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.
As charging points 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, this is only half the story as 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 3kW: 6-8 hours
- Fast AC 7kW: 3-4 hours
- Rapid AC/DC 43/50kW: 30-45 mins for 80%