EV Charging Cost Per Unit in India | Complete Guide
EV Charging Cost Per Unit in India In India, electricity is billed in units, where 1 unit = 1 kWh (kilowatt-hour). The cost to charge an electric vehicle per un
EV Charging Cost Per Unit in India
In India, electricity is billed in units, where 1 unit = 1 kWh (kilowatt-hour).
The cost to charge an electric vehicle per unit varies significantly depending on whether you charge at home, use a dedicated EV sub-meter, or use a public DC fast-charging network.
1. Average Cost Per Unit (kWh) Across Charging Types
| Charging Mode | Typical Cost per Unit (₹/kWh) | Billing Structure | Primary Use Case |
|---|---|---|---|
| Home Domestic AC | ₹4.50 – ₹9.00 | Normal household slab tariff | Overnight 3.3 kW / 7.4 kW charging |
| Home Dedicated EV Meter | ₹4.50 – ₹6.50 | Single flat EV tariff set by state DISCOM | Dedicated LT EV connection |
| Public AC (Destination) | ₹8.00 – ₹15.00 | Energy rate + CPO service fee + 5% GST | Malls, offices, hotels (7.4 kW – 22 kW) |
| Public DC Fast Charging | ₹16.00 – ₹25.00 | Energy rate + high-power fee + 5% GST | Highway hubs (30 kW – 120+ kW) |
2. Dedicated State DISCOM EV Tariffs
State Electricity Regulatory Commissions (SERCs) may provide special Low Tension (LT) EV tariff categories for residential and commercial EV charging connections.
| State / DISCOM | Indicative Energy Charge (₹/kWh) |
|---|---|
| Delhi (BSES / TPDDL) | ₹4.50 / unit |
| Gujarat (UGVCL / DGVCL) | ₹4.10 / unit |
| Karnataka (BESCOM) | ₹5.00 – ₹5.80 / unit |
| Maharashtra (MSEDCL) | ₹6.08 / unit |
| Kerala (KSEB) | ₹5.50 / unit |
| Uttar Pradesh (UPPCL) | ₹5.50 / unit |
Note: Fixed charges, fuel adjustment surcharges (FPPCA), and state electricity taxes may apply depending on the local electricity utility.
3. How to Calculate Total EV Charging Cost
During charging, some energy is lost through AC-to-DC conversion, battery heating and other charging processes. A practical estimate is that charging efficiency may be around 88%, although actual efficiency varies by vehicle, charger and conditions.
Therefore, the electricity drawn from the grid can be slightly higher than the energy stored in the battery.
Grid Units Consumed (kWh) = Energy Added to Battery (kWh) ÷ Efficiency Factor
Total Session Cost (₹) = Grid Units Consumed × Rate per Unit
Example: Charging a 40 kWh Battery from 20% to 80%
- Energy needed in battery: 40 kWh × 60% = 24 kWh
- Estimated grid draw with losses: 24 kWh ÷ 0.88 ≈ 27.27 units
- At home (@ ₹7.00/unit): 27.27 × ₹7.00 ≈ ₹191
- At a public DC fast-charging station (@ ₹21.00/unit): 27.27 × ₹21.00 ≈ ₹572
4. EV Charging Cost Per Kilometre & Monthly Running Comparison
Consider an EV efficiency of approximately 7 km per kWh and a monthly driving distance of 1,200 km.
| Fuel / Charging Option | Rate Metric | Cost Per Kilometre | Monthly Cost (1,200 km) |
|---|---|---|---|
| Home EV Charging | ₹7.00 / unit | ₹1.00 – ₹1.15 / km | ₹1,200 – ₹1,380 |
| Public Fast DC Charging | ₹21.00 / unit | ₹3.00 – ₹3.40 / km | ₹3,600 – ₹4,080 |
| Petrol Car (14 km/L) | ₹102.00 / litre | ₹7.28 / km | ₹8,736 |
Annual Savings: Charging primarily at home can potentially save ₹85,000+ per year compared with an equivalent petrol vehicle under these illustrative assumptions.
Key Takeaway
EV charging costs depend on the electricity tariff, charging location, charger type, vehicle efficiency and applicable fees. Home charging is generally more economical, while public DC fast charging offers greater convenience and speed for long-distance travel.