As electric vehicles become increasingly popular in Tamil Nadu, one of the most common questions new EV owners ask is: "How much does it cost to charge an electric car?" The answer might surprise you — it's significantly cheaper than petrol, and with OnePlug's network, the savings are even greater.
In this guide, we break down the real-world costs of charging an EV in Tamil Nadu, compare it with petrol costs, and show you exactly how much you can save every month.
EV vs Petrol: Cost Per Kilometer Comparison
Let's compare the running cost of a typical petrol car (Maruti Baleno, ~20 km/L) with a popular EV (Tata Nexon EV, ~6.5 km/kWh) across different charging scenarios:
| Fuel / Charging Type | Rate | Cost Per KM | Monthly Cost (1,500 km) |
|---|---|---|---|
| Petrol (Baleno) | ~Rs 102/litre | Rs 5.10/km | Rs 7,650 |
| EV Home Charging | ~Rs 6/kWh (TN domestic) | Rs 0.92/km | Rs 1,385 |
| OnePlug DC Fast Charging | Rs 14 - 16/kWh | Rs 2.15 - 2.46/km | Rs 3,230 - 3,690 |
Key takeaway: Even with public DC fast charging at OnePlug, you save over 50% compared to petrol. With home charging, savings exceed 80%.
Monthly Savings: A Realistic Calculation
Let's take a typical Tamil Nadu commuter driving 1,500 km per month (about 50 km/day for work, errands, and weekend trips):
Petrol Car
Rs 7,650/mo
EV + OnePlug
Rs 3,460/mo
You Save
Rs 4,190/mo
That's over Rs 50,000 saved per year just on fuel costs. Factor in lower maintenance costs for EVs (no oil changes, fewer brake pad replacements) and the total savings climb even higher.
What Affects Your EV Charging Cost?
- Battery size & efficiency: Larger battery EVs like the Tata Nexon EV (40.5 kWh) cost more per full charge than smaller ones like the Tiago EV (24 kWh), but both deliver excellent cost-per-km.
- Charging speed: DC fast charging (like OnePlug) costs slightly more per kWh than home AC charging, but saves you hours of waiting time.
- Driving style & conditions: Highway driving at high speeds, heavy AC usage, and hilly terrain reduce efficiency. City driving is where EVs shine brightest.
- Electricity tariff: Tamil Nadu domestic rates (~Rs 4-7/kWh) are among the most EV-friendly in India. Night charging at home can be even cheaper.
OnePlug Charging Rates in Tamil Nadu
OnePlug operates 25+ CCS2 DC fast charging stations across Tamil Nadu and Kerala, with some of the most competitive rates in the region:
All OnePlug stations are CCS2 compatible and available 24/7. No subscription required — just scan, charge, and pay via the OnePlug app.