How Exponent Energy Is Building a Business Around 15-Minute EV Charging

Exponent Energy is trying to solve one of the biggest problems in commercial electric vehicles: charging takes time, and for a vehicle that earns money only when it is moving, every hour spent waiting can reduce the driver's income.

The Bengaluru-based company has built its business around a battery and charging system that can fully charge compatible commercial EVs in about 15 minutes. Instead of manufacturing complete vehicles, Exponent works with automobile companies that integrate its battery technology into their EVs.

The company then supports those vehicles with its own rapid-charging network.

This creates a business with two connected revenue opportunities. Exponent can earn when its battery system goes into a new vehicle, and it can continue earning when that vehicle returns to an Exponent charger over the following years.

That combination makes Exponent more than a battery supplier. It is building an energy infrastructure business around how commercial EVs are charged and operated.

Exponent sells the battery system through vehicle manufacturers

Exponent's first revenue opportunity begins when a compatible electric vehicle is sold.

The company has developed an EV battery called the e^pack, which is integrated into vehicles made by partner manufacturers rather than sold as a complete vehicle directly to customers.

Exponent has worked with commercial EV manufacturers including Omega Seiki Mobility and Montra Electric, while earlier partnerships have also included Altigreen.

This allows Exponent to concentrate on the part of the vehicle where it believes it has the strongest technology advantage: the battery, battery-management system, thermal management and charging software.

The company does not have to build its own chassis, cabin, suspension, dealer network and vehicle manufacturing operation.

Instead, an automobile manufacturer builds the vehicle while Exponent provides the energy system that enables rapid charging.

This makes partnerships with OEMs central to the model. Every vehicle manufacturer that adopts Exponent's system can put more compatible vehicles on the road without Exponent having to become a full-scale automotive company itself.

The real differentiation sits around the battery cells

Exponent's technology is not based on an exotic new battery chemistry.

The company has used lithium-ion cells, including LFP chemistry, and built its differentiation around how those cells are managed during charging.

Its battery-management software, charging algorithms and thermal-management system work together with the charger to control temperature and charging conditions.

That system allows Exponent to offer a 15-minute full charge while also providing a warranty of around 3,000 charging cycles on its battery packs.

This is important because extremely fast charging normally creates concerns around heat and battery degradation.

If a battery charges quickly but deteriorates much faster, commercial operators may save time at the charging station only to face higher battery-replacement costs later.

Exponent's proposition therefore depends on delivering both charging speed and acceptable battery life.

If it can maintain that balance, the technology can become economically useful rather than simply impressive on paper.

Charging creates recurring revenue after the vehicle is sold

Selling a battery system gives Exponent revenue once. The charging network creates the possibility of earning from the same vehicle repeatedly.

Exponent calls its rapid-charging stations e^pumps.

Commercial drivers using Exponent-powered vehicles can return to these stations to recharge, allowing the company to generate recurring revenue from energy sold through the network.

This changes the economics of the business.

A traditional component supplier may earn when an OEM buys the component and then have limited financial participation in how the vehicle is used afterward. Exponent can remain connected to the vehicle throughout its operating life because the vehicle continues to depend on charging infrastructure.

A commercial vehicle can recharge several times every week, which means the charging relationship may continue for years.

The more kilometres the vehicle travels, the more energy it consumes, and the greater the potential charging revenue available to Exponent.

Fifteen-minute charging matters more for commercial vehicles

Exponent has focused primarily on commercial EVs because rapid charging creates much greater economic value for these vehicles than it does for many private cars.

A privately owned car may spend most of the day parked. Charging it for several hours overnight may not create a major inconvenience for the owner.

A commercial vehicle operates differently.

A delivery van, cargo three-wheeler or fleet vehicle generates revenue by remaining on the road. If the vehicle spends several hours charging during the working day, the driver or fleet operator loses productive time.

Reducing that charging stop to about 15 minutes can allow the same vehicle to cover more kilometres, complete more deliveries or operate across multiple shifts.

Exponent says vehicles using its system can operate for more than 150 kilometres a day, while some commercial vehicles can travel more than 200 kilometres depending on usage.

The company is therefore not simply selling faster charging. For commercial operators, it is effectively selling additional vehicle uptime.

That gives customers a financial reason to care about charging speed.

Faster charging can also improve charger economics

Rapid charging is important for Exponent for another reason: it can increase how much revenue each charging station generates.

Charging stations carry substantial fixed costs. The hardware has to be manufactured and installed, the location may involve rental or other expenses, and the network requires maintenance and operational support.

If a charger serves only a few vehicles each day, those costs are spread across relatively little electricity sold.

A faster charger can serve many more vehicles in the same period.

Exponent has said that some conventional public chargers may see only three or four charging sessions a day, while its stronger charging locations can serve 25 to 30 vehicles per day. The company has also reported a peak of 69 vehicles using one charger in a day.

Higher utilisation improves the economics because the same physical charging asset can sell more energy.

This makes the 15-minute system important to both sides of the transaction. Drivers spend less time waiting, while Exponent can process more charging sessions through each station.

Smaller batteries could make commercial EVs cheaper

Fast charging can also change how manufacturers think about battery size.

One way to increase an EV's daily range is to install a larger battery, but batteries are among the most expensive parts of an electric vehicle. A larger battery also adds weight.

Exponent's model offers another possibility.

If drivers can access reliable rapid chargers during the day, the vehicle may not need enough battery capacity to complete every possible journey without stopping.

A smaller battery can reduce the upfront cost of the vehicle, while rapid charging can restore range when needed.

This can be particularly useful in commercial fleets where vehicles often operate within predictable routes and urban areas.

The model works only if charging infrastructure is available where drivers need it. A smaller battery becomes a disadvantage if the nearest compatible charger is too far away or frequently unavailable.

This is why Exponent's battery technology and charging network have to scale together.

Network density is as important as charging speed

A charger that can refill a battery in 15 minutes is not useful if a commercial driver has to travel several kilometres out of the way to find it.

Exponent has therefore focused on building clusters of charging stations in the cities where compatible vehicles operate.

The company has said it aims to keep chargers roughly three to four kilometres apart on important routes so drivers have alternative stations nearby if one location is occupied or unavailable.

Its network has expanded to more than 160 charging stations across four cities, supporting over 2,000 vehicles. The company has also reported more than 315,000 charging sessions and approximately nine million kilometres driven using its ecosystem.

These numbers are important because the network becomes more valuable as density improves.

A larger number of compatible vehicles gives charging stations more customers, while more charging stations make Exponent-powered vehicles easier to operate.

The company therefore has to grow vehicle adoption and charging infrastructure at roughly the same time.

Too many chargers without enough vehicles would create poor utilisation, while thousands of vehicles without enough chargers would damage the customer experience.

Existing vehicle makers help Exponent scale faster

Working with established vehicle manufacturers allows Exponent to avoid one of the most expensive parts of the EV business.

Building an automotive brand requires factories, dealerships, vehicle engineering, after-sales service and significant marketing expenditure.

Exponent does not need to recreate all of that.

Its partners can manufacture and sell the vehicle while Exponent supplies the battery and charging ecosystem.

This allows the same technology platform to potentially operate across several manufacturers and vehicle categories.

If multiple OEMs adopt Exponent's system, the charging network also becomes more valuable because each new vehicle can become another customer for existing e^pumps.

The long-term opportunity is therefore not tied to the success of one vehicle model.

Exponent wants its energy system to sit underneath many different commercial EVs.

Converting existing commercial vehicles expands the market

Exponent has also moved beyond supplying batteries only for newly manufactured electric vehicles.

Through Exponent OTO, the company is targeting the conversion of certain existing CNG and LPG commercial three-wheelers into electric vehicles that can use its battery and rapid-charging network.

This expands the potential customer base because India's commercial vehicle fleet is much larger than annual new-EV sales alone.

A fleet operator may not want to wait several years to replace every existing vehicle with a new electric model.

If suitable vehicles can be converted, Exponent can bring them onto its energy platform earlier.

For Exponent, every converted vehicle can potentially create both hardware revenue and recurring charging demand.

The retrofit model is still newer than the core battery and charging business, but it could help the company increase vehicle density around its charging stations more quickly.

Financing could become another layer of the business

Commercial EV adoption depends heavily on financing.

Drivers and small fleet operators often evaluate vehicles based on their monthly EMI, running costs and expected daily income rather than only on the purchase price.

Exponent has been developing Exponent ONE, a financing and asset-management business connected to its EV ecosystem.

This is strategically relevant because Exponent has access to information that a traditional lender may not have.

Its system can potentially provide data on charging frequency, battery health and vehicle usage. That information can help lenders better understand how the underlying EV asset is performing.

If Exponent can use this data to improve financing access, it can make its vehicles easier for commercial customers to purchase while potentially creating another revenue stream around the ecosystem.

However, financing is still an emerging part of the company, so batteries and charging remain the core business today.

Revenue is growing, but Exponent is still investing heavily

Exponent's financials reflect a company that is still building infrastructure ahead of scale.

Revenue increased from around ₹20.8 crore in FY24 to approximately ₹44.1 crore in FY25, meaning the business more than doubled its top line in one year.

The company nevertheless reported a net loss of roughly ₹64.6 crore in FY25. Those losses have to be viewed in the context of the model.

Exponent is spending on battery research, engineering, charging hardware, station installation, employees and expansion into new markets before every charging location reaches mature utilisation.

A charging network requires substantial upfront investment, while the revenue builds gradually as more compatible vehicles start operating nearby.

This makes the early economics difficult.

The company needs to invest in charging stations before there are enough vehicles to use them, while vehicle buyers need confidence that enough charging stations will exist before they choose an Exponent-powered EV.

Solving this problem requires capital and careful geographic expansion.

The ₹200 crore funding round is about building density

Exponent raised around ₹200 crore in June 2026 from investors including 360 ONE Asset, TDK Ventures, Hitachi Ventures, Eight Roads Ventures, Lightspeed and 3one4 Capital.

The company plans to use the capital to expand its rapid-charging network, enter more cities and support additional commercial vehicle categories.

That expansion is directly connected to how the business makes money.

Adding isolated chargers across many cities would not necessarily create strong economics. Exponent needs enough chargers and enough compatible vehicles within the same markets to drive repeated usage.

A dense network can improve driver confidence and charging utilisation at the same time.

The company's growth therefore depends less on having the largest possible geographic footprint and more on building strong local clusters where vehicles and chargers reinforce each other.

What really matters

Exponent Energy's business is built around turning an EV battery sale into a longer energy relationship.

The company earns first by supplying battery systems through vehicle-manufacturing partners. Those same vehicles can then return to Exponent's charging network repeatedly, creating recurring energy demand long after the original vehicle has been sold.

Commercial vehicles make this model especially interesting because charging time has a direct financial cost. A driver who spends less time waiting can complete more kilometres and potentially earn more during the day.

For Exponent, that same charging speed can improve the utilisation of each charging station by allowing more vehicles to pass through the network.

The biggest challenge is scale. The company needs enough compatible vehicles to make its charging stations economical, while customers need enough charging stations before they are comfortable adopting compatible vehicles.

If Exponent can build both sides together, its advantage will not come from selling batteries alone. It will come from owning a larger part of the energy relationship throughout the commercial vehicle's operating life.