I was in a double garage in Ryde last month with a homeowner who had already bought his EV charger.
He showed me the box before I even looked at the switchboard. It was a 22kW unit he’d picked after a few nights of reading reviews and watching install videos. He wanted it mounted neatly on the garage wall next to where he parked.
Then I opened the switchboard on the other side of the house.
Single-phase. No spare capacity. Long cable run back through the kitchen wall and ceiling. His car wouldn’t even accept 22kW charging.
Within ten minutes, the conversation had nothing to do with the charger he’d bought. It was about what his house could actually support.
That’s where most EV charger installation conversations end up. People start with the charger, but the house makes the decision.
The switchboard decides more than the EV charger ever will
When I walk into a home, I don’t start in the garage. I go straight to the switchboard.
That’s where the real answers are. Whether there’s enough capacity for a dedicated circuit. Whether the home is single-phase or three-phase. Whether the existing protection is up to standard or needs upgrading before anything else happens.
A lot of homes around Gladesville, Ryde, and Chatswood weren’t built with EV charging in mind. You can’t just add a high-load appliance and hope everything else keeps working the same way.
Once you know what the board can handle, everything else falls into place. The charger type, the speed, even where it should be installed.
If you haven’t had your switchboard looked at yet, do that before buying anything. It saves you from guessing and getting it wrong.
📞 If you want a clear answer upfront, call DCN Electrical on 0404 863 975, and we’ll check what your setup can actually support before you commit to a charger.
Smart vs dumb EV chargers only matters if your house needs the “smart”
Most people assume smart chargers are the better option. In some homes, they are. In others, they add cost without changing how the charger gets used.
A standard charger delivers power as soon as the car is plugged in. That’s enough for plenty of households. Plug in at night, wake up to a full battery, repeat the next day.
Smart chargers start to make sense when there’s something to manage. Homes with solar, where you want to prioritise self-generated power. Homes with limited capacity, where the charger needs to accommodate other appliances. People on time-of-use tariffs who want to charge automatically are pushed into off-peak hours. Cars that can’t control their charging.
I’ve installed smart chargers that never get opened after setup. I’ve also installed them in homes where they stopped the main switch from tripping every evening.
The difference isn’t the charger. It’s how the house uses power.
Tethered vs untethered EV chargers look simple until you live with them
The choice feels straightforward when you’re comparing products online. It changes when you stand in your garage and think about how you actually use the space.
A tethered charger keeps the cable attached to the wall. You grab it and plug it in. No unpacking, no extra steps. That works well if the garage is clean, dedicated to parking, and has space to keep the cable out of the way.
In tighter garages, the cable becomes part of the clutter. I’ve had clients in Artarmon and Willoughby realise their “convenient” tethered cable would sit right where they walk, store tools, or open car doors.
Untethered chargers remove that issue. The wall stays clean, and you bring the cable out when you need it. That suits garages that double as storage or workspaces.
The right choice isn’t about convenience in theory. It’s about how your garage functions every day.
Single-phase vs 3-phase only matters if your car can use it
This is where expectations usually need adjusting.
Single-phase charging, around 7kW, is what most Sydney homes run. It adds enough range overnight for daily driving without any stress on the system.
Three-phase charging can go higher, but only if two things line up. Your home has a three-phase supply, and your car can accept that level of AC charging.
A lot of cars don’t.
I’ve had homeowners ready to pay for a three-phase upgrade, thinking it would cut their charge time in half. Once we checked the vehicle specs, the onboard charger limited the speed well below what they were planning for.
That’s money spent on capacity that never gets used.
Before making that call, check what your car can actually take. If you’re not sure, we can look it up and match the install to the vehicle properly.
📞 Call DCN Electrical on 0404 863 975, and we’ll make sure you’re not paying for a faster charger your car can’t use.
Installation cost comes down to where the switchboard sits
The charger itself is only part of the job. The bigger variable is how far it is from the switchboard and how difficult that path is to run safely.
I’ve done installs where the charger goes on the same wall as the board. Short cable run, minimal labour, straightforward job. Then there are homes where the cable has to go through walls, ceilings, or even underground to reach the garage. Same charger, different complexity, very different cost.
Distance adds materials, time, and compliance requirements. It’s the part most people don’t factor in until they get a quote.
Sometimes we can adjust the charger position slightly and save a significant amount on installation without affecting how it gets used. That’s the kind of detail that only comes out during a site visit.
What actually gets changed during an EV charger installation
Installing an EV charger isn’t just mounting a unit and connecting a cable.
Most jobs involve setting up a dedicated circuit so the charger runs independently. Protection devices often need upgrading to handle the load safely. In older homes, the switchboard itself can become the limiting factor.
I’ve worked in homes where everything was ready to go, and others where the charger was the smallest part of the job.
This is why the planning stage matters. Once the electrical side is set up properly, the charger does its job without causing issues elsewhere in the house.
Frequently Asked Questions about EV Charger Installations
Do I need a 3-phase power supply for EV charging?
No. Most homes charge perfectly well on single-phase overnight. Three-phase only becomes relevant if your home already has that supply and your car can use the extra capacity.
Is a smart EV charger worth it?
It depends on how your home uses power. If you have solar, limited capacity, or want automated scheduling, it can make a difference. If you plug in overnight and leave it, a standard charger often does the job just as well.
📞 If you’re unsure which way to go, call DCN Electrical on 0404 863 975, and we’ll walk you through what actually makes sense for your setup.
What’s cheaper, tethered or untethered chargers?
The price difference between the units is usually small. The bigger factor is how practical each option is in your garage. Choosing the wrong one often shows up as daily frustration rather than upfront cost.
Why do EV charger installations vary so much in price?
The main variables are distance from the switchboard, how complex the cable run is, and whether upgrades are needed to support the charger. Two homes can install the same unit and end up with very different costs because of the layout alone.
Conclusion
In reality, the house decides most of what happens with an EV charger installation. The switchboard, the cable path, and what the car can accept will shape the final setup long before brand or features come into it.
Once those are clear, the right charger becomes obvious.
If you want to get it right the first time, have the setup checked before you buy anything. It’s the simplest way to avoid paying for the wrong equipment or an installation that doesn’t fit your home.
📞 Call 0404 863 975 and DCN Electrical will map out the right EV charger setup for your home before you commit.
