Who needs a board upgrade for an EV charger
Not every Adelaide home needs a new switchboard to charge an electric car. It depends on three things: spare capacity on the supply, free space on the board for a dedicated charger circuit, and whether the board still runs old fuses. A home with ceramic fuses or a full rail is the most likely to need work.
How charger load adds up on your board
A home charger draws a heavy current for hours at a time, often overnight. On top of air conditioning, an induction cooktop or electric hot water, that extra load can push older circuits into tripping or overloading. The board also needs room for the charger's own circuit breaker and protection.
Load management as an alternative
Some chargers can sense how much power the house is already using and slow charging when demand peaks. If spare capacity is the only problem, this can let an existing board cope without a full upgrade. It won't fix a board with old fuses, no free space or worn wiring.
Single or three phase: a decision about your supply
For many drivers, overnight charging on single phase is enough. Three phase supply can charge faster, but only if both the car and the charger can use it, so check your vehicle's onboard charger specification first. Changing the supply also involves SA Power Networks as well as the board work.
Why checking the board before buying the charger matters
Buying a charger first can leave you with hardware your board or supply can't run at full speed. When you know the board's capacity first, you can choose the charger size, whether load management is worth it and whether any upgrade is needed, all before spending money on equipment.
Your next step for home EV charging
Write down your vehicle model, the charger you're considering and your usual weekly kilometres. Then open the meter box, note whether it has fuses or breakers and read the main switch rating if it's labelled. With those details sorted, you can request a quote here and a licensed and insured local contractor can follow up on the charger circuit.
EV Charger Switchboard Upgrade Services We Offer
✓Dedicated Charger Circuit
A separate circuit and breaker for the charger, added where the board already has the capacity and space.
✓Board Upgrade for Charging
Replacing an old or full board so it can take a charger alongside the rest of the household load.
✓Load Managed Charging Setup
Setting up a charger to slow down when household demand is high, which may avoid a bigger upgrade.
How it works
- 1
Confirm the vehicle and charger
Start with the car model and the charger you're considering, because they decide how much power charging will draw and whether three phase would make any difference.
- 2
Assess board and supply capacity
A licensed professional checks the main switch rating, the type of supply, free space on the rail and whether the board still has fuses.
- 3
Choose the simplest workable option
Depending on what the board shows, that could be a dedicated circuit, a load managed charger, a board upgrade or a change of supply.
- 4
Install and test
The board work and charger circuit are completed and tested, so the charger can run alongside the rest of the household load without overloading circuits.