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EV Home Charging Cost Calculator
Estimate EV charging energy, cost, and time from battery size, SOC, efficiency, tariff, and charger power.
Formula
battery_energy_added_kwh = capacity * (target_soc - start_soc) grid_energy_kwh = battery_energy_added_kwh / efficiency charging_cost = grid_energy_kwh * tariff charging_time_hours = grid_energy_kwh / charger_power_kw
Assumptions
- Inputs are user-provided.
- Results are preliminary estimates.
- Charger power and tariff are constant.
Limitations
- Real charging can slow near high SOC and may include losses not modeled here.
Methodology
Converts SOC difference into battery energy and adjusts for charging efficiency.
This calculator provides an estimate for informational purposes only. It is not a certified engineering design, electrical safety approval, or professional installation recommendation. Always verify final decisions with a qualified professional and applicable local codes.