Electricity usage at home can differ greatly, influenced by household size and appliance use. Typically, a household consumes about 4,000kWh annually before owning an electric vehicle (EV). The Australian Energy Market Commission (AEMC) provides comprehensive information on household energy use and costs. EV energy consumption varies with the vehicle type, driving frequency, and driving style.
For instance, a car used mainly for short local trips consumes significantly less energy than one used for extensive daily commuting and weekend activities. By considering the average annual driving distance of 14,000km and an EV efficiency of 17kWh/100km, we estimate an additional electricity need of roughly 2,400kWh per car per year. However, about 10% of this electricity is obtained from fast charging stations during longer trips, meaning the actual increase in home electricity use per EV is around 50%, with considerable variation.
Fortunately, most households won't need to upgrade their electrical connections, as EV charging can be scheduled during low-energy-demand periods. Moreover, charging an EV during off-peak hours is significantly cheaper than the cost of petrol for the same distance.