Hot Water System in Perth: Heat Pump, Electric and the Electrical Side
Hot water system choices in Perth have changed fast, and with heat pump rebates on the table in 2026, more homeowners are rethinking the old electric tank in the corner. Choosing the right hot water system is part appliance decision and part electrical job, and getting the electrical side right is where a licensed electrician comes in. Here are the six things to know before you replace your hot water system.
Heat pump vs electric storage vs gas The main hot water system options in Perth are electric storage (cheapest to buy, most expensive to run), gas (where you have a connection), and heat pump (higher up-front cost, far lower running cost). A heat pump works like a reverse-cycle air conditioner, pulling warmth from the air to heat your water, and uses around 70% less electricity than an old electric storage tank.
What a hot water system costs in Perth As a 2026 guide, electric storage replacement runs from around $840 to $2,600 installed, while a heat pump hot water system is roughly $3,000 to $7,000 before rebates. The good news is the federal Small-scale Renewable Energy Scheme generates certificates that typically knock $800 to $1,800 off a heat pump, handled by your installer, with most Perth households recovering the difference within a few years.
The rebates worth knowing about Heat pump and solar hot water systems qualify for small-scale technology certificates under the federal scheme, applied as an up-front discount. The rebate value shifts with the certificate market and your system size, so confirm the current figure when you quote. The state’s Building and Energy and your installer can point you to what applies to your home.
The electrical side of a hot water system This is where an electrician is essential. A hot water system needs a correctly rated, dedicated circuit, and many Perth homes run their tank on a controlled-load (off-peak) tariff to cut costs. A heat pump in particular needs a dedicated circuit and a switchboard with spare capacity, and an older or asbestos meter board may need replacing first. We handle the electrical install and coordinate with a licensed plumber for the plumbing connections.
Off-peak and controlled load Running your hot water system on a controlled-load or off-peak tariff, or timing a heat pump to run midday on a time-of-use plan, can dramatically cut what it costs to heat your water. An electrician sets the circuit up correctly so you get the cheaper rate without ever sacrificing hot showers.
Why Perth’s hard water matters Perth’s hard water shortens tank life, with storage tanks here often lasting 8 to 12 years versus longer in soft-water cities, so a sacrificial anode check every couple of years pays off. Heat pumps, which have no heating element in the tank, are less affected, which is another point in their favour.
6 things to check before you replace
- Whether a heat pump’s running-cost savings suit your household
- If your switchboard and circuit can handle the new system
- Whether a controlled-load or off-peak tariff is set up
- The current rebate value for a heat pump
- That an old or asbestos meter board does not need replacing first
- Coordinating the electrician and plumber so it is a one-visit job
How long does a replacement take? Most straightforward swaps are completed in a single visit, with the electrical connection done while a plumber handles the water side. A change of system type, a new circuit or a switchboard upgrade adds time, but in most cases you have hot water back the same day. We confirm the scope and a fixed price before we start.
Replacing a hot water system in Perth?
Replacing a hot water system in Perth? ACS Electrical handles the electrical side, from dedicated circuits and controlled load to switchboard capacity, and coordinates the plumbing so it is done once, properly. Explore our switchboard upgrades service, electrical maintenance service or home battery installation guide.
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