Signs You Need a Switchboard Upgrade & What Affects the Cost
Old boards don't usually fail overnight — they show signs first. Here's what to look for, and the real factors that move an upgrade's cost up or down.
How to tell your switchboard is overdue
Most switchboards don't fail all at once — they show smaller signs first. If more than one of these applies, it's worth getting it looked at.
- Ceramic fuses instead of circuit breakers — you're replacing a fuse wire rather than flicking a switch back on
- No safety switch (RCD) at all, or only one covering the whole house
- Breakers or the safety switch tripping regularly, especially when running two appliances at once
- Planning to add an EV charger, ducted air conditioning, or a pool/spa and unsure if the board has capacity
- Visible scorch marks, a burning smell near the board, or a buzzing sound
- An insurer or building inspector has flagged the board during a claim or pre-purchase inspection
What actually drives the cost
There's no single "switchboard upgrade price" — every board is different. These are the main things that move the number up or down.
Fuses vs partial upgrade vs full replacement
A straight swap from old ceramic fuses to modern circuit breakers is a smaller job than a full board replacement, which usually happens when the whole enclosure, meter panel, or main switch also needs replacing.
Number of circuits
More circuits means more breakers and more labour to terminate and test each one. Homes that have had additions, granny flats, or sheds wired in over the years often end up with more circuits than the original build.
Safety switch coverage
Fitting RCD protection across every circuit (as current AS/NZS 3000 wiring rules require for new and altered circuits) costs more than a single whole-board safety switch, but is safer — a fault on one circuit won't cut power to the whole house.
Capacity for future loads
If an EV charger, ducted air conditioning, or solar/battery is on the cards, sizing the board and main switch for that now is cheaper than upgrading twice.
Meter and supply authority involvement
Some upgrades need the meter panel touched or a supply authority (Endeavour Energy in this area) isolation booked, which adds coordination time on top of the electrical work itself.
Access and location
A board that's easy to access in a garage costs less to work on than one buried in a tight meter box or requiring scaffolding to reach.
Get your switchboard assessed
Send a photo of your existing board through the quote form, or we'll take a look on-site — either way you'll get a proper number, not a guess.
Frequently asked questions
How do I know if I have ceramic fuses or circuit breakers?
Ceramic fuses look like small round porcelain plugs with a visible fuse wire behind glass or mica — if you've ever had to replace a "fuse wire" rather than flick a switch back on, you've got fuses. Circuit breakers are rectangular switches you flick up to reset.
Do I need to upgrade my switchboard before installing an EV charger?
Not always, but the board needs enough spare capacity and a correctly rated circuit for the charger — we check this as part of every EV charger installation quote.
How long does a switchboard upgrade take?
A straightforward upgrade is usually done in a day, including the supply authority isolation. Larger boards with more circuits or meter panel work can take longer — we'll give you a timeframe with the quote.