Battery as a Service (BaaS) is changing how Indians can pay for an electric vehicle (EV) but is it actually a cheaper option in the long term?
Instead of buying the battery with the vehicle, the customer pays a lower upfront price and then pays a subscription or per-km charge for battery use.
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| BaaS is a better option for those whose EVs run less than 2,000 km in a month. |
Traditional ownership requires paying for the battery upfront, but the owner then avoids a separate battery rental.
What is BaaS and how does it work?
NITI Aayog says batteries can account for around 40 per cent of an EV’s overall cost.
Its battery-swapping policy describes BaaS as separating battery ownership from the vehicle, allowing users to buy an EV without the battery and pay a recurring fee for battery services.
The model can also shift battery degradation and replacement risks to the battery provider. In India, BaaS is now available in passenger cars.
JSW MG Motor India’s Windsor, for example, is currently offered under BaaS from Rs 9.99 lakh (Rs 990,000) plus battery rental starting at Rs 3.9 per km, while its conventional ex-showroom price starts at Rs 14.09 lakh (Rs 1.4 million).
That means the initial price gap is about Rs 4.10 lakh (Rs 410,000).
BaaS vs battery ownership: Numerical comparison
Consider a Windsor buyer driving 1,000 km a month. At Rs 3.9 per km, the BaaS battery charge would be Rs 3,900 a month, or Rs 46,800 a year.
Over five years and 60,000 km, that becomes Rs 2.34 lakh (Rs 234,000) excluding charging costs.
At 1,500 km a month, the battery rental rises to Rs 5,850 monthly, or Rs 70,200 annually.
Over five years, the cumulative battery rental would be Rs 3.51 lakh (Rs 351,000). At 2,000 km a month, it reaches Rs 7,800 a month and Rs 4.68 lakh (Rs 468,000) over five years.
In other words, ignoring financing, taxes, resale value and changes in BaaS pricing, a high-mileage owner can eventually pay more through BaaS than the initial battery-inclusive price difference.
But for the Windsor, the minimum distance an owner has to drive is 1,500 km.
When BaaS makes more financial sense
BaaS is attractive when the priority is reducing upfront expenditure. A buyer who drives relatively few kms can spread the battery cost over time rather than committing a large amount of capital on Day One.
It can also reduce exposure to battery degradation and replacement risk, depending on the contract.
The advantage is particularly relevant for commercial users, where downtime matters.
NITI Aayog notes that battery swapping can reduce charging downtime and improve utilisation, although the ecosystem remains constrained by standardisation and network availability.
Very importantly, under the BaaS model, the battery provider or leasing company pays for and handles battery replacement, not the car owner. This is because you do not own the battery and this is a ‘Big Plus.’
When battery ownership is better
Buying the battery can be more attractive for high-mileage users who expect to keep an EV for many years.
Once the battery is paid for, additional kms do not trigger a battery-rental charge.
Ownership can also make the economics simpler at resale, because the vehicle and battery are part of the same asset.
The downside is the higher initial purchase price and the buyer’s exposure to battery depreciation.
Buyers should also check minimum-km clauses, transfer rules, exit charges and whether battery rental changes with the financing partner.
E-Vroooom’s views
For low-to-moderate annual driving, BaaS can improve affordability and reduce the upfront barrier to EV ownership.
For high-mileage drivers and long-term owners, battery ownership can become more economical because there is no per-km battery payment.
The best choice, therefore, depends less on the EV’s sticker price and more on annual kms, ownership period, financing costs and the exact BaaS contract.

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