ltd and L&T Metro (Hyderabad) Rail Ltd has installed four electric vehicle charging stations at Miyapur, Hitech City, Punjagutta and Nagole to provide charging facility to individual e-vehicles and e-taxis. Users can make payment through mobile apps, Power Grid said in a statement.