Low slab (0-100 units)
₹4.7
per kWh
EV owners (300-500 units)
₹7.6
per kWh — your typical rate
High slab (500+ units)
₹9.6
per kWh
Full-charge cost by battery size in Tamil Nadu
At Tamil Nadu's domestic rate of ₹7.6/kWh.
| Battery | Home (₹7.6/kWh) | DC fast (~₹20/kWh) | Petrol equivalent |
|---|---|---|---|
| 20 kWh | ₹152 | ₹400 | ₹222 |
| 30 kWh | ₹228 | ₹600 | ₹333 |
| 40 kWh | ₹304 | ₹800 | ₹444 |
| 50 kWh | ₹380 | ₹1,000 | ₹555 |
| 70 kWh | ₹532 | ₹1,400 | ₹778 |
| 100 kWh | ₹760 | ₹2,000 | ₹1,111 |
Per-km running cost for top EVs in Tamil Nadu
Based on Tamil Nadu's ₹7.6/kWh rate — home charging assumed.
Porsche Porsche Cayenne Electric
From ₹0
Mahindra Mahindra Vision S
From ₹0
Volkswagen Volkswagen ID.4
From ₹0
VinFast VinFast Wild
From ₹0
VinFast VinFast VF9
From ₹0
VinFast VinFast VF8
From ₹0
VinFast VinFast VF5
From ₹0
VinFast VinFast VF3
From ₹0
VinFast VinFast VF e34
From ₹0
VinFast VinFast Limo Green
From ₹0
EV charging cost in Tamil Nadu — FAQs
What is the electricity rate for EV charging in Tamil Nadu?+
The domestic tariff in Tamil Nadu is approximately ₹7.6/kWh (300-500 unit slab, where most EV-owning households land). Lower slab (0-100 units) is ₹4.7/kWh and higher slab (>500 units) is ₹9.6/kWh. After fixed charges and duties, most EV owners in Tamil Nadu report an effective rate of ₹8.2-8.7/kWh.
How much does it cost to fully charge an EV in Tamil Nadu?+
At ₹7.6/kWh, fully charging a 30 kWh battery in Tamil Nadu costs ₹228, and a 50 kWh battery costs ₹380. A popular mid-range EV like the Tata Nexon EV (30 kWh) costs about ₹228 for a full charge at home.
Is public DC fast charging expensive in Tamil Nadu?+
Public DC fast chargers in Chennai and other Tamil Nadu cities typically charge ₹18-22/kWh — roughly 2-3× home rates. Fully charging a 40 kWh EV on public DC costs ₹720-880 vs ₹304 at home. Use home charging for daily needs; public DC only for long-distance trips.
How does EV running cost in Tamil Nadu compare to petrol?+
Average EV running cost in Tamil Nadu: ₹1.07/km. Petrol running cost (at ₹101.1/L in Tamil Nadu): ₹6.76/km. EVs are approximately 84% cheaper to run here.
Are there any EV subsidies in Tamil Nadu?+
Yes — 100% motor vehicle tax waiver. Check our /subsidy/tamil-nadu page for the latest details.