Pool Heating Costs: Heat Pump vs Solar vs Gas in Australia

In South East Queensland an unheated pool is comfortable roughly from November to March. Heating stretches that to eight, ten or even twelve months — the difference between a pool the family uses daily and one that sits idle half the year. Here's what each pool heating system genuinely costs to buy and to run in Brisbane conditions, including live installed prices of the heat pumps and thermal blankets we fit, plus the sizing, running-cost and placement questions we get asked at every free site visit.

The three ways to heat a pool

Electric heat pumps pull warmth from the air like a reverse-cycle air conditioner running backwards: a fan draws air across a coil, refrigerant absorbs the heat, and a heat exchanger transfers it into the pool water as it circulates through your filtration system. For every kilowatt of electricity a heat pump draws, it typically delivers around five kilowatts of heat into the water — that efficiency ratio (the "COP") is why heat pumps have become the default choice for pool heating in Queensland. Newer inverter models ramp their compressor up and down rather than switching on and off, making them quieter and cheaper again once the pool is at temperature. Heat pumps work reliably in almost any weather and hold a set temperature year-round.

Solar pool heating pumps pool water through collector tubes or panels on your roof. It's the cheapest to run — the heat itself is free, you only pay to run a small booster pump — but it's the most weather-dependent option. A run of cloudy days means a cool pool, output collapses exactly when you want heat most (winter), and it can't reliably extend your season much past the shoulder months without a backup heater. Roof orientation, shading and available panel area all limit what solar can do on a given house.

Gas pool heaters heat fastest and don't care about the weather, but running costs are the highest of the three — often $10–$25 per swim session at current gas prices. They suit spas and holiday homes where you heat occasionally and quickly, rather than family pools kept warm continuously.

For a pool you actually want to swim in most of the year in Brisbane, the maths almost always lands on a correctly sized heat pump plus a thermal blanket. More on the blanket below — it matters more than most people expect.

Heat pump prices: our current installed range

These are the Sunlover Oasis heat pumps we install, at live prices from our quoting system. Installed alongside a new pool build, the plumbing and electrical runs are done in one hit, which is the cheapest way to add heating.

• Sunlover Oasis 9kW Heat Pump — $4,125 supplied & installed, suits pools up to 6.5 m
• Sunlover Oasis 13kW Heat Pump — $5,220 supplied & installed, suits pools up to 8.3 m
• Sunlover Oasis 19kW Heat Pump — $7,150 supplied & installed, suits pools up to 9 m
• Sunlover Oasis 24kW Heat Pump — $10,550 supplied & installed, suits pools up to 11 m

Live pricing from our quoting system — the same numbers you'd see on an MFP Easy proposal.

Sizing matters more than brand. An undersized pump runs flat-out all day and still struggles in winter; a correctly sized one cycles gently and costs less to run. Our quoting system matches the pump to the exact model and water volume of your pool.

What size heat pump do I need? Matching kilowatts to litres

Output needs to match water volume, your target temperature, and how far into winter you want to swim. As a working guide for SEQ:

Two adjustments worth knowing: if you want genuine mid-winter swimming (not just an extended season), size up one unit; likewise if the pool is heavily shaded or wind-exposed. A slightly larger pump costs more upfront but simply reaches temperature faster and rests more.

Fibreglass helps here too. An Aqua Technics fibreglass shell insulates noticeably better than concrete, so the same kilowatts hold temperature for less power — one of the quieter running-cost advantages of fibreglass pools.

What does pool heating cost to run?

For a typical 7m fibreglass pool in Brisbane maintained at 28°C with a pool blanket:

What that looks like per month

Annual figures hide how lumpy heating costs are. With a heat pump on a covered 7m pool, expect roughly:

• Summer (Dec–Feb): close to nothing — the pool holds temperature on its own
• Shoulder months (Sep–Nov, Mar–May): typically $50–$120/month
• Winter (Jun–Aug): typically $150–$250/month if you keep swimming right through

Running the pump on an off-peak or solar-PV-friendly tariff during the day, when the air is warmest and the pump is most efficient, trims these numbers further. Every extra degree on the thermostat adds roughly 10–15% to running costs, which is why 27–28°C is the sweet spot for most families rather than 30°C.

How long does it take to heat a pool?

Two different questions hide in this one. Initial heat-up from cold is the slow part: a correctly sized heat pump typically raises pool temperature by roughly 0.5–1°C per hour of running, so bringing a 30,000L pool from 18°C to 28°C usually takes one to two days of daytime running. Holding temperature after that is easy — the pump only replaces overnight losses, typically running a few hours a day.

So the right habit is to set the temperature once and let the system maintain it. Heating from cold every weekend is the most expensive way to own a heat pump; gas suits that occasional-blast pattern better.

Heat pump vs solar in winter

This is the comparison that decides most SEQ buyers. In summer both work fine — solar is arguably better because it's nearly free. The gap opens in winter:

• Solar output depends on roof heat, which is weakest exactly when the water is coldest. In a Brisbane July, unboosted solar generally can't hold a pool at swimming temperature.
• A heat pump extracts warmth from air, and SEQ winter days are mild — pumps keep working efficiently through the coolest months and simply hold whatever temperature you set.

If your goal is a longer summer, solar does it cheapest. If your goal is swimming in June, only a heat pump (or expensive gas) gets you there. On a new build we usually find a single well-sized heat pump plus a blanket beats running both systems for simplicity and total cost.

Pool blankets: the heating multiplier

Whichever heater you choose, a thermal pool blanket is the single highest-return item on the quote. Evaporation is where pool heat goes to die — it accounts for the majority of heat loss from an uncovered pool — and a blanket can cut that heat loss by up to 50%. A covered pool reaches temperature faster, a smaller pump does the job of a bigger one, winter running costs can drop by hundreds of dollars a year, and you lose less water and chemicals to evaporation.

We install Daisy thermal blankets with rollers, sized to fit your exact pool model, from about $2,190 to $3,140 installed depending on pool size:

• 3mm Daisy Thermal Blanket in Foam Blue with Stainless Steel Roller — $2,190 supplied & installed, suits pools 3–6.5 m (10 models)
• 3mm Daisy Thermal Blanket — $2,540 supplied & installed, suits pools 6–8.3 m (14 models)
• 3mm Daisy Thermal Blanket in Foam Blue with Stainless Steel Roller — $2,840 supplied & installed, suits pools 8–9 m (5 models)
• 3mm Daisy Thermal Blanket in Foam Blue with Stainless Steel Roller — $3,140 supplied & installed, suits pools up to 11 m (1 models)

Live pricing from our quoting system, sized to each pool model in the range.

The roller matters more than it sounds. A blanket that's easy to take off and put back on gets used every day; one you have to drag and fold ends up living in the shed. With a roller, covering the pool is a thirty-second job for one person. Our take: budget for the blanket before you budget for a bigger heat pump — it's the cheaper way to buy the same warm water. For a deeper look at cover types, see our pool covers and blankets guide.

Noise and placement: where the heat pump lives

A modern pool heat pump sounds much like a reverse-cycle air-conditioner outdoor unit — a low fan hum, quieter again on inverter models once the pool is at temperature. Placement still deserves thought at design stage:

• Airflow: heat pumps need clear space to breathe — box one into a tight enclosure and it recycles its own cold exhaust air, and efficiency drops
• Neighbours and bedrooms: keep it away from boundary fences near neighbouring bedrooms and your own entertaining areas
• Plumbing runs: the closer it sits to the filtration equipment, the cheaper the install and the lower the pipe heat loss
• Timing: running it in the warm middle of the day is both the most efficient and the most neighbour-friendly schedule

We design the equipment pad as part of every install, so this is sorted on the plan before anything is dug — one of the details covered at your free site visit and in our installation process.

Plunge pools: the cheap-to-heat loophole

A 3–5m plunge pool holds a quarter to a third of the water of a family pool. Pair one with a 9kW heat pump and a Daisy blanket and you can swim twelve months a year for a few hundred dollars — the most affordable heated-pool setup there is. With installed plunge pools running roughly $45k–$60k, a fully heated year-round plunge pool often costs less than an unheated full-size pool; see our plunge pool pricing guide for the numbers.

FAQs

How much does it cost to add a heat pump to a pool?

Our installed heat pumps currently range from about $4,100 for a 9kW unit to about $10,600 for a 24kW unit — exact live prices are shown above. Installation alongside a new pool build is the cheapest path since the plumbing and electrical runs are done together.

What temperature should a heated pool be?

Most families settle on 26–29°C. Every extra degree adds roughly 10–15% to running costs, which is why a cover matters more than the thermostat setting.

Is a heat pump worth it in Queensland?

For most Brisbane families, yes — it's the difference between a 4–5 month season and swimming most of the year, for roughly the cost of a coffee a day. The maths is best on well-covered pools and compact pools.

How does a pool heat pump work?

It works like an air conditioner in reverse: a fan pulls warmth out of the outside air, refrigerant concentrates it, and a heat exchanger transfers it into your pool water as it circulates through the filter system. Because it moves heat rather than generating it, it typically delivers around five times more heat energy than the electricity it consumes.

Is solar or a heat pump better for heating a pool?

Solar is cheapest to run but fades exactly when you need it — cloudy runs and winter. A heat pump costs more per swim but holds any temperature you set, year-round. In SEQ, choose solar to stretch summer on a budget; choose a heat pump if you want to pick your own swimming season.

What size heat pump do I need for my pool?

Match kilowatts to litres: as a guide, 9kW suits plunge pools, 13kW most 6–7m pools, 19kW large 7.5–8.5m pools, and 24kW family pools of 9m and up. Size up one unit if you want true mid-winter swimming or your pool is shaded or windy — our quoting system sizes the pump to your exact pool model.

Can I add heating to an existing fibreglass pool?

Yes. Heat pumps retrofit easily to any pool with accessible plumbing — book a consultation and we'll size a unit for your pool and quote it exactly.