The speed with which an EV can be fully recharged is dependent on three factors; the charger type (max power available), the model specification, and the battery capacity of the EV.
EV Chargers can be defined by their maximum power rating – Slow (3kW), Fast (7-22kW) and Rapid (50kW+) – the charger type indicates how quickly an EV could charge. However, some electric vehicles are limited in how quickly they can recharge due to the specification of the on-board charger. For example, an EV with a 3kW on-board charger connected to a 7kW charging point can only charge at 3kW.
To complicate matters, if an EV has a large capacity battery, this inevitably will take longer to charge even if the power (rate) is high. In general, EVs with relatively long ranges will have larger battery capacities and therefore take longer to recharge on a particular charging point.
While only an indication, for an average EV, typical recharge times are as follows:
- Slow AC Charging 3kW (16A) : 6-8 hours, best suited for overnight charging;
- Fast AC Charging 7kW (32A) : 3-4 hours; typical charging unit for the home
- Rapid AC Charging 43kW (190A): 45 mins
- Rapid DC Charging 50kW: 30 mins; which are able to provide an 80% charge in around 30 minutes