Switchboard Upgrade for EV Charger Adelaide

Three things point to an upgrade: no free space on the board, no safety switches on the circuits, or a main supply already close to its limit. Any one of them can stand in the way of a safe charger circuit.

A fast home charger runs for hours at a steady, high draw. An old board built for lighting and a few appliances can still struggle once a car sits on it all night.

If your board is modern, has space and has safety switches on each circuit, you may need no upgrade at all. The electrician confirms that by looking, not by guessing from the age of the house.

The board, the supply and your household load decide the answer between them. The board comes down to its age, its space and what protects each circuit. The supply is the connection coming into the house, which may be a modest single-phase one. The load is what your home already draws at its busiest.

That last number decides whether a dedicated charger circuit fits alongside everything else. If the numbers don't fit, there are two answers: upgrade the board and supply, or set the charger to draw less.

Ceramic fuse boards usually have no safety switches and little spare room, so they often need replacing before a charger can be added. Level 2 charging is the faster kind used for home chargers, and it holds a steady draw for hours, which is hard on a tired board.

In an older home, the wiring behind the board gets looked at too. Where the board is replaced, it brings in modern breakers, safety switches and space for the charger circuit.

An RCBO combines a circuit breaker and a safety switch on a single circuit. If a fault happens at the charger or its cable, only the charger circuit trips and the rest of the house stays on.

The breaker side cuts the power when the circuit is overloaded. The safety switch side cuts it quickly when current leaks where it shouldn't, which lowers the risk of a serious shock.

Load management keeps the charger from asking for more power than the house can spare. When the house is busy, the charger eases back. When demand drops, it picks up again.

This is also how a charger gets along with solar and a battery. Charging can be steered toward the middle of the day when the panels are producing.

Since 1 July 2024, most home wall chargers in South Australia are installed to the Technical Regulator's charger guideline, which covers how the charger responds to signals from the grid. The electrician only connects remote control with your agreement.

Where the job allows, the electrician can do the board upgrade and the charger in the same booking. The board is replaced, the cable is run and the charger is fitted in a single job, so you don't live with a half-finished setup.

When the board sits on the far side of the garage or house, the cable route is planned so it stays neat and protected. A charger you have already bought may be fitted, provided it suits your supply and its brand and model are registered with SA's Technical Regulator. The electrician checks both before quoting.

The price depends on how much of the board has to change. A new circuit and RCBO in a modern board costs far less than replacing a whole older board.

The cable length from board to charger, whether the supply itself needs upgrading and whether three-phase power is in play also move the figure.

You get a written quote that includes any board work before the job starts. The same board questions apply to homes in North Adelaide, Kent Town, Wayville and beyond.

Not sure your board can take a charger? Request an Install Quote and type in what kind of board you have, roughly how old the house is and the charger you have in mind, so the board work and the charger can be priced together.