Electric Mobility

EV Charging Cost Calculator

Electric vehicles aren't 100% efficient. Calculate the true cost of a full charge by factoring in AC-to-DC conversion losses at your home meter.

Battery & Tariffs

e.g. Nexon EV LR is 40.5 kWh.

Energy lost as heat during AC-DC conversion.

Check your EB bill for top slab rate.

Usually ₹15-₹22 plus 18% GST.

Full Charge Cost (0 to 100%)

At Home

₹362.88

Public DC

₹729.00

Units billed at home45.4 kWh
Running Cost (Home)₹1.38 / km

Assuming conservative 263 km range.

The "Hidden" Cost of Home Charging

  • AC to DC Conversion: Electricity from your home wall socket is AC (Alternating Current). EV batteries can only store DC (Direct Current). Your car has an "Onboard Charger" that converts the AC to DC while charging.
  • Efficiency Loss: This conversion process generates heat, leading to energy loss. Typically, an EV loses 10% to 15% of the power drawn from the wall. This means to put 40 units into the battery, your home electricity meter will actually record ~45 units of consumption.
  • Public DC Fast Chargers: Public fast chargers are massive machines that convert AC to DC before it enters your car. Because they pump DC directly into the battery, there is almost zero conversion loss, and you are billed exactly for the kWh dispensed. However, their base tariffs are 2x to 3x more expensive than home electricity.
  • The Verdict: Even with a 15% efficiency loss, charging at home (₹1 to ₹1.5 per km) remains vastly cheaper than public fast charging or driving a petrol car (₹6 to ₹9 per km).