Can I Install a 7 kW EV Charger on Single Phase?

How a 7 kW Charger Uses Your Single Phase Supply

A 7 kW charger on single phase draws around 32 amps at 240V. That's a dedicated 32A circuit — similar in scale to a large air conditioner or an electric oven. It's not a trivial load, but it's well within what a normal residential single phase supply is designed to handle.

For most EVs, a 7 kW charger will add somewhere between 35 and 50 kilometres of range per hour of charging. For typical overnight charging, that's more than enough for the majority of drivers. If you're doing big rural distances regularly — say, running between Goulburn and Yass and back each day — you might want to think about whether a higher capacity charger makes sense, but for most people, 7 kW is the practical sweet spot on single phase.

What Needs to Be Checked Before Installation

This is where the honest answer gets a bit more nuanced. Whether a 7 kW charger is straightforward to install at your place depends on a few things that vary from property to property.

First is your supply capacity. Most suburban and rural homes have a single phase 63A or 100A main fuse. A 32A EV charger circuit on a 63A service is workable but leaves less headroom for everything else running at the same time. Your electrician needs to look at what's already connected and what the realistic peak load is.

Second is your switchboard. Older switchboards — and there are plenty of them out on the Southern Tablelands — may have ceramic fuses, limited spare ways, or no room for a dedicated circuit breaker and RCD protection. Sometimes a switchboard upgrade is needed before an EV charger can be added safely and legally.

Third is the cable run. Where is your switchboard relative to where you want to park and charge? A garage attached to the house is one thing. A shed 80 metres away down the back of a rural block is another. Longer runs mean bigger cable to keep voltage drop in check.

Fourth is any metering or network requirements. Your local distribution network may have specific requirements around EV charger installations, particularly for properties in regional NSW. It's worth knowing what applies before you commit to equipment.

Three Phase vs Single Phase — Do You Need to Upgrade?

If you already have three phase power at your property, a 7 kW charger can be wired across one phase, or you can look at a three phase charger that spreads the load and can deliver higher charge rates depending on the car. But if you only have single phase, there's no need to upgrade your supply just to run a 7 kW charger — single phase handles it fine.

Some people in rural areas around Dalton, Gunning or Jerrawa have three phase available because of farm equipment or irrigation. If that's you, it's worth mentioning to your electrician so they can recommend the most sensible approach for your setup. But again, three phase is not a requirement for a 7 kW charger.

Choosing the Right Charger

There's a reasonable range of 7 kW single phase EV chargers on the market. The things worth paying attention to are whether it's certified for use in Australia, whether it has a Type 2 connector (which suits most current EVs sold here), and whether it has useful features like scheduling, load management or app control.

Load management is worth a mention — some chargers can automatically reduce their draw if the rest of the house load goes up. That can be handy if your supply capacity is on the tighter side. It's not always necessary, but it's a useful feature to know exists.

Your electrician can give you sensible guidance on what suits your situation. The charger that looks good in a YouTube review might not be the right fit for a rural property with a long cable run and a 63A main fuse.

When You Should Get an Electrician Involved

EV charger installation is licensed electrical work in NSW. It needs to be done by a licensed electrician, and the work needs to be certified. That's not a bureaucratic hurdle — a 32A circuit feeding a device that connects to your car is something you want done properly.

You should get an electrician out to assess your setup before you buy anything. It's easy to order a charger based on what you've read online, only to find out the installation needs a switchboard upgrade or a much longer cable run than expected. A quick site visit sorts that out early.

If your property is rural, has a shed or outbuilding where you want to charge, or has an older electrical installation, that's all the more reason to get eyes on the job first. Properties across the Southern Tablelands vary enormously — what's straightforward at a newer house in Yass might need more thought at a rural block near Jerrawa.

EV Charger Installation with SECS Electrical

SECS Electrical installs EV chargers at homes and rural properties across the Southern Tablelands, including Gunning, Dalton, Yass, Goulburn and surrounds. We're based near Jerrawa, so we know the area and the kind of electrical setups that come with rural and semi-rural properties.

We'll assess your existing supply, switchboard and cable routing, give you a straight answer on what's involved, and install the charger properly with all the required certification. If there's a complication — older switchboard, long cable run, unusual supply setup — we've got the background to sort it out without making it more complicated than it needs to be.

NSW Electrical Contractor Licence 199041C.