Heat Pump Hot Water
Efficient hot water heating that works with your solar. Find the right heat pump for Australian conditions.
Why heat pump hot water is one of the best energy upgrades
Hot water typically accounts for 25-30% of household energy use. Switching from a traditional electric or gas system to a heat pump can reduce hot water energy consumption by 65-75%, making it one of the most impactful energy upgrades you can make.
65-75% Less Energy
Heat pumps move heat rather than create it, using refrigeration technology to extract warmth from the air. For every 1kW of electricity used, they produce 3-5kW of heat energy.
Faster Payback
With running cost savings of $300-600 per year compared to traditional electric, plus generous government rebates in most states, payback periods are often 3-5 years.
Solar Perfect Partner
Heat pumps can be timed to run during peak solar generation. Combined with solar panels, your hot water becomes virtually free to run—a powerful combination.
Compared to gas hot water
As gas prices rise and environmental concerns grow, heat pumps are increasingly the smarter choice over gas. They have no direct emissions, work with solar, and typically have lower running costs than gas (especially when solar-powered). The upfront cost is offset by rebates available for heat pumps but not for gas systems.
Is a heat pump right for your home?
Heat pump hot water systems are one of the most cost-effective energy upgrades for Australian homes. Here’s what to consider.
Is your current hot water system aging?
Heat pumps are ideal when replacing old electric or gas systems.
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If your current system is 10+ years old or showing signs of failure, now is the perfect time to upgrade. Replacing before complete failure gives you time to choose the right system rather than making an emergency decision.
Is your roof in good condition?
Heat pumps can time their operation to use free solar power.
Modern heat pumps can be programmed to heat water during peak solar generation (typically 10am-2pm). This means your hot water is essentially free, dramatically improving the economics.
Do you have significant daytime electricity usage?
Switching from electric resistance saves up to 70% on hot water costs..
Traditional electric hot water systems are energy-hungry. Heat pumps use refrigeration technology to move heat rather than create it, using 65-75% less electricity for the same hot water output.
Is your roof mostly unshaded?
Heat pumps require outdoor airflow for optimal operation.
Heat pumps extract heat from the surrounding air, so they need adequate ventilation. A location near the house with 300-500mm clearance on most sides is typically sufficient.
Additional factors to consider
Household size
A family of 4 typically needs a 270-315L tank. Larger families may need 400L+. Undersizing leads to cold showers; oversizing wastes money.
Climate suitability
Heat pumps work in all Australian climates but efficiency varies. Cold climate models (Sanden, Reclaim) perform better in Tasmania and alpine regions.
Noise considerations
Heat pumps can be timed to run during peak solar generation. Combined with solar panels, your hot water becomes virtually free to run—a powerful combination.
Good news: Heat pumps typically have excellent payback periods and may qualify for government rebates.
Solar Panel Brand Comparison
Our expert ratings help you compare leading solar panel brands available in Australia.
Tank Size
Household
Notes
160-200L
1-2 people
Compact units, suitable for apartments or small homes. May struggle with consecutive showers.
270-315L
3-4 people
Most popular size for average Australian families. Good balance of capacity and efficiency.
400L+
5+ people
Large families or high hot water usage. Some models allow multiple units for very high demand.
Recovery time matters
Heat pumps heat water more slowly than electric elements—typically 60-90 minutes to fully reheat a tank. This is usually fine as heating happens during the day when you’re not using hot water, but consider this if your household has unusual usage patterns.
Our sizing advice
When in doubt, go slightly larger. The marginal cost difference between a 270L and 315L tank is small, but running out of hot water is frustrating. If you have solar, a larger tank also acts as an energy store—heating more water during the day for evening use.
Solar Panel Brand Comparison
Our expert ratings help you compare leading solar panel brands available in Australia.
Brand
Best For
Key Strength
Expert Rating
Brand
Ratings are based on independent expert assessment considering performance, reliability, warranty, and Australian market suitability. Last updated: January 2026.
Heat pump rebates & savings
Heat pumps qualify for significant government rebates in Australia, often reducing the upfront cost by $1,000-$3,000+. These rebates recognise heat pumps as a key technology for reducing household emissions.
Federal STCs (Nationwide)
Small-scale Technology Certificates provide an upfront discount typically worth $700-1,000 on eligible heat pumps. This applies nationally and is usually deducted from the purchase price by installers.
State-Specific Rebates
Victoria, NSW, South Australia, and other states offer additional rebates ranging from $500-$1,000+. Eligibility often depends on income, existing hot water type, and property ownership.
Important note about rebates
Rebate programs change frequently. Amounts, eligibility criteria, and availability vary by state and may change without notice. Always verify current rebates before making a purchasing decision.
How we rate heat pumps
Our heat pump ratings consider factors specific to hot water systems, weighted according to their importance for Australian homeowners.
Efficiency (COP Rating)
Coefficient of Performance—how much heat energy is produced per unit of electrical energy. Higher COP means lower running costs.
30%
Warranty & Longevity
Product and performance warranty terms. Premium panels offer 25-year product warranties; budget options typically offer 10-15 years.
25%
Reliability & Quality
Historical failure rates, manufacturing quality, and degradation over time based on real-world data.
20%
Australian Support & Availability
Local support presence, warranty claim process in Australia, and consistent product availability.
15%
Value for Money
Overall cost relative to quality and expected lifetime performance. Note: cheapest isn’t always best value.
10%
We do not accept payment or incentives from manufacturers. Our ratings reflect genuine, independent assessment.
Find the right heat pump for your home
Get a personalised recommendation including rebate eligibility for your state.