Adelaide & South Australia · Residential hot water
SA heat pump hot water rebate 2026
Replacing an electric or gas hot water system with an efficient heat pump remains a supported activity under South Australia's REPS scheme, and federal STCs usually apply to the same installation. Both come off the installed price upfront, not as cash you claim back.
Free eligibility review · No obligation · Not a government website
What are you replacing?
Whichever system you have now, the same quick postcode check covers it.
Water heating replacement remains a supported activity under REPS, which rolled into its 2026 to 2030 period on 1 January 2026. There is no single fixed rebate amount: participation and offers vary by provider, and eligibility depends on the property, the existing system, the replacement product and the provider. Regular South Australian households can access discounts through participating providers, no concession card needed, with a slightly deeper discount and a waived co-payment for Priority Group homes as a bonus. Retailers carry annual targets, so product, provider and installation availability can still vary during the year. Federal STCs operate separately and both incentives may contribute to one eligible installation. Last reviewed 21 August 2026.
Adelaide installed price guide
The number that matters is the complete installed price after every incentive, not the headline rebate. As an indicative Adelaide market guide, most standard electric-to-heat-pump replacements currently land between about $2,400 and $5,000 fully installed after REPS and STC discounts, with entry-level promotional offers sometimes below that range and premium split systems above it. Before incentives, the same systems typically price from about $3,300 to $6,500 installed. Gas-to-heat-pump conversions usually cost more than a straight electric swap because of the electrical and gas work involved.
What moves the price up or down
- Brand, model and tank capacity, the single biggest factor, with integrated budget units cheapest and premium split systems dearest.
- Electrical work, such as a new dedicated circuit or switchboard changes.
- Plumbing and valve changes, including tempering valves and pressure relief drainage.
- Gas disconnection or capping on a gas-to-heat-pump conversion.
- Site access and location, tight side passages, upper floors or long pipe runs add labour.
- Removal of the old system and any making good.
- Rebate and certificate eligibility, the REPS contribution and STC value vary with the model, your household and the provider's current offer.
Estimator
Hot water running cost calculator
Estimate what your hot water costs to run each year now, and what a heat pump could cost instead. Adjust the rates to match your own bill.
How REPS and federal STCs work together
Two separate schemes can discount the same eligible installation. REPS is South Australia's state scheme: large energy retailers are obliged to fund energy-saving upgrades, and accredited providers pass part of that value on as a discount. STCs come from the federal Small-scale Renewable Energy Scheme: eligible heat pump models create certificates that are usually assigned to the provider in exchange for a further upfront discount.
| Scheme | What it is | How the discount is received | What must be verified |
|---|---|---|---|
| SA REPS | Retailer-funded SA energy productivity activity, administered by ESCOSA | Upfront provider contribution or discount on the installed price. A minimum co-payment of $33 including GST may apply, waived for Priority Group households | Existing system, property, replacement product, one water heating activity per premises, and the provider's current offer |
| Federal STCs | Certificates created by eligible heat pump models under the Small-scale Renewable Energy Scheme | Usually assigned to the provider for an upfront discount at the point of sale | Exact model on the Clean Energy Regulator register, location, installation date and the certificate price at the time |
STC value is not a fixed dollar amount. It depends on the model, the climate zone and the certificate market price when the system is installed, which is why a legitimate quote shows it as a line item rather than a promise.
Who is eligible
- Residential SA properties, metropolitan Adelaide and regional South Australia alike, plus small businesses under separate commercial activities.
- An existing system being replaced, the activity replaces an electric or gas water heater with an eligible efficient model, and only one REPS water heating activity generally applies per premises.
- An eligible replacement model, the heat pump needs to satisfy scheme requirements, and STCs require the exact model to be on the Clean Energy Regulator register.
- A participating provider, only participating REPS activity providers can create REPS value, and their offers open and close through the year.
- Renters can often take part with the property owner's consent for the installation.
- Regular households are covered, REPS hot water upgrades are not limited to concession households, and everyday South Australian homes access them through participating providers. You do not need a concession card.
- Priority Group households get a bonus, a slightly deeper discount and the minimum co-payment waived. You may qualify if someone in the home holds a Commonwealth pensioner concession card, a Health Care Card or Low Income Health Care Card, or an eligible veterans' card, receives the SA Government energy bill concession, rents the home for $500 a week or less, is in a retailer hardship program or on a retailer payment plan, or has been referred by a registered SA financial counsellor. Priority status is confirmed by the participating provider.
- Final provider assessment, every installation is subject to a final eligibility check under current scheme rules. Not every household will qualify, and offers vary.
Replacing a broken hot water system in Adelaide
If your hot water has died, you don't need to spend days researching schemes: a broken electric or gas system can usually be replaced with an eligible heat pump under the same rebate pathways, so the discount applies to the urgent replacement too. The fastest way to an accurate replacement plan is to send a few photos with your enquiry:
The model plate
A clear photo of the sticker or plate on your old unit showing the brand, model and capacity.
The whole unit and plumbing
A step-back photo showing the full system, the pipework around it and the space it sits in.
What it runs on and what it's doing
Electric or gas, and whether the tank is leaking or simply producing no hot water.
Your household and access
How many people live there, and anything about access, tight paths, stairs or a rooftop unit.
Straightforward like-for-like swaps are often done in a single visit once the system and site are confirmed. Gas conversions can take longer because of the electrical and plumbing work. Lead times vary with demand, especially in winter when systems fail most.
Heat pump vs electric, gas and solar hot water
A heat pump is not the right answer for every home, so here's a balanced look at how the main options stack up in Adelaide.
| System | Upfront cost | Running cost direction | Installation | Best fit |
|---|---|---|---|---|
| Heat pump | Higher before incentives, but REPS and STCs cut it substantially | Lowest of the electric options, uses roughly a quarter to a third of the electricity of a resistive tank | Usually straightforward on an electric swap, needs airflow and a sensible location for noise | Most households, especially with rooftop solar or on electric storage today |
| Electric storage | Cheapest to buy | Highest running cost of the common options | Simplest like-for-like swap | Tight budgets where the upfront price is the only constraint |
| Gas storage or instantaneous | Moderate | Depends on gas prices, plus the daily gas supply charge if hot water is the last gas appliance | Simple if gas is already connected | Homes keeping several gas appliances long term |
| Solar thermal | Highest upfront | Very low in sunny months, boost element carries winter | Most complex, roof work and structural considerations | Homes with ideal roof orientation replacing an existing solar thermal system |
Running costs depend on your tariff, usage and the system installed, so treat the direction as a guide rather than a promise.
What size heat pump hot water system do I need?
Sizing is about how much hot water your household draws in its busiest hour, not just how many people live there. Shower length, baths, back-to-back morning showers, the unit's recovery rate, and any timer that limits when it heats all matter. As starting points, not installation recommendations:
| Household | Typical tank size | Worth considering |
|---|---|---|
| 1 to 2 people | Roughly 150 to 180 litres | Compact integrated units suit small households and tight spaces |
| 3 to 4 people | Around 250 to 300 litres | The most common size band, balances capacity and running cost |
| 5 or more people | 300 litres plus | Check the recovery rate for back-to-back showers and bath nights |
If you run the unit on a daytime timer to use solar, slightly larger capacity buys you a bigger buffer of stored hot water for the evening. Cold snaps slow recovery a little, which is another reason not to undersize. Confirm final sizing with the installer against your actual usage.
Do heat pump hot water systems work in Adelaide winter?
Yes. Adelaide's winters are mild by heat pump standards, and a correctly selected unit keeps making hot water on cold mornings. Two things are worth understanding rather than worrying about:
- Efficiency falls as the air gets colder. A heat pump pulls warmth from the surrounding air, so on a cold morning it works harder and recovery slows. Over an Adelaide year the effect on running cost is modest.
- Many units carry an electric boost element. It tops up heating during very cold weather or unusually heavy use, which protects your hot water at some cost to efficiency while it runs.
When comparing models, check the minimum operating temperature, the cold-weather recovery time, and when the boost element activates. And since the compressor runs like a quiet outdoor aircon unit, think about placement relative to bedrooms and neighbours, quieter premium units earn their keep on small blocks.
Switching from gas hot water to a heat pump
Gas-to-heat-pump is one of the most valuable conversions in South Australia, and REPS has historically contributed more where the home disconnects from mains gas entirely rather than staying connected. A proper conversion involves more than swapping the tank:
- Electrical circuit, the heat pump needs a suitable circuit, sometimes a new dedicated one from the switchboard.
- Safe gas disconnection or capping, done by a licensed gasfitter as part of the job.
- Plumbing changes, valve work and sometimes relocating the unit to a better spot.
- The daily gas supply charge, if hot water is your last gas appliance, full disconnection can remove the daily supply charge from your bills entirely, which is an ongoing saving on top of the running cost drop.
- Solar compatibility, once your hot water runs on electricity, a daytime timer lets rooftop solar do the heating.
Because the scope varies house to house, compare the complete conversion cost on an itemised quote rather than the headline rebate figure.
Running your heat pump on daytime solar
A heat pump plus rooftop solar is a natural pair: the tank becomes a battery you already own, storing midday sunshine as hot water for the evening. To get that in practice, ask the installer to set it up at handover:
- Timer or smart control scheduled to run through the middle of the day when solar generation peaks.
- Solar diversion compatibility on some models, which sends excess solar directly to the element.
- Boost element settings, so the resistive boost only cuts in when genuinely needed rather than defaulting on.
- Commissioning and handover, a five minute walkthrough of the schedule, the boost switch and the display saves a lot of guesswork later.
How it works
How Energy Rebate Check works
Check your postcode
Enter your postcode and property type to see the SA pathways that may apply where you live.
Describe your hot water system
Tell us what's installed now, electric, gas or solar, and submit a quick enquiry. Under a minute, no obligation.
We review the possible pathways
Your enquiry is reviewed by the business behind this site (ABN 40 659 398 320) against current REPS and STC pathways.
Compare the complete quote
If it looks worth pursuing, we explain the next steps so you can compare the full installed price.
Energy Rebate Check is an independent information and enquiry service. We don't approve rebates, and eligibility is always confirmed under current scheme rules.
FAQ
SA heat pump hot water questions
Yes. Replacing an existing electric or gas water heater with an efficient heat pump remains a supported water heating activity under the SA Retailer Energy Productivity Scheme (REPS) in 2026, and federal Small-scale Technology Certificates (STCs) usually apply to the same installation. Neither is a fixed cash payment: both are normally applied as discounts on the installed price by an accredited provider, and the value depends on the system, your household and the provider's current offer.
As an indicative Adelaide market guide, most standard electric-to-heat-pump replacements land between about $2,400 and $5,000 fully installed after REPS and STC discounts, with budget integrated units at the lower end and premium split systems above that range. Before incentives the same systems typically price from about $3,300 to $6,500 installed. The final figure depends on the model, tank size, site and any electrical or plumbing work, so always compare complete installed quotes.
Yes. REPS is a South Australian scheme funded by obliged energy retailers, while STCs come from the federal Small-scale Renewable Energy Scheme. They operate separately and both can contribute to the same eligible installation, usually as point-of-sale discounts arranged by the accredited provider, so the price you are quoted should already include them.
No. REPS is not a cash rebate you claim back afterwards. Accredited providers apply the value as a discount on the installed price, and STCs are usually assigned to the provider for an upfront discount in the same way. Some REPS activities require a minimum co-payment of $33 including GST, which is waived for Priority Group households.
Yes. Gas-to-heat-pump replacements are supported, and REPS has historically contributed more where the home disconnects from mains gas entirely rather than staying connected. A gas conversion needs a suitable electrical circuit, safe disconnection or capping of the gas line, and some plumbing changes, so compare the complete conversion cost rather than the headline rebate.
Yes. Adelaide's winters are mild by heat pump standards, and correctly selected units keep producing hot water on cold mornings. Efficiency does fall as the air temperature drops and recovery can slow, which is why many units include an electric boost element. Check the minimum operating temperature, cold-weather recovery time and when the boost element activates before choosing a model.
As a starting point, 1 to 2 people usually suit roughly 150 to 180 litres, 3 to 4 people around 250 to 300 litres, and 5 or more people 300 litres plus. Actual sizing depends on shower habits, baths, peak-hour demand, the unit's recovery rate and any timer settings, so treat these ranges as a guide and confirm sizing with the installer.
Yes. Most heat pumps can be scheduled with a timer or smart control to run in the middle of the day, so solar generation heats the tank and the tank stores that energy as hot water for the evening. Some models also support solar diversion. Ask the installer to set the schedule and boost settings at handover.
Straightforward like-for-like replacements are often completed in a single visit once the system and site are confirmed, while gas conversions can take longer because of electrical and plumbing work. Lead times vary with demand, especially in winter. Sending clear photos of your old system upfront is the fastest way to get an accurate replacement plan.
Compare the final installed amount, not the headline rebate. A good quote names the exact model and tank size, lists what is included (delivery, valves, electrical work, removal of the old unit), shows the REPS and STC discounts separately, and states the warranty. If two quotes show different rebate figures, the complete price after everything is the number that matters.
No. Energy Rebate Check is an independent information and enquiry service. We are not a government website, we do not administer REPS or STCs, and we do not approve rebates. Eligibility is always confirmed under current scheme rules by accredited providers.
Official scheme sources
- Retailer Energy Productivity Scheme (REPS) overview, Essential Services Commission of SA (ESCOSA), scheme administrator
- Retailer Energy Productivity Scheme (REPS) program overview, SA Department for Energy and Mining
- Small-scale Renewable Energy Scheme, Clean Energy Regulator, includes the register of eligible heat pump water heaters
- Hot water systems, YourHome, Australian Government guidance on choosing a system
Rebate details and eligibility on this page are based on REPS and the Small-scale Renewable Energy Scheme and are indicative only. Always confirm current details with the official sources above and your accredited provider before purchase or installation.
Related pages
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