SUN Mobility’s Battery Swapping Business Model

Industry & Competitive Context

India's electric two- and three-wheeler market has grown against a persistent structural constraint: the battery is the single most expensive component of an EV, and long charging times make fixed-battery ownership impractical for commercial fleets that need continuous vehicle uptime. Battery swapping emerged globally as a response to this constraint, with Chinese automaker NIO rolling out battery-swapping technology since 2014 and completing 500,000 battery swaps by June 2020 under a Battery-as-a-Service subscription model that lets drivers have a fresh battery installed in three to five minutes. In Taiwan, Gogoro built an extensive network of more than 12,000 GoStations across 2,600 locations as of December 2024. World Economic ForumMarkets and Markets

In India, the competitive set includes SUN Mobility, founded in 2017, which pioneered the Battery-as-a-Service model in India by decoupling the battery from the vehicle purchase price to reduce total fleet acquisition costs, with its swap stations deployed across 600-plus locations concentrated in Delhi NCR, Bengaluru, Hyderabad, and Pune. Its principal domestic rival, Battery Smart, holds a significant 36 percent market share in the battery-swapping sector as of mid-2025 and has completed over 74.9 million battery swaps while onboarding more than 68,000 electric vehicle drivers, and surpassed 1,000 stations in 2024 across 30 cities, holding nearly 15 percent of operational battery cabinets in the market, after attracting funding from Tiger Global and responsAbility. Other named competitors in industry coverage include Racenergy, Honda Swap E, Yulu, Mooving, Voltup, and EBikeGo, alongside global players Ample and Contemporary Amperex Technology. One trade publication's 2023 assessment placed SUN Mobility and Battery Smart at an equal 50 percent market share each in the e-rickshaw segment, while SUN Mobility held an 80 percent share in the e-loader (commercial cargo) segment. No verified public information is available on a single, audited, industry-wide market-share figure covering all vehicle segments simultaneously; the percentages above are segment-specific and drawn from different points in time, and should not be read as a unified snapshot. Top 10 Battery Swapping Companies In India 2026 – TYCORUN +4

Company Situation Prior to the Indian Oil Joint Venture

SUN Mobility was formed in 2017 when Chetan Maini joined Uday Khemka, Vice-Chairman of the SUN Group, with Ajay Goel later joining the leadership team. The company is headquartered in Bengaluru and structured as a joint venture between the Maini Group and the SUN Group, a diversified global investor in energy, mining, and new energy storage technologies. Maini brought direct sectoral credibility to the venture: he founded the REVA Electric Car Company in 1994, India's first electric car manufacturer, which later became Mahindra Electric Mobility Limited, and he holds over 40 patents in battery and energy management systems. SunmobilityWikipedia

Early capital and technology validation came from strategic rather than purely financial investors. In 2019, Bosch invested $25 million in SUN Mobility and has since remained a technology partner, while Vitol, the Dutch oil trading organization, invested $50 million in 2021. By 2023, the company had begun testing its model outside India: SUN Mobility began international operations that year with Shell as a partner in the Philippines. On the product side, the second-generation Smart Battery, the S2.1, was launched at the Delhi Auto Expo in January 2023, offering higher capacity and enhanced safety features, alongside SwapX, a compact battery-swapping station developed to improve network density, which, comes with three docks, fits within 4.5 to 6 square feet, and requires only a 15A power supply to operate. By this stage of its development, SUN Mobility operated more than 600 swap stations across 19 Indian cities, enabling over one million swaps and 30 million kilometres of travel every month, and, according to one 2023 trade account, had completed 11.6 million cumulative swaps covering 285 million kilometres, with an internally stated ambition, per the same account, to reach one million cumulative vehicles and 10,000 swap stations within three years. The company remained, however, a capital-intensive infrastructure business without the retail distribution density of an established fuel-retailing partner a gap that shaped its next strategic move. SUN Mobility +6

Strategic Objective

The documented strategic objective, as disclosed at the time of its 2024 transaction with Indian Oil Corporation (IOCL), was to convert battery-swapping from a niche fleet-operator service into infrastructure with the reach of conventional fuel retailing. The joint venture was explicitly designed to establish one of the world's largest battery-swapping networks by leveraging IndianOil's network of over 37,000 fuel stations across India, making SUN Mobility's technology as accessible as conventional fuel stations, with the venture expected to scale to over 10,000 battery-swapping stations across 40-plus cities within three years. This objective reflects a classic platform-scaling logic: rather than building retail density station-by-station, SUN Mobility sought to attach its swapping technology to an incumbent's existing physical footprint. Trilegal

Business Model Architecture & Execution

SUN Mobility's core business model rests on a principle borrowed from telecoms and software: separate the infrastructure from the device, and monetise usage rather than ownership. Practically, this is expressed on the company's own site as an approach of separating the battery from the vehicle and offering it on a "pay-as-you-go" model, intended to make EVs financially viable by addressing high upfront costs, range anxiety, and long refuelling time. BijliWaliGaadiSunmobility

A deliberate architectural choice underpins this model: interoperability. Unlike closed-loop swapping systems tied to a single manufacturer, SUN Mobility's Smart Battery works across multiple vehicle makes and models, so a single Swap Point can serve vehicles from different OEMs off the same rack of batteries a design choice that attracted Bosch, whose own business model depends on supplying components across diverse OEM bases, and made the IndianOil partnership commercially viable, since a fuel station serving multiple vehicle brands is only feasible if the energy-delivery system itself is brand-agnostic. BijliWaliGaadi

Execution of this architecture is visible in the company's OEM and fleet partnerships. In January 2024, SUN Mobility agreed to deploy 30,000 Bounce Infinity scooters across Bangalore, Hyderabad, Mumbai, Pune, and Delhi NCR under both Battery-as-a-Service and Mobility-as-a-Service models, with the scooters achieving a range of over 95 kilometres per swap. Earlier, the company partnered with Zomato in March 2023 to power 50,000 electric two-wheelers for food delivery over the following 24 months, and it has separately worked with Revfin, in a March 2024 tie-up, to offer EV financing for fleet and passenger vehicles using the Battery-as-a-Service model. Internationally, SUN Mobility partnered with Pilipinas Shell in February 2023 to bring battery-swapping technology to the Philippines, and, more recently, it entered a strategic collaboration with Odysse Electric to power the Vader SM e-commute bike in international markets including Africa, Latin America, and Southeast Asia under the BaaS model, while the company has been deploying swapping stations across those regions on a pilot basis. Investors Helios Capital and PIDG (the Private Infrastructure Development Group) have separately backed SUN Mobility's development of battery-swapping networks in Africa and Southeast Asia, with the model reducing upfront vehicle costs by an estimated 30 to 50 percent and enabling swaps of around two minutes to minimise fleet earnings downtime. Bounce Infinity Inks Alliance With SUN Mobility +6

The most significant single act of execution is the IndianOil transaction. In June 2024, SUN Mobility entered a 50:50 joint venture with Indian Oil Corporation named Indofast Swap Energy Pvt. Ltd., targeting electric two-wheelers, three-wheelers, and light commercial vehicles under two tonnes, headquartered in Bengaluru with a corporate office in Gurugram. The transaction had two distinct financial components. IndianOil's board approved formation of the joint venture with an equity investment of Rs 1,800 crore through financial year 2026-27, alongside a separate investment of USD 78.31 million into IOCL Singapore Pte Ltd for the acquisition of preference shares and warrants in SUN Mobility Pte Ltd, Singapore, subject to statutory and regulatory approvals. Anant Badjatya was named CEO of the SUN Mobility–IOCL joint venture in October 2024.(Separately, Wikipedia records Anant Badjatya as CEO of SUN Mobility's India business since March 2022; the two roles are documented in different sources and this case does not assume they are identical without further confirmation.) SUN Mobility has more recently extended its architecture beyond two- and three-wheelers: the company began rolling out a modular multi-battery swapping platform for commercial vehicles ranging from 3 tonnes to 55 tonnes, also operating on a Battery-as-a-Service model that allows fleet operators to buy vehicles without batteries and pay separately for energy usage, with co-founder and chairman Chetan Maini stating that the company believes this modular 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. SUN Mobility +5

No verified public information is available on the specific revenue-sharing terms between SUN Mobility and its OEM or fleet partners, on the pricing structure of individual swap transactions, or on the company's unit economics.

Positioning & Consumer Insight

SUN Mobility's public positioning centres on removing the three most commonly cited barriers to EV adoption in cost-sensitive commercial-mobility segments. The company frames swappable batteries as addressing high upfront costs, range anxiety, and long refuelling time an insight aimed less at private car buyers than at commercial operators (auto-rickshaw drivers, last-mile delivery fleets, and small-and-medium business owners) for whom vehicle downtime is a direct earnings loss. This is reflected in the design of SwapX, which was built to let small and medium businesses such as pharmacy stores and department stores host a swap point at their location under a franchise-style revenue model, in order to expand network density and encourage mass-scale EV adoption. The insight is therefore an infrastructure-economics one rather than a brand or lifestyle one: swapping monetises energy as a utility rather than selling a battery as a durable good, which converts a large fixed capital outlay into a variable, usage-linked operating cost for the fleet operator. SunmobilityBusiness India

Channel & Partnership Strategy

SUN Mobility's channel strategy has three distinct layers, each documented independently. The first is OEM integration embedding swappable batteries directly into vehicles from manufacturers such as Bounce Infinity and, per Wikipedia's account of its fleet partnerships, Amazon among named fleet operators. The second is retail-network leverage through the IndianOil joint venture, which repurposes IOCL's existing fuel-station footprint rather than building new real estate from scratch. The third is international market entry through incumbent energy majors Shell in the Philippines and through development-finance investors such as PIDG and Helios Capital funding swap-network build-out in Africa and Southeast Asia. No verified public information is available on SUN Mobility's advertising expenditure, media mix, or consumer-facing marketing campaigns; its growth to date has been documented almost entirely through B2B and B2G (business-to-government) partnership announcements rather than consumer advertising.

Business & Brand Outcomes

Documented scale metrics, drawn from separate disclosures at different points in time, show consistent network growth. As of mid-2024, SUN Mobility supported more than 25,000 electric vehicles across 20 Indian cities, using over 630 stations and 50,000-plus smart batteries clocking over one million swaps per month. A separate account from around the same period cited 1.7 million battery swaps monthly across 630 stations as of August 2024. On the funding side, SUN Mobility has raised a total of $135 million across four rounds from 29 investors, according to Tracxn, with its most recent funding round a Series B round in July 2025. Separately, PitchBook lists Helios Investment Partners, PIDG, Indian Oil Corporation, Vitol, and Bosch among nine total investors, with $128 million raised. The discrepancy between these two third-party data aggregators is itself worth noting for a reader relying on secondary sources no single, audited, company-disclosed cumulative funding figure was identified in this research. Deal: SUN Mobility's strategic collaboration with IndianOil - Trilegal +3

No verified public information is available on SUN Mobility's revenue, profitability, EBITDA, or customer-acquisition and retention metrics, as the company has not publicly disclosed these figures. No verified public information is available on the current, post-2024 total station count or vehicle count on a company-audited basis; the 600-plus station and 20-to-25,000-vehicle figures cited above are the most recent independently reported figures identified.

Strategic Implications

SUN Mobility's trajectory illustrates a distinctive path for infrastructure-heavy mobility ventures in emerging markets: rather than competing purely on network density against a well-funded domestic rival (Battery Smart), the company chose to attach itself to strategic capital and existing physical infrastructure Bosch for component credibility, Vitol and PIDG for energy-sector capital, and IndianOil for retail real estate at a scale no venture-funded competitor could replicate independently. The open, multi-OEM architecture was a precondition for this strategy: a closed system, usable by only one vehicle manufacturer, would have made a public-sector fuel major's partnership commercially unworkable, since IndianOil's stations must serve vehicles from many brands to justify the space. This suggests that in infrastructure businesses where a single "rail" must be shared across competing device makers, interoperability is not merely a technical preference but the strategic precondition for reaching an incumbent-scale distribution partner.

At the same time, the case highlights the limits of what can be assessed from public information. SUN Mobility has documented network scale, funding events, and partnership announcements in detail, but has disclosed almost nothing about unit economics, profitability, or the actual usage economics facing an individual driver or fleet operator. For a business model whose entire value proposition rests on a cost comparison (swapping versus fixed-battery ownership, per-swap cost versus per-charge cost), the absence of public unit-economics data is a significant gap for any external analyst attempting to judge the model's long-run viability against a competitor, Battery Smart, that has independently reported a higher single-company market-share figure and swap volume in at least one recent trade disclosure.

Discussion Questions

SUN Mobility pursued strategic investors (Bosch, Vitol, IndianOil) rather than relying solely on venture capital rounds. What are the trade-offs of building an infrastructure platform primarily on strategic corporate capital rather than financial-investor capital, particularly regarding governance, exclusivity, and long-term flexibility?

The case notes that an open, interoperable battery architecture was a precondition for the IndianOil partnership. Under what other market conditions might a closed, single-OEM battery-swapping model (as historically used by NIO) be strategically superior to an open architecture, and why?

SUN Mobility and Battery Smart appear to hold different, segment-specific leadership positions (e-loaders versus overall network share) at different points in time, based on separate third-party sources. What does this fragmentation of "market share" claims suggest about the maturity of competitive benchmarking in the Indian EV-infrastructure sector, and how should a strategist treat such figures?

The IndianOil joint venture structure combined a direct equity investment in the JV with a separate instrument (preference shares and warrants) in SUN Mobility's Singapore parent entity. What strategic and governance purposes might this dual structure serve for a public-sector oil major partnering with a venture-backed private company?

Given the public disclosure gaps around unit economics, revenue, and profitability identified in this case, what specific metrics would you require from SUN Mobility before recommending it as an investment or a strategic partner, and how would you attempt to estimate them indirectly using only public information?