Heat Pump Hot Water Cost Australia 2026: Price, Installation and Running Costs

A heat pump hot water system costs $2,500–$5,000 installed after STCs for most Australian homes. That is the short answer. The full range is wider — from around $2,500 for an entry-level model in a simple swap-out to $8,000 or more for a premium CO2 unit with a complex installation. Below is the complete breakdown: supply prices, installation costs, STC rebates, and how running costs compare against gas and electric storage over time.

Heat Pump Supply Prices in Australia

The table below covers the most commonly installed heat pump hot water systems in Australia in 2026. Supply prices are the cost of the unit alone, before installation. The “After STCs” column reflects a typical rebate of around $1,000, which varies by model, climate zone, and current STC prices.

Model	Capacity	COP	Supply Price	After STCs (~$1,000 off)	Notes
Ecogenica R215	215L	3.4	$2,200	~$1,200	Entry-level; compact footprint
Aquatech X6	225L	3.2	$2,295	~$1,295	Entry-level; widely available
iStore 270L	270L	3.6	$2,790	~$1,790	Popular entry/mid option; strong installer network
Emerald 270L	270L	3.8	$3,290	~$2,290	Mid-range; good warranty
Solahart Atmos Eco 280L	280L	3.9	$3,500	~$2,500	Mid-range; established brand
Rheem AmbiHeat 270L	270L	4.0	$3,629	~$2,629	Mid-range; wide service network
Evoheat 270-E	270L	4.5	$3,600	~$2,600	Mid/premium; high efficiency
Rinnai Enviroflo 250L	250L	4.3	$3,850	~$2,850	Premium; strong brand support
Reclaim 250 CO2	250L	4.7	$5,000	~$4,000	Premium CO2; best cold climate performance
Sanden 250 CO2	250L	4.8	$5,800	~$4,800	Premium CO2; market-leading COP

CO2 (R744) refrigerant models — Reclaim and Sanden — have higher upfront costs but perform better in cold climates and achieve the highest COPs of any heat pump hot water system available in Australia.

For a full comparison of models across price, capacity, and performance, see the heat pump hot water systems comparison page.

Installation Costs

The supply price is only part of what you will pay. Installation adds $600–$1,500 in labour depending on the site.

Straightforward replacement of an existing electric hot water system: This is the simplest scenario. The plumber connects to existing plumbing and the existing electrical circuit. Labour is typically $600–$1,000.

Replacing a gas hot water system: Gas-to-heat-pump conversions require capping the gas line and running a new electrical circuit. Add $300–$500 for the electrical work on top of standard labour. Total additional cost over a like-for-like swap: $900–$1,500.

Factors that can increase installation cost:

• No nearby power outlet or circuit — switchboard upgrade may be required
• Tile roof or multi-storey access if the unit is roof-mounted
• Relocating the unit to a different part of the property (extended plumbing runs)
• Long pipe runs between tank and delivery points
• Areas with limited tradespeople, where call-out rates are higher

All-in installed cost summary:

Scenario	Total Installed Cost (after STCs)
Entry model (e.g. iStore 270L), simple swap-out	$2,800–$3,800
Mid-range (e.g. Solahart Atmos Eco), standard install	$4,000–$5,500
Premium CO2 (e.g. Reclaim 250), standard install	$5,800–$7,500

These figures assume a single-storey home, reasonable site access, and no major electrical work required.

STC Rebates — What You Actually Save

Heat pump hot water systems qualify for Small-scale Technology Certificates (STCs) under the federal government’s Small-scale Renewable Energy Scheme. STCs are not a rebate you apply for separately — they are applied as a point-of-sale discount by the installer, who claims them on your behalf.

How STCs work: The number of STCs assigned to a heat pump depends on the model’s rated efficiency, the climate zone the system is installed in, and the number of years remaining in the deeming period (which reduces annually until 2031). The installer surrenders those certificates and passes the value back to you as a discount off the purchase price.

Typical STC value for heat pumps: In most Australian climate zones (covering the bulk of the population), STCs are worth $800–$1,200 per heat pump hot water system at current certificate prices. Systems with higher efficiency ratings generate more certificates and receive a higher discount.

The Ecogenica R215 at $2,200 supply becomes approximately $1,200 after a typical STC discount — making it one of the most affordable heat pump options available.

State rebates on top of STCs: Several state governments offer additional incentives beyond the federal STC scheme. These change periodically, so check the current details for your state:

• Queensland heat pump rebates
• New South Wales heat pump rebates
• Victoria heat pump rebates

Running Costs: Heat Pump vs Gas vs Electric

This is where the economics of a heat pump become compelling. The upfront cost is higher than a resistive electric storage system, but the operating costs are dramatically lower.

A heat pump does not generate heat directly — it moves heat from the ambient air into the water tank. At a COP of 4.8, it delivers 4.8 units of heat energy for every 1 unit of electricity consumed. A resistive element, by comparison, delivers exactly 1 unit of heat per unit of electricity.

Annual running cost comparison (3–4 person household, 270L tank, 30c/kWh grid tariff, $1.80/MJ gas):

Hot Water System	Annual Electricity	Annual Gas	Annual Total (Est.)
Heat pump (COP 4.8)	$100–$150	$0	$100–$150
Gas storage	$0	$400–$700	$400–$700
Electric storage (resistive)	$600–$1,200	$0	$600–$1,200
Heat pump + solar surplus	~$10–$30	$0	~$10–$30

The “heat pump + solar surplus” scenario assumes the system is configured to run primarily during daylight hours when solar generation is available, effectively using energy that would otherwise be exported to the grid at the feed-in tariff rate (typically 5–10 c/kWh). At that effective rate, annual running costs fall to near-zero for many households.

Is a Heat Pump Worth the Extra Cost?

For virtually all Australian households replacing either gas hot water or electric storage, the heat pump makes financial sense. The payback depends on what you are replacing.

Payback vs electric storage:

An entry-level heat pump installed typically costs around $1,500–$2,000 more than a comparable-capacity electric storage system after STCs. Annual savings against electric storage at 30 c/kWh are $500–$1,000. That gives a payback period of roughly 1.5–3 years. For a system with a 10+ year lifespan, the economics are not close.

Payback vs gas hot water:

A mid-range heat pump installed costs roughly $2,000–$3,500 more than a gas storage replacement. Annual savings against gas at $400–$700/yr produce a payback of 4–7 years. With gas prices continuing to rise and some state governments actively encouraging gas-to-electric switching, this payback window is narrowing.

10-year total cost of ownership comparison:

System	Purchase (after STCs)	Running (10 yr)	Total (10 yr)
Heat pump	$2,500–$4,000	$1,000–$1,500	$3,500–$5,500
Gas storage	$1,200–$2,000	$4,000–$7,000	$5,200–$9,000
Electric storage (resistive)	$800–$1,500	$6,000–$12,000	$6,800–$13,500

Over a decade, the heat pump is cheaper than both alternatives in nearly every scenario — even at the high end of its installed cost range.

When a heat pump is not the right choice:

• Very cold climate without a CO2-refrigerant model: standard heat pumps lose efficiency significantly below 5°C ambient. In alpine areas or Tasmania, a Reclaim or Sanden CO2 unit is worth the premium.
• Rental properties where the owner is not motivated by operating cost savings.
• Situations where the installation complexity adds significantly to cost and a simpler solution is more practical.

Frequently Asked Questions

How much does a heat pump hot water system cost in Australia? Supply prices range from $2,200 (Ecogenica R215) to $5,800 (Sanden 250 CO2) before installation. After STCs (typically $800–$1,200 off), entry-level models like the iStore 270L cost around $1,800 in product alone. All-in installed, expect $2,800–$3,800 for entry models and $5,800–$7,500 for premium CO2 units.

How much does it cost to run a heat pump hot water system? A heat pump with COP of 4.5–5 uses around 300–450 kWh per year for a 3–4 person household. At 30 c/kWh, that is $90–$135 per year. On solar surplus at an effective rate of 3–5 c/kWh, running costs fall to $10–$20 per year. Compare that to gas hot water at $400–$700/yr and electric storage at $600–$1,200/yr.

What STC rebate do heat pumps get in Australia? Heat pump hot water systems on the Clean Energy Regulator’s approved list receive STCs worth $800–$1,200 in most Australian climate zones. These are applied as a point-of-sale discount by the installer — you do not need to lodge a separate claim. The exact amount depends on the model, your climate zone, and current STC prices. Some states add rebates on top of the federal STC.

How much does heat pump installation cost? A straightforward replacement of an existing electric hot water system typically costs $600–$1,000 in labour. More complex installations — moving the unit, upgrading the switchboard, significant plumbing modifications — can add $500–$1,500. Budget $3,000–$5,000 all-in for a mid-range heat pump in most Australian homes.

Is a heat pump worth the extra cost vs electric storage? Yes, in almost all cases. A heat pump with COP 4.5 uses 4.5 times less electricity than a resistive element for the same hot water output. The payback period vs electric storage is typically 1.5–3 years depending on electricity rates, and even shorter if you use solar surplus charging. Over a 10-year lifespan, the total cost of ownership almost always favours the heat pump by a significant margin.

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See our best heat pump hot water systems ranking to find the right model for your budget and climate. For a complete guide to how heat pumps work and how to choose one, see our heat pump hot water guide. To check what rebates are available in your state, see our heat pump rebate guide.