Australian pool owners can spend anywhere from almost nothing to more than $3,500 a year heating their pool, depending on the system they choose. Rising electricity and gas prices mean choosing the right heating option matters more than ever. The three main systems used in Australia are solar pool heating, heat pump pool heating, and gas pool heating — each with different upfront costs, running costs, and performance benefits.
Quick Cost Comparison
Key takeaway:
Solar heating is usually the cheapest to run long term. Heat pump heating offers reliable year-round heating at moderate costs. Gas heating heats quickly but is the most expensive to operate.
What Affects Pool Heating Costs Australia?
Several factors influence heating costs:
- Pool size: Larger pools need more energy.
- Target temperature: Heating to 29°C costs more than maintaining 26°C.
- Climate: Warm states like Queensland and WA need less energy than Victoria or Tasmania.
- Usage: Daily heating costs more than occasional weekend use.
- Pool covers: Covers can reduce heat loss by up to 70%.
- Energy prices: Electricity and gas tariffs vary by state.
Solar Pool Heating
Solar pool heating is the lowest-cost option for most Australian households. Roof-mounted solar collectors absorb heat from the sun while your pool pump circulates water through the system.
Running Costs
Solar systems cost roughly $50–$100 per year to run because the only ongoing expense is electricity for the pool pump.
Advantages
- Lowest running costs
- Long lifespan (15–20 years)
- Environmentally friendly
- Ideal for warm climates
- Extends swimming season by several months
Disadvantages
- Depends on sunshine
- Less effective during cloudy weather
- Requires suitable roof space
- Not ideal for spas requiring rapid heating
Best For
Solar pool heating works best in Queensland, Western Australia, and northern NSW where sunlight is strong and consistent. Payback periods are often only 3–5 years.
Heat Pump Pool Heating
Heat pump pool heating is increasingly popular because it provides reliable heating at much lower costs than gas. These systems work like reverse-cycle air conditioners, extracting heat from the surrounding air and transferring it into pool water.
Running Costs
Typical operating costs range from $250–$800 per year, depending on climate and usage.
Modern heat pumps are highly efficient thanks to their Coefficient of Performance (COP). A COP of 5 means the unit produces 5 kW of heat for every 1 kW of electricity used.
Advantages
- Works day and night in most weather
- Consistent temperature control
- Much cheaper than gas
- No roof installation needed
- Eligible for rebates in many states
- Excellent when paired with rooftop solar PV
Disadvantages
- Higher upfront cost than gas
- Less efficient in very cold weather
- Produces some operational noise
Best For
Heat pump pool heating suits homeowners who:
- Want year-round swimming
- Live in cooler climates like Victoria or the ACT
- Do not have a suitable roof for solar
- Already own rooftop solar panels
When powered by rooftop solar PV during the day, running costs can become extremely low.
Gas Pool Heating
Gas pool heating is known for one major advantage: fast heating. It can heat spas and pools rapidly, making it useful for occasional use or entertainment.
Running Costs
Gas heating is the most expensive option, costing around $1,200–$3,500+ per year. LPG systems cost even more.
Advantages
- Fastest heat-up time
- Works in any weather
- Lower equipment cost initially
- Excellent for spas and occasional heating
Disadvantages
- Highest running costs
- Rising gas prices
- Shorter lifespan
- Higher carbon emissions
- Increasing government restrictions on gas connections
Best For
Gas pool heater may suit owners who:
- Primarily, heat a spa
- Only use the pool occasionally
- Already have an existing gas connection
However, long-term operating costs are significantly higher than solar or heat pumps.
Solar vs Heat Pump Pool Heating
The debate around solar vs heat pump pool heating depends largely on climate and usage.
Choose Solar Pool Heating If:
- You live in QLD, WA, or northern NSW
- You have a suitable roof
- You want the lowest running costs
- You swim regularly through warmer months
Choose Heat Pump Pool Heating If:
- You want year-round swimming
- Your roof is unsuitable for solar
- You live in a cooler climate
- You already have rooftop solar panels
In warmer climates, solar often favours solar due to extremely low running costs. In cooler states, heat pumps provide better year-round reliability.
10-Year Ownership Comparison
For a standard 50,000-litre pool in South-East Queensland:
- Solar pool heating: ~$5,750 total over 10 years
- Heat pump pool heating: ~$10,500 total
- Gas pool heating: ~$26,000 total
This shows how lower running costs can outweigh higher upfront costs over time.
Pool Heating Costs by State
Warm climates heavily favour solar pool heating, while cooler states often benefit more from heat pump pool heating.
Government Rebates in 2026
Several incentives can reduce upfront costs for heat pumps:
- Federal STCs: Discounts for eligible heat pumps
- Victorian Solar Homes Program: Up to $1,400 rebate
- NSW Energy Savings Scheme: Upfront discounts available
Solar pool heating generally does not qualify for federal rebates.
How to Reduce Pool Heating Running Costs
No matter which system you choose, these tips can lower operating costs:
Use a Pool Cover
A pool cover dramatically reduces heat loss and often pays for itself within a season.
Lower the Temperature
Reducing the temperature by even 1–2°C can significantly cut energy use.
Heat Only When Needed
Use programmable timers and schedules instead of maintaining temperature constantly.
Use Solar Power
If you have rooftop solar PV, run heat pumps during daylight hours to minimise electricity costs.
Choose the Correct Size System
Oversized or undersized heaters operate inefficiently and increase costs.
Ready to Slash Your Pool Heating Costs?
For most Australian households, solar pool heating delivers the lowest long-term running costs and exceptional value in sunny climates. Heat pump offers the ideal balance of efficiency, reliability, and year-round comfort, while gas pool heating is best suited for fast heating and occasional use — although ongoing costs are significantly higher.
Before choosing a system, consider your climate, swimming habits, roof suitability, and long-term energy costs. The right system can save you thousands of dollars over its lifetime while extending your swimming season in comfort.
Why More Australian Homeowners Choose Thermo Pools
At Thermo Pools, we help homeowners find the most efficient and cost-effective pool heating solution for their property. Whether you’re comparing solar vs heat pump pool heating or looking for expert advice on reducing pool heating running costs, our team can recommend the right system tailored to your pool, location, and lifestyle.
Thermo Pools provides expert pool heating services across Sydney, helping homeowners retrofit reliable and long-lasting systems. Whether you need advice, installation, or even a quick pool heater repair before upgrading, our team is here to help.
Call us today on (02) 88 50 40 30 or request a quote to find the right solar pool heating solution for your home.
