You’ve made the switch to an electric vehicle — or you’re seriously considering it. Home charging sounds simple enough: plug in at night, wake up to a full battery. But before you assume your home is ready, there are some important electrical realities every homeowner on the Fleurieu Peninsula should understand first.
Home EV charging is one of the most significant new demands being placed on residential electrical systems in Australia. Done correctly, with the right equipment and the right infrastructure in place, it is safe, convenient, and cost-effective. Done without proper preparation, it can place your home’s electrical system under sustained stress it was never designed to handle — and in the worst cases, that means real risk. This post is not here to discourage you from making the switch. It is here to make sure you go into it informed.
Ensure you have a dedicated electric vehicle charging point installed in a safe and accessible location. Don’t forget to also consider ARC protection too. BCS Electrical can assess your current system, and also install electric vehicle charging points throughout the Fleurieu.
How Home EV Charging Actually Works
Most EV owners charge at home overnight, which makes sense — your car sits idle for eight or more hours, and a full charge is ready by morning. There are two main options for how that charging happens.
The first is a standard 10-amp power point, sometimes called Mode 2 charging. You plug a cable directly from the car into an existing outlet. It works, but it is slow — typically adding around 10 to 15 kilometres of range per hour — and it is not designed for the sustained, nightly load that EV charging demands. A standard power point circuit is not built to run at near-full capacity for six to ten hours every night. Over time, this kind of continuous use can cause wear on the outlet, the wiring, and the circuit — particularly in older homes.
The second, and strongly recommended, option is a dedicated EV charging unit — often called an EVSE (Electric Vehicle Supply Equipment) or home charger. These units are hardwired by a licensed electrician on a dedicated circuit and can deliver significantly faster charging speeds. A typical single-phase home charger delivers around 7 kilowatts, adding roughly 40 kilometres of range per hour. For most Fleurieu Peninsula households, this means a full charge overnight without any compromise to vehicle range or battery health.
A dedicated EV charger is the right way to charge at home. But installing one is not simply a matter of running a new circuit. It begins with understanding what your existing electrical system can and cannot support.
Your Electrical System May Need Upgrading for EV Charging
This is where many homeowners are caught off guard. An EV charger is not like plugging in a new appliance. A 7-kilowatt charger drawing power continuously overnight is one of the largest sustained electrical loads a home will ever experience. For a significant portion of homes — particularly those built more than 20 or 30 years ago — the existing electrical infrastructure was simply not designed with this in mind.
There are several areas a licensed electrician will assess before installing an EV charger.
The switchboard is the starting point. Older switchboards fitted with ceramic fuses or early-generation circuit breakers may not have the capacity to support a dedicated EV charging circuit safely. In many cases, the switchboard itself needs to be upgraded before any EV charger installation can proceed. A modern switchboard fitted with the appropriate circuit breakers and safety switches is a prerequisite, not an optional extra.
The metered supply — the connection between the electricity network and your home — also has a maximum capacity, measured in amperes. If your home is already running air conditioning, an electric hot water system, a pool pump, and general household loads, adding an EV charger to the mix needs to be assessed against what your total supply can handle. In some cases, a supply upgrade through your electricity distributor may be required.
The existing wiring throughout the home is another consideration. Homes with older wiring, including aluminium wiring which was used in some Australian homes built between the 1960s and 1980s, may have specific risks and limitations that need to be addressed. A licensed electrician can identify whether your wiring is suitable for the additional load or whether remediation work is required.
Finally, the dedicated circuit for the EV charger itself needs to be correctly sized, run in appropriate cable, and terminated correctly. This is not work for a DIY approach. Electrical work on EV charging installations must be carried out by a licensed electrician, and in South Australia the installation must comply with the relevant Australian Standards and the requirements of your network distributor.
The Risk Nobody Talks About: Arc Faults
Most people understand the basics of electrical safety — don’t overload circuits, don’t use damaged cables, make sure safety switches are installed. But there is one risk associated with EV charging that is less commonly discussed, and it is worth understanding: arc faults.
An arc fault occurs when electrical current discharges across a gap — through damaged insulation, a loose connection, a pinched cable, or degraded wiring. The discharge produces intense heat and can ignite surrounding materials. Unlike a standard overload, which a circuit breaker is designed to detect and interrupt, many arc faults do not draw enough current to trip a standard breaker. They can persist undetected, building heat in a wall cavity or inside a charging cable, long before a visible problem appears.
The reason EV charging raises the risk profile for arc faults is straightforward: sustained, high-current loads over many hours create the conditions where connection integrity matters most. A loose terminal at the charger unit, a damaged cable that flexes regularly, or degraded insulation on an ageing circuit are all more likely to cause problems under prolonged load than they are during the brief, intermittent use of a standard appliance.
This is where Arc Fault Detection Devices — AFDDs — become a genuinely worthwhile investment.
Why AFDDs Are Worth Considering for EV Charger Installations
An AFDD is a protective device installed in the switchboard alongside the circuit breaker for your EV charger. Unlike a standard breaker, which responds only to overcurrent, an AFDD continuously monitors the electrical waveform on the circuit and is designed to detect the characteristic signature of an arc fault. When it detects one, it interrupts the circuit before the fault can develop into a fire.
AFDDs are already mandated in new residential installations in several European countries and are increasingly being adopted in Australia as awareness of arc fault risks grows. They are not yet universally required under Australian Standards for all residential applications, but for high-load circuits — and an EV charger is one of the highest sustained residential loads that exists — they represent a sensible, proactive layer of protection.
Consider the context. Your EV charger is most likely running at full capacity between 10pm and 6am. The household is asleep. No one is in the garage to notice a burning smell or see a glow behind the wall. The combination of sustained current draw, overnight operation, and the fact that most home fires start when occupants are asleep is precisely why adding an AFDD to an EV charger circuit is not overcautious — it is practical.
The cost of an AFDD is modest relative to the overall investment in an EV charger installation. The protection it provides — and the peace of mind that comes with it — makes it a worthwhile addition for any homeowner on the Fleurieu Peninsula making the move to home EV charging.
If you want to charge your electric vehicle at home, you need to organise for installation of a dedicated EV charging outlet. Get your whole electrical system assessed first, before trying to charge your vehicle. A dedicated charging outlet will mean you can charge more quickly, and the charge will last longer than if done through a regular outlet.
Getting the EV Charging Installation Right From the Start
The conversation around EV charging at home often focuses on which charger to buy. The more important question is whether your home is ready for it — and if not, what needs to happen before installation can safely proceed.
BCS Electrical installs EV chargers for homeowners across Victor Harbor, Goolwa, Port Elliot, Encounter Bay, Middleton, Yankalilla, Normanville, Strathalbyn, Mount Compass, and Hindmarsh Island. Before any charger is fitted, we assess your existing switchboard and electrical system, advise on any upgrades required, and discuss protective devices including AFDDs so you can make an informed decision about your installation.
An EV charger is a long-term asset. Getting the infrastructure right from the beginning means it is safe, reliable, and ready to perform for the years ahead.
Contact us at BCS Electrical today on 8554 3094 or via our CONTACT FORM to arrange an assessment and quote for your home EV charger installation.