EV Charger Installation

A home EV charger is an electrical job first, and a charger second

The box on the wall is the easy part. What makes a car charging station for home work is the circuit behind it: whether your switchboard has the capacity, whether your supply is single or three-phase, how far the cable has to run, and whether the charger can see your solar and battery so the car fills on sunshine instead of grid power at night. That circuit is what our EV charger installation is built around.

Deionno Electrical & Solar is an electrical contractor that installs solar, batteries and EV chargers with its own licensed electricians, across Adelaide for ten years and now on the Sunshine Coast. We fit Sigenergy, Tesla Wall Connector and GoodWe chargers, and we’ll install a charger you’ve already bought, as long as it meets the Australian standard. Every job gets a dedicated circuit, its own protection at the board, a compliance certificate and a 10-year workmanship warranty.

What a home EV charger installation includes

• A site check of the switchboard and supply. Main switch rating, spare ways, existing solar and battery breakers, and whether the supply is single or three-phase.
• A dedicated circuit. Cable sized for the charger’s full current and the length of the run, from the switchboard to the charger, in conduit where it is exposed.
• Protection at the board. The charger gets its own breaker and the type of safety switch an EV charger needs. If the board has no room or no safety switch, we say so before the quote, not on the day.
• The charger, mounted and commissioned. Wall or post, cable reach checked against where the car actually parks, then connected to Wi-Fi and the maker’s app, with solar charging set up where the charger supports it.
• Paperwork. An electrical certificate of compliance, and the network notification or application where the charger still needs one.
• A handover. How to start and schedule a charge, what the lights mean, and how to read the charging in the app.

What EV charger installation costs

We don’t sell fixed-price charger packages, because the price is mostly the electrical work and the electrical work depends on the house. Four things move it. The charger you choose: a 7 kW single-phase unit costs less than a 22 kW three-phase one. The distance from the switchboard to the parking spot, and what the cable has to pass through on the way. Whether the switchboard needs a new breaker, a new safety switch or a bigger upgrade. And whether you want the charger on a post rather than a wall. A charger beside a garage switchboard is a short job. A charger on a carport 40 metres away on a rural block is a cable job first. The on-site assessment is free and the quote is written.

7 kW or 22 kW: what your home and car can use

A 7 kW charger runs on a single-phase supply at 32 amps and adds roughly 35 to 40 km of range for every hour on charge, which is a full overnight charge for most cars. A 22 kW charger needs three-phase supply, and most cars can’t use all of it: the car’s own onboard charger caps AC charging, commonly at 7 kW or 11 kW. A 22 kW unit on a three-phase home still makes sense when the car can take 11 kW, when two cars will share it, or when the house has three-phase anyway. On a single-phase home, 7 kW is the practical ceiling, and it’s plenty.

Single-phase, three-phase and your switchboard

A 32 amp charger is the biggest single load most homes have ever had. On a single-phase supply with a 63 amp main, a charger running flat out alongside the oven, the air conditioner and a hot water element can push past the main fuse. The answer isn’t always a bigger supply: a charger that can drop its rate when the house is busy, or a scheduled charge after the evening peak, usually solves it. On a three-phase home the charger sits on its own phase or across all three, and the load question largely goes away. Either way we work out the maximum demand before we quote, because the network asks for it and because tripping the main switch at 2 am isn’t a good way to find out.

Charging an EV from solar and a home battery

Two different things get called solar charging. A charger that follows the roof holds the car at whatever surplus the solar is making, so a 10 kW array on a clear day puts most of its midday output into the car instead of exporting it for a few cents. A charger with a schedule just runs at full rate in a window you pick, which is fine on an off-peak tariff but will pull from the grid once the sun drops. Sigenergy, GoodWe and Sungrow chargers follow the roof through the inverter’s own app, and a Tesla Wall Connector does the same through the Tesla app when a Powerwall is on the house. A home battery is sized for the house, not the car; it will top the car up in the evening, but the real saving is daytime charging from the panels.

Sigenergy, Tesla Wall Connector and GoodWe chargers

• Sigenergy. The charger we fit most, in 7 kW single-phase and 11 or 22 kW three-phase. On a home with a SigenStor battery it sits in the same app and can charge the car from solar, from the battery, or on a schedule. Sigenergy also makes a DC charger that charges straight from the battery stack at up to 12.5 kW, which we have installed on the Sunshine Coast.
• Tesla Wall Connector. The Tesla unit charges any car with a Type 2 socket, not only Teslas, and pairs with a Powerwall for solar charging through the Tesla app. We are a Tesla Powerwall certified installer, so the two go in as one design.
• GoodWe. For homes with a GoodWe inverter and battery, the GoodWe charger keeps everything in one app, in 7 kW and 22 kW versions.
• Your own charger. If the car came with a wall unit, or you’ve bought one yourself, we fit it. The circuit, the protection at the board and the certificate are the same as for a charger we supplied.

Network rules in South Australia and South East Queensland

Both networks changed their home charger rules in the second half of 2026, and most installer websites have not caught up.

• South Australia. Since 11 September 2026, a standard home charger (a Level 2 unit that cannot feed power back to the grid) no longer needs an application through the SA Power Networks portal. The old rule asked for approval above 20 amps single-phase or 25 amps three-phase on a 100 amp supply. The installing electrician still lodges an electrical certificate of compliance for every install, and a vehicle-to-grid or bidirectional charger still needs a pre-installation application, because the network treats it as a battery system [1] [2].
• South East Queensland. From 1 October 2026, Energex withdrew the clause that made single-phase chargers above 20 amps managed connections on supplies of 100 amps per phase or less. A dedicated single-phase charger can now be installed to AS/NZS 3000 without a network management device. The electrician still has to assess the premises’ maximum demand, and where it would exceed the service fuse rating the connection may need an upgrade. A three-phase 22 kW charger is allowed at a three-phase premises, and vehicle-to-grid equipment still needs a connection application [3].

We handle the paperwork in both states as part of the job, and we tell you before the quote if your charger size or supply needs a network step first.

Where the charger goes: garages, carports, posts and long runs

Inside the garage next to the switchboard is the short answer. Outside on a brick wall under a carport is nearly as easy, with the cable in conduit. A post in the driveway means a trench and a longer run. We’ve run 50 metres of heavy cable to a shed and carport on a rural block, and mounted a charger between two garage doors so the cable reaches whichever bay the car uses. The cable on the charger itself is usually 5 to 7 metres; we check it reaches the car’s charge port from where it will be mounted, because the port is on a different corner of every car.

EV charger installation in Adelaide and on the Sunshine Coast

Adelaide and South Australia

Our Adelaide electricians have installed chargers from Reynella to Greenwith, Kidman Park to Nairne, on single-phase and three-phase homes, with the SA Power Networks paperwork done as part of the job. We cover the metro area, the Hills, the Fleurieu and the Barossa from the Salisbury Plain base. Area details on the Adelaide solar installer page.

Sunshine Coast and South East Queensland

From the Corbould Park base our Sunshine Coast electricians cover Caloundra to Noosa, the hinterland, Gympie and north Brisbane, with Energex requirements handled for you. Recent jobs include a Sigenergy DC charger in Buddina and a full solar, battery and charger install on a new home in Banya. Area details on the Sunshine Coast solar installer page.

EV chargers and the rest of the house

If you are weighing up solar at the same time, the home solar installer page covers how we size an array from your bills, and a car on the driveway is one of the loads we size for. If a battery is on the list too, the solar battery installer page explains how the three fit together on one switchboard.

Sources

1. SA Power Networks, Installing Level 2 Electric Vehicle (EV) Chargers no longer requires approval from SA Power Networks, 11 September 2026.
2. SA Power Networks, Electric vehicle charger installations.
3. Energex, EV charging and connections, including the withdrawal of QECM clause 8.14.4(b) from 1 October 2026.