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DIY Solar Kits

A solar pool heating system is quite simple in it's operation. Water is pumped from the spa or swimming pool through a multi tube solar collector, which is generally mounted on your house roof and then back to the pool. As the water passes through the solar collector it is warmed by the sun.

A Differential Thermostat, known as a Controller, switches the water pump on or off by determining the difference between the temperature on the roof and the temperature of the pool water. The Controller also has a temperature control knob enabling a desired pool water temperature to be set when there is sufficient heat available.

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Typical solar set-up's

Open the diverter valve and run filter pump in the normal way. Close diverter valve to send water through the solar system. Air will be purged from the system back into the pool.
If the filter pump has excess capacity then this valve need only be partially closed, allowing sufficient water to pass through the system and the rest to pass directly into the pool. This eases the pressure imposed on the filter and increases filtration turnover.

The position of the valve should be marked for future reference.

Sufficient water for the system is best assessed on a sunny day: The system should run with an outlet temperature of a maximum of about 2°-4° above inlet temperature (pool temperature)

Run the filter pump in the normal way.
Turn on the solar pump by turning on the solar controller.
Air will be purged from the system back into the pool.
It is essential that the solar pump run only when the filter pump is also running.
This is achieved by using the same power outlet for both the filter pump and solar controller (which energises the solar pump).
This power outlet would normally be time clock controlled, with the time clock set to run between say 9.00am and 5.00pm.



Step 1: Using the guide at right, calculate the approximate surface area or your pool.

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

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%.
Step 3: Multiply your pool surface area by percentage of area required. Note: By 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)


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