How much solar collector do I need to heat my pool?
Calculating the amount of solar collector require to heat your pool isn’t as difficult as you might think. As most of a pools heat is lost from the surface of the pool, this is what is used to determine the size of the solar pool heating system. Basically, the required amount of solar collector should equal 60% to 100% of the surface area of the pool – depending on your location and requirements.
In Australian Southern states, the recommended amount of collector is approximately 80% to 100% of the surface area of the pool. In the Northern states, the recommended amount of collector is approximately 60% to 70% of the surface area of the pool. This may be scaled up or down depending on several factors including:
- your expectations – are you expecting higher than average temperatures? You may wish to size up
- the collector’s orientation –if the system isn’t North facing you may wish to size up
- if you have a pool blanket – If not, then you may want to consider installing more solar collector
- the amount of shading – try to avoid heavy shading, a degree of shading can be compensated by installing more solar
- wind exposure – if your pool is in a windy location you may wish to size the solar system up
The solar coverage ranges stated above (80-100% and 60-70%) are the minimum amount of solar collector required to heat your pool. If you have a lot of roof space available you may as well take advantage of it! Larger solar pool heating systems will have you in your comfortably heated pool for more time of the year. Have a look at our online calculator for an estimate on your heating season and cost. The next section will help you to calculate the surface area of your pool.
Calculating your Pools Surface Area
Below are some formulas for calculating your pools surface area (m2). Make sure you include your pools step area in the calculation of your pools surface area (m2)
Round Pools: Radius x Radius x 3.142
Rectangle Pools: Pool Length x Pool Width
Oval Pools: ½ Pool length x ½ Pool width x 3.142
Kidney pools: (Pool Width (Short End) + Pool Width (long end)) x Pool length x 0.45
However, as we all know some pools are a bit more complicated. The next section may provide a solution for these pools.
Complicated pools: The surface area of complicated pool shapes can also be calculated using Google Earth (link: https://earth.google.com/web/). Simply search for your address using the magnifying glass, zoom in and press the ruler on the left-hand side of the screen. You can then use your mouse to trace around the pool perimeter, clicking as you go. Once finished, the perimeter and surface area will appear in the right-hand corner of the screen. You can then use this to determine the amount of solar collector required.
Calculating the Solar Collector
Once you have selected the percentage of solar collector you require (from 60% to 100%) and determined the surface area of your pool, you can calculate the amount of solar collector you require. For example, if your pool is 28m2 and you live in Queensland, you may determine that you only require 60% solar coverage. Therefore the amount of solar collector you require is 16.8m2.
The team at Boss Solar hope you enjoyed these tips and will find them useful. If you are looking to purchase, update or repair a solar pool heating system anywhere in Australia or are looking for some advice, the team at Boss Solar are ready to help you. We can help you find the pool heating system that best suits your needs. Give us a call on 1300 786 489 or email [email protected]