SUN Mobility Unveils Modular Multi‑Battery Swapping Solution
On 9 July 2026, at the Prawaas 5.0 exhibition held at the Helipad Exhibition Centre in Gandhinagar, Gujarat, SUN Mobility demonstrated the world’s first modular multi‑battery swappable solution integrated with Tata Motors’ 12‑metre Starbus EV platform. The inauguration was performed by Mr Amrendra Singh Kishore (IOFS), Director, Ministry of Heavy Industries, Government of India, and attended by Anand S, Vice President and Business Head of Tata Motors Commercial Vehicles; TV Srinivas, Head of Product Planning at Tata Motors Commercial Vehicles; Chetan Maini, Co‑founder and Chairman of SUN Mobility; and Ashok Agarwal, CEO of SUN Mobility – HEV Business.
The AIS‑038 certified solution enables simultaneous swapping of two battery packs, completing the operation in under five minutes. It supports both 50 kWh and 100 kWh battery configurations and is compatible with vehicles ranging from 3 tonne to 55 tonne gross vehicle weight, covering bus lengths of 7 m to 13.5 m and trucks up to 55 t GVW. Under SUN Mobility’s Battery‑as‑a‑Service (BaaS) model, the battery is decoupled from the vehicle, allowing operators to pay only for the energy consumed, thereby removing upfront battery‑ownership costs and aligning financing with internal‑combustion‑engine vehicles.
Each swappable EV operates as a connected node on SUN Mobility’s intelligent network, transmitting battery health, location, driver behaviour, energy usage and predictive‑maintenance alerts. The system incorporates over‑the‑air (OTA) updates and is underpinned by a proprietary Digital Twin platform that creates a live virtual replica of every battery pack and swap event, enabling predictive degradation modelling, remote fault diagnosis, optimized swap scheduling and carbon accounting at the vehicle level.
The technology is built on more than 275 patents developed entirely in‑house and is positioned as an OEM‑agnostic infrastructure to accelerate electrification of India’s commercial bus market, estimated at USD 12 billion according to a CEEW 2025 study. The solution aligns with policy drivers such as the FAME II scheme, the PM E‑Drive programme and state‑level procurement targets that are collectively accelerating adoption of electric buses.
Chetan Maini stated that the modular multi‑battery swapping solution “has the potential to unlock large‑scale electrification across the commercial vehicle ecosystem by delivering a cost‑effective and operationally efficient energy solution for diverse applications.” Ashok Agarwal added that the platform “serves staff, city‑transit and intercity fleets alike, without compromising affordability or operational reliability, representing a real step towards mass adoption of EVs in commercial transportation.”
SUN Mobility, founded in 2017 by Chetan Maini and Uday Khemka, is backed by investors including Bosch, Vitol, Helios Climate and Indian Oil Corporation Limited (IOCL). To accelerate nationwide rollout, the company has created a 50:50 joint venture with IOCL, IndoFast Swap Energy, aimed at scaling India’s battery‑swapping network. To date, SUN Mobility has deployed more than 1,900 Swap Points across over 23 cities, facilitating over 70 million battery swaps and enabling more than 465 million electric kilometres, which have helped avoid the emission of over 100,000 metric tonnes of CO₂.
The demonstration underscores SUN Mobility’s ambition to build indigenous, OEM‑agnostic energy infrastructure that can be exported globally, positioning India as a leader in next‑generation electric mobility solutions.