BYD BYD eMAX 7 cost per km
Exact running cost by city, daily distance, and electricity rate.
Running cost in Mumbai
That's 81% cheaper than petrol (₹6.56/km)
Your location
Pick your city for exact rates
Petrol comparison
What would petrol cost instead?
India avg ~₹105/L
At 16 km/L
₹6.56/km
Monthly fuel cost by daily commute
Based on Mumbai rates. Swipe table on mobile.
| Daily km | Monthly km | BYD BYD eMAX 7 | Petrol | You save |
|---|---|---|---|---|
| 10 km | 300 | ₹380 | ₹1,969 | ₹1,589 |
| 30 km | 900 | ₹1,140 | ₹5,906 | ₹4,766 |
| 50 km | 1,500 | ₹1,900 | ₹9,844 | ₹7,944 |
| 80 km | 2,400 | ₹3,040 | ₹15,750 | ₹12,710 |
| 100 km | 3,000 | ₹3,799 | ₹19,688 | ₹15,888 |
Annual savings at 40 km/day
₹77,322/ year
That's ₹3.87 L saved in fuel alone over 5 years of owning the BYD BYD eMAX 7, vs driving an equivalent petrol car.
How much does the BYD BYD eMAX 7 really cost to run?
At India's average residential electricity rate of ₹8/kWh, the BYD BYD eMAX 7 runs at approximately ₹1.06 per km — based on its efficiency of 7.58 km per kWh. For context, an equivalent petrol car doing 16 km/L at ₹105/L costs ₹6.56/km — nearly 6.2× more.
The per-km math
| EV efficiency | 7.58 km / kWh |
| Electricity cost | ₹8 / kWh (India avg) |
| EV running cost | ₹1.06 / km |
| Petrol mileage | 16 km / L |
| Petrol cost | ₹105 / L (India avg) |
| Petrol running cost | ₹6.56 / km |
What this means monthly
At the default Indian urban commute of 50 km/day (≈1,500 km/month):
- BYD BYD eMAX 7 electricity cost: ₹1,583/month
- Equivalent petrol cost: ₹9,844/month
- Monthly savings: ₹8,261/month
Over 5 years that's approximately ₹4.96 L saved in fuel alone — before counting maintenance and insurance savings.
Why electricity is cheaper
Burning 1 litre of petrol releases about 9.1 kWh of usable energy — but a petrol engine only converts ~20-25% of that to actual motion. The rest is heat lost through the radiator and exhaust. EVs convert ~85-90% of stored battery energy into motion. So you're paying for 4× less energy waste with an EV. That's the real reason the BYD BYD eMAX 7 crushes petrol on per-km cost — not because electricity is cheap in India (it isn't particularly), but because EVs are simply more efficient.
Caveats to the math
- DC fast charging (public networks) costs 2-3× home rates. The BYD BYD eMAX 7 would cost ₹2.64/km on DC if you charge exclusively there — still cheaper than petrol.
- Electricity slabs — once you cross 500 units/month, your tariff jumps. Most EV owners stay in the 300-500 slab shown above.
- Battery degradation — after 5-7 years, the BYD BYD eMAX 7's usable range drops 10-15%, which raises per-km cost slightly.
- Solar — if you have rooftop solar, the BYD BYD eMAX 7 can run at ~₹0.50/km during daylight charging.
BYD BYD eMAX 7 cost per km FAQs
What is the cost per km of the BYD BYD eMAX 7?+
The BYD BYD eMAX 7 costs approximately ₹1.06 per km at India's average electricity rate of ₹8/kWh. That's 84% cheaper than running a petrol car doing 16 km/L at ₹105/L (which costs ₹6.56/km).
How much does it cost to charge the BYD BYD eMAX 7?+
At ₹8/kWh and 7.58 km/kWh efficiency, driving 100 km in the BYD BYD eMAX 7 consumes about 13.2 kWh and costs roughly ₹106. A full charge from empty costs approximately ₹443.
What is the monthly fuel cost of the BYD BYD eMAX 7?+
Driving 50 km/day (1,500 km/month), the BYD BYD eMAX 7 costs approximately ₹1,583/month in electricity — vs ₹9,844/month for petrol. You save ₹8,261/month.
Does the BYD BYD eMAX 7 cost change by city?+
Yes — city electricity tariffs vary from ₹5.4/kWh (Chandigarh) to ₹10.7/kWh (Bangalore). Use the city selector above to see your exact cost. Most BYD BYD eMAX 7 owners report effective rates of ₹7-10/kWh after billing slabs and fixed charges.
Is public charging more expensive?+
DC fast charging at public networks typically costs ₹15-22/kWh (2-3× home rates), so ₹2.32–₹2.90/km. The math above assumes home charging — which is where 80%+ of EV kilometers are refueled in India.