BYD Atto 3 home charging in Perth: the setup that actually suits it
The Atto 3 has a 7kW AC ceiling. That single spec changes what charger and what circuit you should install for it.
The BYD Atto 3 has been one of the top selling EVs across Perth for two years and it has a spec that trips people up: its onboard AC charger tops out at 7kW. Not 11kW, not 22kW. Seven.
That single number should drive the whole home charging decision.
Why paying for 22kW is wasted on an Atto 3
A 22kW three phase charger costs more, and requires three phase to the property. Plugging one into an Atto 3 will not charge the car any faster than a 7kW single phase unit would. The car simply refuses to draw more than 7kW on AC. The 22kW spec on the wall unit becomes decorative.
If you have three phase for other reasons, a 22kW unit is still fine (and future proofs against a second EV that supports higher rates). But do not upgrade to three phase for the Atto 3 alone.
The right setup for most Atto 3 owners
- Single phase 7kW smart charger (Tesla Wall Connector, Zappi, Wallbox Pulsar or Ocular LTE).
- Type 2 socket - the Atto 3 uses the same connector as every other new EV in Australia.
- Solar diversion if you have PV. The Atto 3 has a 60 kilowatt hour battery, easy to fill on excess solar over a Perth summer week.
Overnight numbers
From 20 percent to 80 percent on a 7kW home charger, an Atto 3 takes about 5 hours. Plugged in at 10pm on a Synergy EV off peak tariff, the car is full and cheap by 3am.
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