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A single surge can quietly kill a TV, a heat pump board or your home network. In a coastal, storm-exposed spot like Whakatāne, whole-house surge protection at the switchboard is cheap insurance for everything plugged in.
Published 2026-06-02 · Whakatāne Electricians
A surge is a brief spike in voltage well above the normal 230V. The dramatic ones come from lightning — a strike doesn't have to hit your house; a nearby strike on the network can push a spike down the lines. But most surges are smaller and more frequent: grid switching by the lines company, faults clearing, and big appliances (pumps, motors, even a fridge compressor) switching off. Storms rolling into the Eastern Bay bring both lightning risk and grid disturbance, so Whakatāne homes see their share.
A whole-house surge protective device (SPD) is installed inside your switchboard by an electrician. It clamps incoming surges at the point power enters the home, protecting every circuit — including the things you can't put on a power board, like your heat pump, oven, hot water and hard-wired smoke alarms. A plug-in surge board only protects whatever's plugged into that one board, and cheap ones wear out silently after absorbing a few hits. The two work well together: the switchboard SPD takes the big hit, and a quality plug-in board adds a second layer for sensitive gear like a TV or computer.
Adding an SPD usually means there's space (and modern RCD protection) in the board, so it pairs naturally with a switchboard upgrade. As a guide, supplying and fitting a whole-house SPD runs roughly $300–$700 in NZ in 2026 when there's room on an existing modern board; more if the board needs work first. Weigh that against replacing a heat pump controller, a smart TV and a laptop after one storm — for a home full of electronics in a lightning-prone coastal area, it's an easy call.
FAQ
No device fully stops a direct strike, but an SPD greatly reduces the far more common surges — nearby strikes, grid switching and appliance spikes — that quietly damage electronics over time.
They're a useful second layer for sensitive gear like TVs and computers, but they only protect what's plugged into them. A switchboard SPD protects the whole house, including hard-wired appliances.
Often yes, if your board is modern and has spare space. On older Whakatāne boards we usually fit it alongside a switchboard upgrade so everything is properly protected.
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