Electric vehicle advertisements talk about saving on fuel. Petrol loyalists talk about the high purchase price and battery worries. Both are right about something. The honest answer depends on how far you drive and where you charge, and it can be worked out with simple arithmetic.
Running cost: where EVs win clearly
A petrol hatchback or compact SUV that returns 15 km per litre, with petrol at ₹105, costs ₹7 per km to run. An electric car of similar size typically covers 6 to 8 km per unit of electricity. At a home tariff of ₹8 per unit, and allowing 10% loss while charging, that is about ₹1.27 per km.
For someone driving 1,000 km a month, that is ₹7,000 on petrol versus about ₹1,270 on electricity. The difference, roughly ₹68,000 a year, is the core of the EV case.
The purchase price gap
An EV usually costs more than the petrol version of a similar car. The gap has narrowed but can still be ₹2 to 4 lakh. Divide that gap by your yearly saving and you get the payback period. At 1,000 km a month and a ₹3 lakh gap, it is about four and a half years. At 500 km a month, it doubles to nine years, which is why low-mileage drivers often do not benefit.
The costs people forget
- Maintenance. An electric motor has far fewer moving parts than an engine. No oil changes, no clutch, no exhaust. Routine service is typically cheaper, though tyres can wear slightly faster because EVs are heavier.
- Insurance. Premiums are linked to the vehicle's value, so a more expensive EV costs more to insure.
- Charging setup. A home wall charger and any wiring upgrade is a one-time cost. Flat owners may need society approval for a parking-level charger.
- Battery. Most manufacturers warranty the battery for 8 years or around 1.6 lakh km. Batteries lose capacity gradually rather than failing suddenly.
- Resale. The used EV market in India is still young, so resale values are less predictable than for popular petrol models.
Where the engineering matters
An internal combustion engine converts only about a quarter to a third of the fuel's energy into motion. The rest becomes heat. An electric drivetrain converts well over 80% of the battery's energy into motion and recovers some energy while braking through regenerative braking. That efficiency gap, not cheap electricity alone, is why EVs cost so little per km.
Who should buy an EV today?
You are a strong candidate if you drive more than 800 to 1,000 km a month, can charge at home or work, and keep cars for six years or longer. You are a weaker candidate if you drive little, rely mainly on public fast charging, or frequently take long highway trips through areas with sparse charging.
Electric two-wheelers are an even easier decision. Their price gap over petrol scooters is small, they run at well under ₹0.50 per km, and they charge from a normal socket.
Frequently asked questions
How much electricity does charging an EV at home add to my bill?
Driving 1,000 km a month at 7 km per unit adds about 160 units after charging losses. Check whether that pushes you into a higher tariff slab.
Is EV range enough for city use?
Most electric cars deliver 250 to 400 km of real range, which covers a week or more of typical city driving on one charge.