Installing an EV charger is more than mounting a box on a wall. The right setup depends on the charger type, your switchboard and supply, where the charger goes and what your network requires. This guide walks through each step so you can plan a safe, compliant installation and ask an installer the right questions.
Step 1: Choose the Charging Type
- Portable charger on a power point: the slowest option. It is convenient, but it puts a long continuous load on one outlet and circuit.
- AC wall charger: the standard home and workplace choice, installed on a dedicated circuit. On a single-phase 32 amp circuit it supports roughly 7 kW, and on three-phase supply it can support higher power, up to about 22 kW, if the car and the supply allow.
- DC fast charger: used at public and commercial sites. It needs a much larger supply and significant electrical and civil work, so it is a different project from a home install.
Your car’s onboard charger also limits the speed, so check what it accepts before you pay for a more powerful unit. The question of home versus public charging is covered in our guide to charging an electric car at home.
Step 2: Check Your Switchboard and Supply
A charger adds a large, continuous load. Before you buy one, an electrician should check the switchboard’s spare capacity and condition, the supply to the property and the cable run from the switchboard to the charger location. Ausgrid says that if your home is over 20 years old and has not been rewired, the meter may also need upgrading.
Read the signs you need a switchboard upgrade, and see how single-phase compares with three-phase supply when planning higher power.
Step 3: Approvals and Who Does the Work
- Licensed electrician: Ausgrid states that all electrical work inside a customer’s property must be carried out by a licensed electrical contractor.
- Network approval: Ausgrid says its approval is required where your electrician identifies that the supply needs to be upgraded, and you may need to notify Ausgrid before installing. It recommends the electrician completes the connection application for you.
- Retailer: your retailer, not the network, handles changes to your metering or tariff.
- Apartments and strata: shared car parks and body corporate rules add steps. Ausgrid points to Energy NSW guidance for apartments and multi-tenanted buildings.
Other networks, such as Endeavour Energy, have their own requirements, so check the rules for your address.
Step 4: Wiring Rules and Protection
The Australian wiring rules (AS/NZS 3000) cover EV charging. A charger should be on its own dedicated circuit, with the cable and protection sized for a continuous load and residual current protection suited to the charger. Your electrician selects the right equipment and tests it before handover.
Step 5: Choose the Location
- Put the charger as close as practical to the switchboard to shorten the cable run.
- Make sure the cable reaches the car’s charge port without being stretched or run across walkways.
- Protect the charger from weather and impact, in line with the manufacturer’s instructions.
- Think about a second car or a future car with a different port position.
Step 6: Plan for Load Management and Surge Protection
If your supply is limited or you plan more than one charger, dynamic load management reduces the charger’s output when the rest of the property is using a lot of power. Surge protection helps guard sensitive electronics against voltage spikes. Both are covered in dynamic load management and surge protection for home EV chargers.
Step 7: Rebates and Incentives
Government and retailer offers for chargers change often. Check the NSW Government website and your electricity retailer for current offers before you buy, and ask the installer whether the charger you are considering is eligible.
Step 8: Maintenance
Follow the manufacturer’s instructions for inspecting the charger and cable, keep vents and connectors clear, and apply firmware updates if the maker provides them. Have the charger checked if the cable is damaged, the unit trips, or it behaves unexpectedly.
Step 9: Future-Proof the Installation
- Run cable and conduit with spare capacity in case you upgrade the charger later
- Leave room in the switchboard for additional circuits
- Think about how solar or a battery might connect later
Business and Commercial Chargers
Commercial sites have more to plan: supply capacity, several chargers, payment or access control and the layout of the car park. A site assessment comes before any equipment is chosen.
Frequently Asked Questions
Can I install an EV charger myself?
No. Electrical work must be done by a licensed electrician. DIY wiring is dangerous and illegal.
Do I need a switchboard upgrade for an EV charger?
Not automatically. It depends on spare capacity and the charger’s power. An assessment confirms what is needed.
Do I need three-phase power for an EV charger?
No. Single-phase supply supports home charging, and three-phase allows higher power where the car can use it.
Do I need to tell my electricity network?
Sometimes. Your electrician will tell you whether a connection application or notification is needed for your address.
How do I choose between brands?
Check the charger’s power rating, compatibility with your car, warranty terms, whether it supports load management and what installation support the supplier offers.
Planning an EV Charger?
Tell IZCO your suburb, the charger you have in mind and whether the property is a home or a business, and the team will assess your switchboard and supply and explain your options through our EV car charger installation service. Ask for an assessment or phone 0470 123 811.
