How Much is a Heat Pump Hot Water System in Australia ？

In Australia, heat pump hot water systems typically cost between $2,500 and $5,500+, depending mainly on the tank capacity, product model, installation complexity, the state you live in, and any available subsidies. The cost is usually lower if you are replacing an existing system in situ; however, quotes may be higher if pipework needs to be altered, additional electrical circuits are required, the equipment needs to be relocated, or you are switching from gas to an all-electric system.

The installation cost of a heat pump hot water system is generally higher than that of a conventional electric storage water heater, but it is more energy-efficient in the long run. The Australian Department of Energy has also pointed out that the electricity consumption of a heat pump water heater can be as low as approximately 30 per cent of that of a traditional electric hot water system. If your home already has solar panels installed, or if you use a significant amount of electricity during the day, a heat pump can utilise more of the solar energy generated to heat water; it is also worth considering for households planning to reduce their gas consumption.

What is included in the price of a heat pump hot water system?

When reviewing quotes for heat pump hot water systems, do not simply compare the cost of the equipment itself. Different installation conditions can result in significant variations in the final price, so it is best to confirm whether the quote already includes installation-related items.

For example, does the quote for an old water heater include its removal and disposal? Can the existing pipework and electrical wiring be reused? Will additional valves, mixing valves or condensate drainage be required? Will there be extra charges for transporting the equipment, hoisting it into place or for any difficulties in getting it onto the site? If the quote includes STC or other subsidies, you should also clarify whether the discount has already been deducted or whether you will need to apply for it yourself after installation.

When providing a quotation for a heat pump hot water system, PowerBay endeavours to clearly outline the cost range rather than simply quoting a price for the equipment alone. We typically include the following items in our quotations to help you assess the final installation cost:

• The model, capacity and configuration of the heat pump unit and storage tank
• Whether the removal and disposal of the old hot water system is included
• Basic pipework connections, valves and safety fittings
• Electrical connections or any circuit modifications that may be required
• Installation details such as condensate drainage and mixing valves
• Transport, handling or special site access charges
• How STC discounts or relevant subsidies are calculated
• Installation labour, product warranty and after-sales liability

Typical price ranges for heat pump hot water systems in Australia in 2026 that you need to know

If you simply wish to get a rough idea of the budget, you can consider Australian heat pump hot water systems in terms of a few common scenarios.

Several Australian market price guides place the typical supply and installation costs of heat pump systems in the range of approximately $2,500–$5,500.However, the actual costs will still be influenced by a variety of factors.

A relatively straightforward in-situ replacement typically involves the old water heater being in a suitable location, with plumbing and power supply already close at hand and readily available. The budget for this type of installation is generally lower, with a common reference range of approximately $2,500–$3,500.

For a standard household upgrade—such as switching to a heat pump hot water system with a storage tank, including standard installation—the budget usually falls within the $3,500–$5,500 range. This is also a useful reference range for many households when making initial comparisons.

However, if the installation location requires adjustment, pipework distances are longer, the electrical circuit needs upgrading, or you opt for a unit with greater capacity, better low-temperature performance or improved noise control, the final price may exceed $5,500.

Therefore, whilst $2,500–$5,500 can serve as a preliminary budget range, it should not be taken in place of a formal quotation.

What truly influences the price is often not just the cost of the equipment itself, but the location of your home’s existing hot water system, the number of people using the water, the electrical conditions, the complexity of the installation, and whether you are eligible for STC or state government subsidies.

You might ask why there is such a big difference in the quotes from different households

When it comes to installing a heat pump hot water system, some households incur very low costs, whilst others face significantly higher expenses. Often, the difference lies not merely in the brand or capacity, but in the existing hot water systems, installation locations and water usage habits of the different households.

1.How much hot water does your household actually need each day?

When choosing the capacity of a water tank, one should not base the decision solely on ‘how many people live in the household’. A household of two might still have consecutive daily showers, use the bath and do frequent loads of washing; conversely, a family of four might not have such extreme demands if their water usage is spread out over the day.

If the water tank is too small, it may not be sufficient during the morning and evening rush hours; if the water tank is too large, both the equipment costs and the electricity consumption during operation will be higher.

So why not take a moment to consider the following issues that we might overlook in our daily lives?

For example, how many people in your household usually take showers one after the other? Is hot water usage mainly concentrated in the morning and evening, or is it spread out throughout the day?…

2. What sort of hot water system are you currently using?

If you are simply replacing your old electric storage water heater with a heat pump in the same location, the installation is usually straightforward. This is because the existing location, pipework and some of the electrical requirements may already be largely in place.

However, if you currently use a gas water heater, the situation may be slightly more complicated. Converting from gas to electric may involve disconnecting the gas supply, adjusting the pipework, checking the circuit capacity, and re-planning the placement of the heat pump unit and the water tank.

It is therefore best to inform the installer in advance whether you currently use an electric, gas or solar water heater; where the equipment is likely to be installed; and whether you wish to keep it in its original position. This will ensure that the quote provided is more in line with the actual circumstances.

3. Is your home suitable for a heat pump?

A heat pump hot water system cannot simply be installed in any available space. It works by absorbing heat from the surrounding air and transferring it to the water tank. Consequently, factors such as ventilation at the installation site, ambient temperature, noise levels and drainage conditions will all affect the system’s operational efficiency and installation costs.

When a heat pump is running, it produces a noise similar to that of an air-conditioning outdoor unit, and not all models are suitable for regions where temperatures frequently drop below 5°C in winter. This is why the user experience may vary even when the same unit is installed in different homes.

So please make sure to check these points in particular：

• Is the unit too close to windows in bedrooms, living rooms or neighbours’ homes?​
• Are the local minimum winter temperatures below the operating range specified for the product?​
• How will the condensation produced during operation be drained away?​
• Are additional base plates, brackets, pipe extensions or noise-reduction measures required?​
• Does the unit support timed operation, making it convenient to schedule heating during the daytime when solar power is available?​
• Is there sufficient ventilation at the installation site to ensure the heat pump can draw in enough air?

These details may not appear to be part of the ‘equipment price’, but they will have a direct impact on the final installation plan.

What rebates are available for heat pump hot water systems in Australia?

Before installing a heat pump hot water system, be sure to familiarise yourself with the incentives available from the federal and state governments. Some eligible systems may qualify for STCs under the Australian Government’s Small-scale Renewable Energy Scheme (SRES). However, eligibility depends on the product model, installation location, system capacity and installation method.

In addition to STCs at the federal level, different states may offer additional subsidies or discounts. For example, eligible households in Victoria can look into the Solar Victoria hot water rebates; households in certain postcodes in New South Wales can find out about available incentives through the government’s Heat Pump Water Heater Discount Scheme.

If you would like to find out more about the subsidies and STC discounts available in different states, as well as what to bear in mind when applying, please take a look at PowerBay’s guide to Australian heat pump hot water system rebates.

Before You Get a Quote

In Australia, you should generally budget between $2,500 and $5,500+ for the full installation of a heat pump hot water system, although the final price will depend on the tank capacity, installation location, the condition of the property, the product model and any available subsidies.

When comparing quotes, do not focus solely on the ‘post-subsidy price’ or the cost of the equipment itself. It is more important to check whether the quote includes the removal of the old unit, installation, electrical modifications, pipework connections, subsidy discounts, warranty and after-sales support.

If you are in Australia and are considering replacing an old electric or gas water heater, please visit PowerBay to explore product solutions suitable for your home, and then confirm the specific equipment and installation costs required for your property with a qualified installer.

FAQs

What is a reasonable price for the installation of a heat pump hot water system?

Quotes for simple in-situ replacements are usually lower; prices increase significantly when the project involves converting from gas to electricity, relocating equipment, altering pipework or upgrading electrical circuits. You should compare written quotes for systems of the same capacity, with the same scope of installation and under the same subsidy conditions.

Are there always subsidies available for heat pump hot water systems?

Not necessarily. STC and state-level support schemes usually have eligibility criteria relating to the product, installer, postcode, property type and timing. You should confirm your specific eligibility before signing a contract.

Are heat pump hot water systems noisy?

When the compressor is running, it produces a sound similar to that of an air-conditioning outdoor unit. When choosing a location, you should take into account bedrooms, neighbours and night-time operation.

If I have solar panels, is a heat pump hot water system a better option?

It is generally worth comparing. If the system can heat water during periods when solar power is being generated, it may make better use of the electricity generated during the day; however, you should still take into account your household’s hot water requirements and your electricity tariff plan.

Are heat pump hot water systems suitable for cold regions?

It depends on the specific product. You should check the minimum operating temperature in the technical data sheet and compare it with the lowest winter temperatures in your area.