Single-Phase vs Three-Phase EV Chargers: Which Do You Need?

When it comes to installing an EV charger at home or at work, one of the first decisions is whether to choose a single-phase or three-phase charger. The right choice depends on your property’s electrical supply, your charging needs, and the type of electric vehicle you own.

What Does Single-Phase Mean?

Most Australian homes are powered by a single-phase supply. This means electricity is delivered through one live wire, giving you:

• 7kW charging speed with a compatible EV charger.

• A full charge in 6–12 hours, depending on your EV battery size.

• A reliable, cost-effective setup that suits overnight charging.

Single-phase is more than enough for most households with one EV and regular daily driving.

What is Three-Phase Power?

Three-phase supply is common in larger properties, new builds, or commercial settings. It delivers electricity across three live wires, offering:

• Up to 22kW charging speed.

• Faster charging times, often 2–4 hours for a full battery.

• The ability to support multiple EVs or high-demand appliances.

Three-phase is ideal for businesses, households with more than one EV, or drivers who need rapid turnaround charging.

Single-Phase vs Three-Phase: Key Differences

• Charging Speed: Single-phase maxes at 7kW; three-phase delivers up to 22kW.

• Cost: Single-phase installations are generally simpler and more affordable.

• Availability: Most existing homes are single-phase; upgrading to three-phase may require electrical work.

• Suitability: Single-phase is fine for daily commuting; three-phase is better for high usage or fleets.

How to Know What Supply You Have

Not sure if your property has single or three-phase? Lektrix can check this during your initial survey. A quick look at your switchboard usually reveals the answer, one main breaker means single-phase, three breakers mean three-phase.

Choosing the Right Charger for Your Home

When deciding between single and three-phase EV chargers, consider:

• How often you drive and how far

• Whether you have or plan to add solar panels

• If you’ll need to charge more than one EV

• Your budget for installation and upgrades

At Lektrix, we’ll guide you to the right solution, whether it’s a single-phase 7kW unit for overnight charging or a three-phase 22kW system for maximum flexibility.

Install with Confidence

As an accredited Zappi EV charger installer, Lektrix ensures your installation is safe, compliant, and tailored to your energy needs.

Get a Quote today to find out whether single-phase or three-phase charging is right for you.