The short answer
A surge is a brief spike well above the normal 240 volts, caused by lightning or by switching on the network and in your own equipment. A surge protection device (SPD) in the switchboard limits spikes coming in on the supply for the whole house; plug-in surge power boards add protection at a TV or computer. Response Electricians in Perth publishes $350 to $600 to install a switchboard SPD (checked 12 October 2026; GST not stated). Western Power lists lightning and storms as outside its control when it assesses damage claims, so protecting your own equipment is up to you.
What causes a power surge?
Australian homes are supplied at 240 volts. Hager, which makes switchboard equipment, describes a surge as a voltage rise well above that, and names two sources:
Lightning and storms
A strike nearby can induce a voltage that travels along the powerlines into a home's switchboard. Fallen lines can cause surges too. DFES says storms are most frequent in WA's south west from May to October, so autumn to spring is the main season around Busselton.
Switching
Equipment turning on and off releases energy stored in its motors and coils. Hager says these switching transients are a source of surges inside the home as well as on the network.
Hager lists the equipment most at risk: kitchen appliances, LED lighting, home electronics, security devices, EV chargers and solar inverters, all built around sensitive electronics. It says long overhead supply lines and rural locations can make a site more exposed.
Switchboard surge protection vs surge power boards
The two kinds work together rather than replacing each other. Synergy suggests surge protectors where a number of appliances are used at once, such as an entertainment unit or home office, and a switchboard SPD handles what comes in from outside before it reaches them.
Types of surge protection
| Type | Where it goes | What it covers |
|---|---|---|
| Switchboard SPD | In the switchboard, fitted by a licensed electrician | Surges coming in on the supply, for every circuit in the house |
| Surge power board | Plugged into a power point | Only what's plugged into it, such as a TV, computer or modem |
| Dedicated SPDs for solar or sensitive circuits | In the switchboard, as part of the installation | Extra protection for particular equipment |
From Hager's surge protection guide, Synergy's safety tips and Response Electricians' published prices, checked 12 October 2026. Hager recommends layering devices according to the risk at the site.
What surge protection doesn't do
- It doesn't protect people from electric shock. Queensland's Electrical Safety Office says circuit breakers and surge protectors protect appliances, not people. Only safety switches (RCDs) do that
- It reduces the risk of damage rather than removing it. Hager frames SPDs as reducing risk, not guaranteeing protection
- It wears out. Hager says its SPDs have a lifetime indicator that shows when the device is near the end of its life and needs replacing
So in a thunderstorm the old advice still applies: Queensland's Electrical Safety Office says to switch off and unplug electrical equipment when a storm approaches, and not to use a fixed-line phone. If you don't have safety switches on every circuit, that matters more than surge protection: see ceramic fuses and old fuse boxes.
Why you can't count on a claim
Western Power considers damage claims where the damage was caused by its own incorrect action or equipment. It lists lightning, storms, wind and windborne debris among the events outside its control, along with bushfires and vandalism. Claims generally have to be made within a year, with receipts, quotes, repair reports and photos.
That leaves storm damage to your own insurance, if your policy covers it. Check what yours says about power surges and motor burnout before storm season, and keep damaged items and a repair report if anything does fail.
What surge protection costs
Published surge protection prices
| Job | Published price | Who publishes it |
|---|---|---|
| Switchboard surge protection device, installed | $350 – $600 | Response Electricians, Perth |
| Whole-home protection with dedicated devices for solar and sensitive circuits | $600 – $1,200 | Response Electricians, Perth |
Prices as published, checked 12 October 2026. The page doesn't say whether GST is included. It was the only WA electrician we found publishing surge protection prices.
A switchboard SPD needs room on the board. On an old board with no space, it's usually fitted as part of a switchboard upgrade, which lists surge protection as an optional extra. When you compare upgrade quotes, ask whether it's included. The switchboard upgrade cost guide has published board prices.
Is it worth it for a Busselton home?
It's most worth considering if you have a solar inverter, a battery or an EV charger, a lot of home electronics, or a long overhead supply, and if you're already having switchboard work done. If you're adding solar, a battery or an EV charger, ask the installer about surge protection for that equipment at the same time.
Common questions
How much does surge protection cost to install?
Response Electricians in Perth publishes $350 to $600 for a switchboard surge protection device installed, and $600 to $1,200 for whole-home protection with dedicated devices for solar and sensitive circuits (checked 12 October 2026; GST not stated).
Does Western Power pay for appliances damaged by a power surge?
Only where the damage was caused by Western Power's own action or equipment. It lists lightning, storms, wind and windborne debris as outside its control. Claims generally need to be made within a year, with evidence.
Is a surge protector the same as a safety switch?
No. A safety switch (RCD) protects people from electric shock. A surge protector protects equipment from voltage spikes. Queensland's Electrical Safety Office says only safety switches save lives.
Do I still need surge power boards if I have switchboard protection?
They do different jobs. A switchboard device deals with surges coming in on the supply; a surge power board adds protection for what's plugged into it. Hager recommends layering protection according to the risk.
Do surge protectors wear out?
Yes. Hager says its switchboard devices have a lifetime indicator that shows when one is near the end of its life and needs replacing.
Where this information comes from
The prices, rules and advice on this page come from these published pages, checked on 12 October 2026.
- Hager: surge protection for storm season · Switchboard equipment manufacturer's guide to surge protection devices
- DFES: storm · WA fire and emergency service storm information
- Synergy: top 10 tips for electricity safety at home · WA household retailer's safety tips
- Electrical Safety Office Queensland: re-wiring fuses · Queensland electrical safety regulator
- Electrical Safety Office Queensland: electrical safety during storms · Queensland electrical safety regulator
- Western Power: customer damage claims · Network operator's rules for claiming damage after an outage or surge
- Response Electricians: surge protection Perth · Perth electrician, published surge protection prices
- Western Power: what we do · The network operator for the South West Interconnected System, Kalbarri to Albany and Kalgoorlie, which takes in Busselton
