Why most people never actually need a full charge from empty
Home charging almost never means starting from a genuinely empty battery, most people plug in at whatever charge level they're at after the day's driving and top up overnight. For an average daily commute of 35 to 50km, a single-phase 7kW charger replenishes that in roughly 1 to 2 hours, leaving the rest of the overnight window as unused capacity. The "how long to charge" question people actually care about is almost always about topping up, not filling an empty battery from scratch.
The real math: battery size, charger power, and your car's own limit
A rough full-charge estimate is battery size in kWh divided by charger power in kW. A 60kWh battery on a 7kW charger works out to a little under 9 hours from genuinely empty, which is why overnight charging comfortably covers a full charge even on a larger battery. At 7kW, most EVs add roughly 40km of range for every hour plugged in, a figure worth knowing when you're estimating whether an overnight charge covers tomorrow's driving.
Why a bigger wall charger doesn't always mean faster charging
Every EV has its own onboard charger, and that's the real bottleneck, not the wall unit. If your car's onboard charger caps at 7kW, connecting it to a more powerful wall charger simply won't charge it any faster, the car itself won't accept more than it's built to. Most Australian EVs currently on the road have onboard chargers in the 7kW to 11kW range, with a genuine 22kW onboard charger still limited to a handful of specific models. For the full breakdown of which charger actually suits your car, see our 7kW vs 22kW guide.
What this means for choosing a charger
For most Sydney homes and most current EVs, a single-phase 7kW charger comfortably covers daily charging needs without paying for capacity the car can't actually use. If you're deciding between charger options for your specific setup, that's worth walking through properly rather than defaulting to the most powerful unit on the shelf.