EV Range Added per Hour of Charging

The number that sizes an EVSE to a commute or a fleet's daily miles. Range per hour = EVSE power (kW) x charge efficiency x the vehicle's efficiency (mi/kWh): the kilowatts delivered, after the ~10-15% AC losses, times how far the car goes per kWh. A 7.7 kW Level 2 charger at 88% on a car getting 3.5 mi/kWh adds ~23.7 mi of range per hour, so a 100-mile commute replenishes in ~4.2 hr, comfortably overnight. A 9.6 kW circuit adds range proportionally faster, but the vehicle's ONBOARD charger caps the AC rate, and a less efficient vehicle (truck / cold weather) adds fewer miles/hr. A steady AC Level 2 estimate; DC fast charging tapers, and the onboard-charger limit and actual efficiency govern.

range_added_mi_per_hr = evse_power_kw x charge_efficiency x vehicle_efficiency_mi_per_kwh; hours_to_add_target = target_range_mi / range_added_mi_per_hr.

EV range-added-per-hour of AC Level 2 charging (energy identity; SAE J1772 onboard-charger limit), by name; the vehicle's onboard charger and actual efficiency govern.

The range-per-hour relation is a public energy identity; the EVSE power, charge efficiency, and the vehicle's mi/kWh are the charger and vehicle values the user supplies.

Estimate. AHJ and licensed professional govern.

Field names used by the API: evse_power_kw, charge_efficiency, vehicle_efficiency_mi_per_kwh, target_range_mi, range_added_mi_per_hr, hours_to_add_target

• Range-per-hour identity range/hr = EVSE kW x charge efficiency x mi/kWh; hours = target range / (range/hr)energy identity
• Onboard-charger cap AC rate is capped by the vehicle's onboard charger (a bigger EVSE does not charge faster, see ev-charge-time); DC fast charging tapers separatelySAE J1772 / vehicle spec