Heat Pump Hot Water Rebate WA
Upgrading to a heat pump hot water system is one of the smartest investments a Western Australian homeowner can make — but the upfront cost can give some people pause. What many homeowners don't realise is that government rebates and incentives can significantly reduce what you actually pay on installation day.
If you're researching the heat pump hot water rebate in WA, you've come to the right place. In this guide, PlumbWest Services — your local Peel region plumbing specialists — breaks down exactly what rebates are available in Western Australia in 2026, who qualifies, how much you can save, and how the process works from start to finish.
The short version: most WA homeowners replacing an old electric storage system with a heat pump can save between $1,500 and $2,500 on their installation cost before paying a single dollar in running costs. Here's how.
What Rebates Are Available for Heat Pump Hot Water Systems in WA?
Understanding the rebate landscape in WA requires knowing the difference between federal and state-level incentives — because the two operate very differently.
The Western Australian Government's Solar Hot Water Heater Subsidy Scheme, which previously provided a direct state rebate of up to $1,000 for eligible heat pump and solar hot water installations, has now closed. As of late 2025, there is no active state government rebate program specifically for residential hot water system replacements in WA.
However, the primary financial incentive for WA homeowners — and the one that delivers the most significant savings — is the federal Small-scale Renewable Energy Scheme (SRES), administered by the Australian Government through the Clean Energy Regulator. This scheme is still very much active and available to eligible WA homeowners right now.
On top of federal STCs, many authorised installers and retailers also apply an additional upfront retailer discount at the point of sale when you replace an old electric storage system with a heat pump. When the federal STC rebate and retailer incentives are stacked together, total savings for most WA households commonly reach $2,000 to $2,500 on the installed cost of a new heat pump system.
How the Federal STC Rebate Works in WA
The Small-scale Technology Certificates (STC) scheme is the cornerstone of hot water rebates across Australia, including Western Australia. Here's how it works in plain language.
When you install an eligible heat pump hot water system, a set number of STCs are generated based on the system's energy efficiency, its capacity, and the climate zone where it's installed. Each STC represents one megawatt-hour of electricity that the new system is expected to save over its lifetime compared to a conventional electric storage system.
STCs have a market value — approximately $35–$40 per certificate as of 2026, though this fluctuates slightly. The total rebate value depends on how many STCs your specific system generates. For a typical residential heat pump installation in the Peel region and surrounding WA areas, the STC rebate is generally worth between $1,500 and $1,800, depending on the system size and brand.
The good news is that you don't need to manage any of this yourself. In practice, the process works as follows:
You assign the right to create your STCs to your installer at the point of sale. Your installer handles all the paperwork and claims the certificates on your behalf. The value of those certificates is then applied as an upfront discount on your invoice — so you see the savings immediately, rather than waiting for a reimbursement cheque. There are no forms to fill in, no portal to navigate, and no waiting period. The rebate is simply taken off the price on the day.
This is one of the most straightforward government incentives available to Australian homeowners, and it's one of the key reasons why the net cost of a heat pump system is much more competitive than the sticker price suggests.
How Much Can You Actually Save? A Real-World Example
To make this concrete, here's how the rebate stacks up on a typical residential installation in the Peel region in 2026.
Say a Dawesville homeowner is replacing a 10-year-old electric storage system with a quality 270-litre heat pump from a reputable brand like Rheem, iStore, or Enviroheat. The full supply and install price for that system might be quoted at approximately $4,500.
After the applicable STC rebate — let's estimate $1,600 in this example based on current certificate values and the system's zone rating — the net cost drops to around $2,900. If the installer also applies an additional retailer incentive for switching from electric storage, that could bring the final out-of-pocket cost down to approximately $2,300–$2,500.
From that point, the ongoing running cost savings begin. A household switching from a standard electric storage system to a heat pump typically saves $400–$700 per year on their energy bills. At $500 per year in savings, the additional cost of choosing a heat pump over a basic electric replacement pays for itself within two to three years — after which those savings continue for the remaining 15+ year lifespan of the system.
Who Is Eligible for the Heat Pump Hot Water Rebate in WA?
Eligibility for the STC rebate is relatively straightforward, but there are a few conditions to be aware of.
You must be replacing an existing hot water system. The STC scheme applies to residential replacements and new installations of eligible heat pump systems. Switching from an old electric storage system delivers the highest STC value because the energy savings compared to the replaced system are greatest.
The system must appear on the Clean Energy Regulator's approved products list. Not every heat pump on the market is STC-eligible. Quality brands such as Rheem, iStore, Enviroheat, Reclaim, and Sanden all have models listed, which is one reason we recommend choosing from reputable manufacturers. Your installer should confirm eligibility for the specific model before quoting.
The system capacity must be 425 litres or under for air source heat pump systems to qualify under the scheme. For the vast majority of residential installations, this is not a limiting factor — standard residential systems range from 170 to 315 litres.
The installation must be carried out by a licensed plumber — in WA, this means a plumber holding a current licence issued under the Plumbers Licensing Act 1995. Only installations completed by properly licensed tradespeople are eligible for the STC rebate. Working with unlicensed installers not only risks your rebate but also creates compliance issues with WA plumbing regulations.
You must own the property where the system is being installed. Renters cannot independently claim the rebate, though a property owner or landlord can apply for the installation on a rental property they own.
Maximising Your Rebate: Tips for WA Homeowners
Getting the most out of available incentives comes down to a few practical decisions.
Choose an eligible, high-quality system. Systems with higher energy efficiency ratings generate more STCs and therefore deliver a larger rebate. It's worth comparing models and asking your installer to confirm the number of STCs the specific unit will generate at your postcode before you commit. A slightly more expensive system with a higher STC value may end up costing you less after the rebate than a cheaper model with fewer certificates.
Assign your STCs to your installer. Most homeowners do this as a matter of course, but it's worth confirming upfront. When you assign your STCs to a registered agent — typically your installer — the discount is applied directly to your invoice. If you try to manage the STC process yourself, the discount doesn't happen at the point of sale and you'd need to sell the certificates independently, which adds complexity and delay.
Act sooner rather than later. The STC scheme is a finite government program and its value decreases over time as Australia moves closer to its 2030 renewable energy targets. The number of STCs a system is eligible for is also subject to a deeming period that reduces annually. Installing now locks in the current rebate value rather than a reduced future amount.
Don't choose a system based on rebate value alone. The STC rebate is a meaningful saving, but the system's long-term running cost, warranty length, and reliability matter more over a 15-year ownership period. At PlumbWest Services, we recommend brands and models based on the full picture — upfront cost after rebates, annual running costs, warranty terms, and suitability for your household's hot water demand.
What Happens If the Old System Has Already Failed?
One of the most common questions we hear is: "Can I still claim the rebate if my hot water system has already broken down and I need to replace it urgently?"
The answer is yes — rebate eligibility is based on the new system being installed, not on the condition or timing of the old one. Whether you've had time to plan your upgrade or you've woken up to a failed system and need an emergency replacement, the STC rebate process is the same. Your installer assigns the STCs at the point of sale regardless of whether the job is planned or urgent.
The key is to ensure you choose an eligible system from an approved product list and that the installation is carried out by a licensed plumber who can process the STC assignment correctly. At PlumbWest Services, we handle this as standard practice for every heat pump installation — so whether your upgrade is planned or unexpected, your rebate is taken care of.
Why Choose PlumbWest Services for Your Heat Pump Installation?
PlumbWest Services is a local Dawesville-based plumbing business specialising in heat pump hot water system installations across the Peel region, including Dawesville, Lake Clifton, Herron, Bouvard, Falcon, and surrounding areas.
We have specific expertise in heat pump technology and understand the rebate process thoroughly. When you book a heat pump installation with us, we handle the STC assignment paperwork on your behalf, apply all applicable discounts directly to your quote, and recommend only systems from quality brands that appear on the Clean Energy Regulator's approved products list.
You won't be dealing with a call centre or a salesperson from interstate. You'll be talking to a local, licensed plumber who knows your area, understands the specific conditions of Peel region properties — coastal salt air, bore water supply, warm climate — and will give you honest advice on the best system for your home and household size.
Ready to find out exactly how much you could save on a heat pump hot water system? Contact PlumbWest Services today for a free, no-obligation quote that includes your applicable STC rebate.
FAQ: Heat Pump Hot Water Rebate WA
Is there still a state government rebate for heat pump hot water systems in WA?
The WA Government's Solar Hot Water Heater Subsidy Scheme has closed. However, the federal Small-scale Technology Certificates (STC) scheme remains active and provides WA homeowners with an upfront discount of approximately $1,500–$1,800 on eligible heat pump installations, depending on the system and location. Some retailers also offer additional incentives, bringing total savings to $2,000–$2,500 for many households.
How is the STC rebate applied — do I need to claim it myself?
No. When you work with a licensed installer, you simply assign your STC entitlements to them at the point of sale. They handle all the paperwork and apply the rebate value as a direct discount on your invoice. You never see the full price — just the reduced cost after the rebate.
How much is the heat pump hot water STC rebate worth in WA in 2026?
For a typical 270-litre residential heat pump installation in the Peel region, the STC rebate is generally worth approximately $1,500–$1,800 after certificate values are applied. The exact amount depends on the specific system, its energy efficiency rating, and the current STC market price. Your installer can confirm the rebate value for your chosen system before you commit.
Does the rebate apply to rental properties in WA?
Yes, property owners and landlords can access the STC rebate for eligible heat pump installations on rental properties they own. The rebate is tied to the property owner, not the occupant.
Will the STC rebate value decrease over time?
Yes. The number of STCs a system generates is subject to an annual deeming period that reduces as Australia approaches its 2030 renewable energy target. Installing sooner locks in the current rebate value. Waiting may result in a lower incentive amount.
Want to find out exactly how much you can save on a heat pump hot water system in WA? Get a free quote from PlumbWest Services — we'll include your full STC rebate calculation and take care of all the paperwork.
