People build house pools because they want to enjoy the possibility of having a swim whenever they want. The problem is that, sometimes, the unfriendly weather makes the water so cold, you cannot dip a finger in it. A solution would be a pool heating system, but the costs are far from appealing. However, there is a method of heating the pool without paying thousands of dollars: it’s free, it’s eco friendly, and it works even in the most Nordic areas. We are talking about solar heating systems.
Once you install solar panels to heat the water in your pool, there are no other expenses. The panels will collect solar energy during the daytime and use it to heat your pool. So, as long as you are enjoying direct sunlight, solar panels will continue to maintain a proper pool temperature. If your thinking about fitting a solar heating system in your pool a question you may ask is how many solar panels do I need?
Solar pool heating system efficiency
Before you get started, there are some things you should know about the performance of a solar pool heating system. First, you have to remember that solar panels do not produce energy at night. Therefore, what has been heated during the day tends to become cold again at night. One solution to this problem would be to buy a pool cover, and use it during the night. The cover will maintain the water temperature, so that you can enjoy warm pool water even in the mornings.
Another thing that could influence the performance of the solar heating systems is shading. A shaded pool needs more energy to heat up and maintain that temperature. But if your pool lies directly in the sun, the heating system will have maximum performance.
Weather and climate are other factors to be considered. If you live in a cold climate area, the water tends to cool off very fast.
However, the most important variable is insolation. No matter where you live, if you enjoy many hours of sun per day, a solar heating system is for you.
How to calculate the number of necessary solar panels
All the variables that have been mentioned above could affect, one way or the other, the number of necessary solar panels. As a rule of common sense, the larger the pool, the more solar panels you need. The size of the solar panel and the watts it produces can also influence this calculus.
However, to make an approximation, 2 average size panels should be enough to heat a pool of less than 35000 – 40000 liters. If your pool has between 35000-50000 liters, you might need 3-4 panels. Large pool that have between 50000-70000 liters need about 5-6 panels.