Solar pool heating. Do it Yourself Kits

Hydromatt solar heating kits are made right here in Australia, suitable for Australian climates and pools.

How does a Solar Pool Heating System Work?

A solar pool heating system actually works pretty simply. Water is pumped from the spa or swimming pool through a multi-tube solar collector (usually mounted on your house roof) and then back to the pool. The water gets warmed by the sun as it moves through the tube.

How hot can solar pool heating get?

Solar heating may raise your pool water temperature by up to 10 degrees celsius. Using solar heating together with a pool cover will allow your pool water to heat up faster and stay warm for longer.

Does solar heating work on cloudy days?

Yes, some energy is available even on cloudy days. The HYDROMATT solar absorber offers a maximum surface area to catch and retain that energy. Here is a guide showing how a solar pool heating system can extend your swimming season:


Without Solar Heating

With Solar Heating


2 months

4-6 months


3 months

7-9 months


4 months

8-10 months


3 months

7-9 months


2 months

4-6 months


9 months

11 months


2 months

4-6 months

Is my roof suitable for solar heating?

Generally the solar heating unit will not take up much of your roof area. Tile, metal, fibro, corrugated iron & most other roofing surfaces are suitable. Flat, northerly or westerly surface of a sloping roof is best.

How long will a solar pool heating system last?

Our Hydromatt collector is virtually immune to ultraviolet radiation and ozone, it is dimensionally stable over a wide temperature range and is highly resistant to pool chemicals or additives. The unit is expected to last on a roof for approximately 25-30 years.

What size solar pool heating kit do I need?

To calculate the pool kit size that you will require follow the steps below:

  1. Using the guide below, calculate the approximate surface area or your pool
  2. Step 2: Determine the percentage of collector required taking into account the following:  * Available roof size  * Northern states minimum 60% to 100% +. * Southern states minimum 80% to 100% +.  * Coloured collector add 20%. 
  3. Step 3: Multiply your pool surface area by percentage of area required. Note: Installing additional collector up to 100% & more will improve your heating efficiency.

Calculation Example: Round Pool 7 Metres in Diameter 80% coverage required.

7 x 7 x 79% = 38.71 square metres x 80% = 30.96 Square kit 

(You select the closest kit size form the listings below)


Round Pool: Pool diameter x Pool diameter x 79%

Oval Pool: Pool length x Pool width x 90%

Rectangle Pool: Pool length x Pool width

Also available:

For some more useful information on heating your pool efficiently, check out our blog post 'How to Make Your Pool Heating More Efficient'.