by EVOS 7 December 2023
AC Charging: What’s the power difference?
AC chargers are differentiated by their power ratings (kW). The power outlet in your garage is commonly called a GPO and is rated at 2.4kW. Common AC charger power ratings in Australia are 3.5kW, 7.4kW, 11kW, and 22kW.How much power you can charge your EV will also depend on the size of the onboard charger. Most EVs in Australia will have an onboard inverter ranging from 7.6kW to 22kW.
| AC Power Rating | kWh Delivered in 1hr (99% efficiency) | km Added in 1hr | Time to Add 400km | km Added in 10hrs |
|---|---|---|---|---|
| GPO (2.4kW) | 2.376 kWh | 11.88 km | 33.7 hrs | 118.8 km |
| 3.5kW | 3.465 kWh | 17.325 km | 23.1 hrs | 173.25 km |
| 7.4kW | 7.326 kWh | 36.63 km | 10.9 hrs | 366.3 km |
| 11kW | 10.89 kWh | 54.45 km | 7.3 hrs | 544.5 km |
| 22kW | 21.78 kWh | 108.9 km | 3.7 hrs | 1089 km |
Speed vs. Power: An 11kW charger provides nearly three times the range in an hour compared to a 3.4kW charger. Therefore, upgrading to a higher power AC charger significantly boosts your charging speed.
Overnight Charging
The Big Trip: If you are planning a big trip or a holiday, you can be ready to drive with a full battery by just plugging in the night before.
Future-Proofing: As EVs evolve and come with larger battery capacities, having a more potent charger at home means you’re better prepared for the future. A 22kW charger, for instance, ensures quicker full charges even as batteries grow in capacity.
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