Delhi has added 400 new electric buses to its transport fleet, making it the city with the largest number of e-buses in India. The buses were supplied by Tata Motors and bring Delhi's total electric bus fleet to 800.

from Times of India https://timesofindia.indiatimes.com/auto/news/delhi-powers-up-ahead-of-g20-becomes-largest-fleet-of-e-buses-in-bharat/articleshow/103469630.cms