EV Charger Cost: The Switchboard Upgrade Most Quotes Leave Out

A home EV charger installation typically costs $1,950 – $3,250, averaging $2,500 once a sparky has run a dedicated circuit from the switchboard to the garage or carport. What that quote usually doesn't include is what happens if your switchboard can't safely take the extra load — and on older homes, that's common enough that we treat it as a separate line item, not a footnote.

Why the switchboard matters

An EV charger is one of the biggest single loads most Australian homes will ever put on their wiring — a 7 kW charger draws roughly as much continuous current as running every element of an oven at once, for hours at a time, every night. Before a licensed electrician connects it, they have to check three things on your existing board:

• Capacity. Does the main switch and the incoming supply have headroom for another 32-amp circuit on top of everything else already running?
• Protection. Does the circuit need its own RCBO (a combined safety switch and circuit breaker), and is there a spare slot to fit one?
• Condition. Older boards with ceramic fuses, no main switch, or ageing busbars often fail this check outright and need replacing before any new circuit can be added.

If your board passes, the quote you were given is probably close to the final bill. If it doesn't, the electrician will usually come back with a second number.

What the switchboard upgrade adds

A full switchboard replacement — ripping out the old board and fitting a new one with individual RCBOs for every circuit — typically runs to $11,000 on its own, on top of the charger itself. That's a meaningful jump on a job you may have budgeted at under $3,000, which is why it's worth asking about before work starts rather than after the electrician has already opened the meter box.

A few things push a home toward needing the full upgrade rather than a smaller fix:

• Houses built or last rewired before the 1990s, where the board was never designed for continuous high-draw circuits like EV charging.
• Boards already close to full, with no spare slots for the new RCBO — common in homes that have added air conditioning, solar, or a heat pump hot water system over the years without upgrading the board each time.
• Single-phase supply feeding a lot of other high-draw equipment, where the combined load (charger plus existing appliances) pushes close to the main switch rating. Some homes in this position are better served by upgrading to three-phase supply instead, which is a question for your electrician and distributor, not a DIY call.
• Strata or embedded-network apartments, where the charger has to go through a shared board and body corporate approval, adding time rather than cost but worth factoring into your timeline.

Not every older board needs full replacement — sometimes adding a single RCBO and confirming the main switch rating is enough, which is a smaller job than a full board swap. The only way to know which situation you're in is to have an electrician actually look at the board, not guess from its age.

How we'd approach the quote

Because this is the kind of extra cost that's easy for a quote to understate, we'd treat any EV charger quote that doesn't mention the switchboard at all with some caution. A reasonable quote should say explicitly whether the existing board was inspected and whether it passed, not just quote the charger and circuit run as if the board is a given. If you're not sure whether a number you've been given is reasonable for your situation, our "is my quote fair" tool is built for exactly this — it checks a quote against labour hours and local rates rather than a flat average.

It's also worth asking the electrician for the switchboard cost as a separate, itemised figure rather than bundled into the charger price. That way, if you decide to defer the board upgrade, you can still see what the charger installation alone would cost — and if you're planning solar or a battery in the next few years, it's worth asking whether a switchboard upgrade now sized for that future load would avoid paying an electrician to open the board twice.

The bottom line

Budget $1,950 – $3,250 for the charger itself, and ask upfront whether your switchboard will need work — if it does, that's realistically another few thousand dollars, most of it going toward a new switchboard with RCBOs. All electrical work like this has to be done by a licensed electrician in every state, so there's no shortcut around the inspection step; the only lever you control is finding out the full number before the van turns up.

See our full EV charger for charger-only pricing, and House rewiring if your board or home wiring more broadly needs attention. If solar is also on your list, Solar panels is worth reading before you decide how big a board upgrade to pay for now.