Battery Swapping for Buses: SUN Mobility Unveils Modular Solution on Tata Starbus EV

SUN Mobility has introduced a modular multi-battery swapping solution for electric buses, showcased on the Tata Starbus EV platform at the Prawaas 5.0 event. The system is designed to accelerate commercial vehicle electrification by offering a rapid alternative to conventional plug-in charging, capable of swapping battery modules in under five minutes. This development aims to reduce vehicle downtime and lower initial acquisition costs for fleet operators through a flexible energy infrastructure model.

Inaugurated by Amrendra Kishore Singh of the Ministry of Heavy Industries, the new AIS-038-certified solution allows for the simultaneous exchange of two battery modules. The modular architecture is highly versatile, supporting both 50 kWh and 100 kWh configurations for commercial vehicles ranging from 3-tonne to 55-tonne gross vehicle weight. This OEM-agnostic platform, developed using over 275 in-house patents, is intended for diverse applications including urban transit, staff transportation, and intercity bus operations.

The solution is offered through a Battery-as-a-Service (BaaS) model, which separates the cost of the battery from the vehicle purchase to address concerns regarding technology obsolescence and high upfront expenses. Each vehicle is integrated into a digital ecosystem that utilizes a Digital Twin platform to monitor battery health, energy consumption, and driver behavior in real-time. This system also supports over-the-air software updates and predictive maintenance to ensure operational reliability across large-scale fleets.

SUN Mobility currently operates a network of more than 1,900 Swap Points across 23 cities, having already facilitated over 70 million swaps and 2.1 billion electric kilometers. Co-Founder Chetan Maini emphasized that the modular system is a milestone in making electric mobility as economically viable as conventional transport by reimagining energy infrastructure. CEO Ashok Agarwal added that the platform's ability to serve various fleet types without compromising affordability is a critical step toward the mass adoption of electric vehicles in the commercial sector.