What to understand about your switchboard and an EV charger
Not every Melbourne home needs a new switchboard for an EV charger. The charger needs its own circuit, enough spare capacity and RCD protection. Older homes with ceramic fuses or a crowded board can fall short, but a load assessment shows whether an upgrade, a smaller fix or load management will do.
Will a charger overload an older board?
A home charger draws a steady load for hours, on top of heating, cooking and hot water. On a board with rewireable fuses or no spare room, that extra demand is the real worry. The answer depends on the supply coming in and what else runs at once, not on the age of the house alone.
How a switchboard load assessment works
A licensed electrician looks at the incoming supply, the main switch rating, existing circuits and the biggest appliances in the home, then compares them with the charger's draw. That shows whether a dedicated circuit fits as is, whether the board needs new protection devices, or whether charging demand needs managing.
Switchboard upgrade and load management compared
An upgrade replaces old fuses and a cramped enclosure with a modern board, circuit breakers, RCD protection and room for the charger circuit. Load management instead watches household use and slows charging when the home draws heavily, so the charger shares the supply without exceeding it. Some homes end up needing both.
Why the decision is not always a full upgrade
If the board is in sound condition with spare room but the supply is tight, load management may avoid replacing it. If the board still has ceramic fuses, lacks RCD protection or has no space left, an upgrade is usually the safer path. Ask for both options to be explained before committing.
Certificates for switchboard and charger work
After a board upgrade, ask for your copy of the Certificate of Electrical Safety from whoever did the work. If the job is prescribed work, an independent Licensed Electrical Inspector must also check the new board before it is connected or left energised. A purely electrical job like this does not need a major domestic building contract.
Next step for an older switchboard
Open the switchboard door and check whether you see ceramic fuses or switches, and whether any spaces are free. Note the charger model and its kW rating, and where the car parks. Request a quote here when the board's condition is clear, and a licensed and insured local contractor can follow up.
What ev switchboard upgrade can cover
Load assessment
Compares your supply, main switch and household loads with the charger's draw to show what work, if any, is needed.
Full switchboard upgrade
Replaces ceramic fuses or a full enclosure with a modern board that has circuit breakers, RCD protection and room for the charger.
Protection upgrade on an existing board
Adds a dedicated charger circuit with its own RCD protection where the board is sound and has spare space.
Load management
Fits a device that reduces charging speed when the home draws heavily, so the charger stays within the available supply.
