The project will evaluate the performance of these fuel cell electric buses in the Delhi NCR region's challenging climate, focussing on how local fuel and air quality affect the buses' efficiency, longevity, and operational reliability in transit bus fleets.

The hydrogen fuel cell bus was developed following a successful tender won from Indian Oil in June 2021.

Chairman, Indian Oil, said: "The collaboration with an Indian biofuel major – Praj, ... will strengthen our resolve to achieve our goal of net-zero operational emissions by 2046 and maintain our leadership in the green energy domain.”