Heat Pump to Electric Hot Water: Is It Worth Upgrading?
Heat Pump to Electric Hot Water: Should You Switch Back?
Sometimes — but in most suitable homes, replacing a heat pump with standard electric storage means giving up a major efficiency advantage.
Heat pump and standard electric systems both store hot water in a tank, so changing between them can look simple. The important difference is how they use electricity. A standard resistance element turns electricity directly into heat, while a heat pump uses electricity to move heat from the surrounding air into the water. If your existing heat-pump location still suits the technology, we recommend comparing a replacement heat pump before stepping back to conventional electric storage.
Should I Go Back to Electric?
This gives a preliminary direction only. The existing heat pump, site, electrical supply, household demand and reason for changing should all be checked before choosing the replacement.
1Why are you considering standard electric?
2What is the current heat-pump location like?
3Do you have rooftop solar PV?
Guide only. Tank size, recovery, airflow, compressor noise, electrical supply, tariffs, solar PV, drainage, access and the reason the old heat pump underperformed can all change the best replacement choice.
Can You Replace a Heat Pump With Standard Electric Storage?
Yes. Both are storage hot-water systems, so a standard electric cylinder can often use the same general tank area and existing hot and cold water services. The bigger question is whether you should. If the current site still suits a heat pump, switching to resistance electric normally means using substantially more electricity to heat the same water.
Why Homeowners Consider Changing From Heat Pump to Electric
The reasons are usually practical rather than efficiency based. Standard electric storage is simpler, quieter and commonly cheaper to buy. Those advantages are real — but they should be weighed against the extra electricity required over the life of the system.
Lower Purchase Price
Conventional electric storage is usually substantially cheaper to purchase than a new heat pump before eligible incentives are considered.
No Compressor or Fan
An electric storage tank heats silently, which can be valuable where the only practical tank position is close to a bedroom, neighbour or enclosed courtyard.
Simpler Technology
Resistance-electric storage has fewer refrigeration components and is familiar to many installers, which can make replacement decisions feel simpler.
Previous Heat Pump Failed Early
A bad ownership experience can understandably push a homeowner toward simpler technology. The important question is whether the failure was model-specific or a genuine site mismatch.
Poor Recovery or Sizing
An undersized or poorly scheduled heat pump can run out of hot water. That can often be corrected with better sizing rather than abandoning heat-pump technology.
Difficult Heat-Pump Location
A tight, enclosed or acoustically sensitive site can legitimately make a silent electric tank the more practical replacement.
Heat Pump vs Electric: Current Installed Today Starting Prices
Standard electric usually wins the upfront-price comparison. Heat pump usually wins the energy-use comparison. Look at the complete ownership pathway rather than choosing from the appliance price alone.
Higher purchase price, but much lower electricity use and potential STC eligibility on qualifying systems and installations.
Current Installed Today collection starting price. Product, installation and incentive treatment vary by model and location.
Lower upfront purchase cost and silent operation, but higher electrical energy demand for normal water heating.
Current Installed Today collection starting price. Final installed cost depends on tank size, circuit, tariff, access and installation scope.
Heat Pump vs Standard Electric Hot Water
| Consideration | Replacement Heat Pump | Standard Electric Storage |
|---|---|---|
| How it heats | Transfers heat from surrounding air into stored water | Resistance element converts electricity directly into heat |
| Energy use | Strong advantage Government guidance says heat pumps use about 30% of the energy of conventional electric hot water | Higher electrical energy requirement for the same heating task |
| Upfront price | Usually higher before incentives | Usually lower |
| Operating noise | Compressor and fan operate during heating | Silent heating |
| Solar PV | Excellent pairing Lower demand can be scheduled into daytime generation | Can also be timer-controlled to daytime PV, but remains resistance heating |
| STC pathway | Eligible listed air-source heat pumps may qualify when scheme rules are met | No renewable hot-water STCs for conventional resistance-electric storage |
| Airflow requirement | Needs appropriate airflow and manufacturer clearances | Much less dependent on surrounding airflow |
| Cold-air discharge | Yes while operating | No |
| Best reason to choose | Efficiency, solar integration and lower long-term electricity demand | Lowest upfront cost, silence or a site that genuinely does not suit a heat pump |
A Failed Heat Pump Does Not Necessarily Mean You Should Abandon Heat Pumps
Before changing technology, work out why the old system disappointed you. If the problem can be fixed by choosing a better model, size, location or operating schedule, a replacement heat pump can keep the energy advantage without repeating the same ownership experience.
Model Quality
Not every heat pump has the same compressor, tank construction, controls, warranty, service network or noise characteristics.
Incorrect Sizing
A system that is too small for household demand can rely heavily on boosting or run short during peak-use periods.
Poor Location
Restricted airflow, poor condensate management or reflected noise can make a capable heat pump perform badly in practice.
Control Settings
Timers, boost behaviour and operating windows can make the difference between efficient daytime operation and frustrating recovery.
Installation Quality
Pipework, valves, electrical connection, drainage and commissioning all affect the finished hot-water system.
Service Support
A well-supported brand and installer pathway can matter as much as the headline efficiency figure if a fault occurs later.
Have Solar PV? We Would Strongly Recommend Staying With Heat Pump
Both systems can be scheduled into the daytime solar window, but the heat pump needs far less electricity to perform the water-heating task. That means more of your rooftop generation remains available for the rest of the home, battery charging or export.
Heat Pump + Solar
Lower electrical demand makes it easier to run water heating from available daytime PV without consuming such a large share of production.
Electric + Timer
A timer can move a resistance element into the solar window, but it changes when the energy is used rather than how efficiently the water is heated.
Electric + Diverter
A solar diverter can direct surplus generation into the tank, but the element still uses resistance heating and can draw more heavily from the grid or battery when solar is insufficient.
If rooftop solar is already installed and the existing heat-pump position is workable, moving back to standard electric is difficult to justify on energy efficiency alone. We would normally replace the heat pump with a better-matched heat pump and schedule it around solar generation.
When Standard Electric Can Genuinely Be the Better Choice
Standard electric still has legitimate use cases. We would choose it when the property or budget creates a real advantage that outweighs the heat pump's lower energy requirement.
Lowest Immediate Cost Is Essential
For an urgent failure with a tightly constrained budget, a standard electric tank can be the most accessible way to restore hot water quickly.
Noise Cannot Be Managed
If the only practical location is directly beside a bedroom or sensitive neighbour and relocation is not sensible, silent electric heating can be the better site outcome.
The Site Is Genuinely Enclosed
Where suitable airflow cannot be provided and there is no practical alternate location, conventional electric storage may fit the site more naturally.
Very Low Hot-Water Use
When household demand is extremely low, the absolute running-cost saving from higher efficiency can be smaller and the upfront premium can take longer to recover.
Short Ownership Horizon
If the property is likely to be sold or substantially renovated soon, long-term energy savings may matter less than immediate capital cost.
Heat-Pump Relocation Is Disproportionate
A difficult relocation, drainage change or access problem can sometimes make a straightforward electric replacement more practical.
Can Standard Electric Use the Existing Heat-Pump Tank Position?
Often, because both systems use a ground-level storage tank. The existing base, water services and drainage can be useful, but the replacement cylinder still needs to fit the location and comply with current installation requirements.
Tank Base
The existing base may be reusable if it is sound, level and large enough for the new electric cylinder.
Hot & Cold Plumbing
Existing services can often be adapted, although connection heights and pipework may need alteration.
Relief Drainage
The new system still needs compliant relief and discharge arrangements even if drainage already exists nearby.
Condensate No Longer Required
Standard electric storage does not produce heat-pump condensate, so the condensate drain associated with the old unit may become redundant.
Airflow Becomes Less Important
The replacement tank does not need compressor airflow or cold-air discharge clearances in the same way a heat pump does.
Electrical Load Still Needs Checking
A standard electric element may have different circuit and tariff requirements from the heat pump being removed.
Electrical Changes: Do Not Assume the Existing Heat-Pump Supply Suits a New Electric Tank
Both systems use electricity, but that does not make the electrical requirements identical. A heat pump can have a relatively modest normal operating load, while a resistance-electric cylinder may use a larger heating element and different tariff or control arrangement.
Circuit Capacity
The electrician should confirm cable size, breaker or RCBO protection and the load required by the selected electric element.
Controlled Load / Off-Peak
Some electric-storage systems are arranged on a controlled-load tariff. Availability and suitability depend on the property, retailer and system size.
Solar Daytime Control
If the tank will be heated from daytime PV, the control strategy should be considered alongside household solar production and any battery.
STCs and Rebates: Switching to Standard Electric Can Change the Upfront Comparison
Eligible air-source heat pumps can create federal Small-scale Technology Certificates when the exact model and installation meet current scheme requirements. Conventional resistance-electric storage does not receive that renewable-hot-water STC pathway.
Eligible Models May Receive STCs
Check the exact model, installation date, capacity and completed installation against the current federal register and scheme rules.
No Renewable Hot-Water STCs
Conventional resistance-electric storage does not create STCs under the renewable hot-water pathway.
Replacement Rules Can Differ
State or territory efficiency schemes may apply extra eligibility rules, including the existing system type, approved products, providers or pre-approval.
Do You Need the Same Tank Size When Moving to Electric?
Not necessarily. The old heat-pump litres are useful context, but replacement sizing should consider the household's real peak demand, recovery strategy, tariff and when the tank is allowed to heat.
Household Size
Occupant count is a starting point, but shower duration, baths and simultaneous demand can matter more than a simple people-to-litres rule.
Off-Peak Storage
If the electric tank only heats in a restricted tariff window, it may need enough stored capacity to cover the full period between heating cycles.
Continuous Tariff
A system that can recover throughout the day may not need to be sized in exactly the same way as an off-peak-only tank.
Solar PV
Daytime heating can be useful with rooftop solar, but a conventional element can consume a much larger share of available PV than a heat pump.
Future Demand
Allow for growing families, extra bathrooms, renovations or changing occupancy before choosing a marginal tank size.
Why the Old System Underperformed
If the heat pump regularly ran out of water, confirm whether the actual problem was storage capacity, recovery, controls or household use before selecting the next tank.
Supply Only vs Supplied & Installed
Installed Today offers supply-only hot-water products across supported Australian metro areas, with supplied-and-installed options available on selected systems in eligible Brisbane and Gold Coast service areas.
You Arrange the Licensed Trades
Best when you already have the plumbing and electrical pathway arranged. Confirm the replacement tank size, circuit requirements, valves, drainage, removal and any incentive pathway before installation.
- Product price is for the selected system unless stated otherwise.
- Installation and electrical conversion are not automatically included.
- Confirm any STC or state-scheme process before work starts.
Available Where Offered
Where an Installed Today installation option is available, work through the product's installation selections and site requirements before checkout.
- Availability depends on product and location.
- Electrical changes can affect final scope.
- Site and compliance requirements still apply.
How a Heat-Pump-to-Electric Conversion Usually Works
The physical conversion can be straightforward, but the decision should start by confirming whether standard electric is actually solving a problem that a better replacement heat pump cannot solve more efficiently.
Identify Why You Want to Change
Separate model failure, noise, sizing and service issues from genuine heat-pump site limitations.
Compare Both Replacement Paths
Price the electric option against a correctly sized replacement heat pump after any eligible incentives.
Check Electrical Requirements
Confirm whether the existing heat-pump supply suits the selected electric element, tariff and protection requirements.
Replace & Commission
Remove the old system, complete plumbing and electrical work, confirm valves and drainage, and commission the replacement correctly.
Heat Pump to Electric Hot Water FAQs
Can I replace a heat pump hot water system with a standard electric tank?
Yes. Both are storage systems, so the existing tank area and water services can often be adapted. The electrical supply, tank size, valves, drainage and current installation requirements still need to suit the new electric system.
Is standard electric cheaper than replacing my heat pump?
Standard electric is usually cheaper to purchase upfront. A replacement heat pump is normally more expensive initially but uses substantially less electricity in normal operation, so compare both upfront and ongoing costs.
Does a failed heat pump mean I should go back to electric?
Not necessarily. The failure may be specific to the model, installation, sizing, controls or service support. If the site still suits heat-pump operation, compare a better replacement heat pump before changing technology.
How much energy does a heat pump use compared with electric storage?
Australian Government guidance says heat-pump water heaters use about 30% of the energy of a conventional electric hot-water system. Actual household consumption varies by model, climate, usage, settings and operating schedule.
Is electric hot water better if my heat pump was noisy?
Standard electric is silent while heating, so it can be better for a genuinely noise-sensitive location. Before switching, compare quieter heat-pump models or a practical relocation if you want to retain the lower energy use.
Should I switch to electric if I have solar panels?
Usually we would favour staying with heat pump. Both technologies can use daytime solar electricity, but a heat pump needs far less electrical energy for the same water-heating task, leaving more solar available for other loads.
Can I run standard electric hot water from a solar timer or diverter?
Yes, suitable controls can shift resistance heating into periods of solar generation. This can improve solar self-consumption, but it does not change the underlying resistance-heating efficiency or reduce the element's electrical demand in poor solar conditions.
Can a replacement heat pump receive STCs?
Eligible air-source heat-pump models may create Small-scale Technology Certificates when the exact model and completed installation satisfy current scheme requirements. State or territory programs can impose additional rules.
Does standard electric receive STCs?
No. Conventional resistance-electric storage does not receive the renewable hot-water STC pathway available to eligible solar and air-source heat-pump systems.
Can the electric tank use my existing heat-pump circuit?
Possibly, but it should not be assumed. The electrician needs to check the selected electric element load, cable, protection, isolation and tariff arrangement against the existing circuit.
When would Installed Today recommend changing to standard electric?
Standard electric can make sense where lowest upfront cost is the overriding priority, the site genuinely cannot accommodate a heat pump, noise cannot be managed, or the heat-pump relocation and upgrade scope would be disproportionate. If both technologies suit and the financial difference is close, we would normally recommend staying with heat pump.
Thinking of Switching Back to Electric? Compare a Better Heat Pump First
Standard electric is simple, quiet and cheaper upfront — but if your current site still suits heat-pump operation, replacing the old heat pump with a properly sized, better-matched model usually preserves a major long-term efficiency advantage. Compare both pathways before making a permanent step back to resistance heating.
