How to heat a house with solar thermal energy
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The thermal solar panels or also known as solar collectors perform the function of capturing thermal energy from the sun to heat a fluid.

Solar panels forced circulation and of thermosyphonare the two most common types of collectors; Both have a heat accumulator, a heat exchanger and the most important part of the system is the panel or collector where heat energy from the sun is recovered with temperatures ranging from 40 ° C to 50 ° C and above, depending on the type.

If you want to know which system is best for your home, there are some considerations you need to take and compare one system to another.

A thermosiphon solar panel: It is the most common and the most economical on the market because it takes advantage of the energy to heat the water in an adjacent tank installed above it, they help to heat the water of swimming pools or the water for home use.

Advantages of thermal solar panels.

  • Its installation is very simple and fast.
  • They take up very little space and are always on the roof.
  • They do not require electricity so your investment is the first, the cost of the product and the installation.
  • It has a reasonable price between 1000 and 3000 euros.

Disadvantages of thermal solar panels.

  • It generates reasonable losses like any heat transfer system.
  • Exposed to bad weather.

System characteristics:

Flat solar collector of approx. 2.06 m2.

Yield of 75.5%.

Water tank of 150 liters or more.

Forced circulation solar panel.

It is a system similar to the thermosiphon in everything, except that it has a pump that circulates the water that has already been heated to a heat exchanger, to be placed in an accumulator and which is used while the water is being heated. cold is transferred to the thermal panel to be heated.

System elements: as mentioned previously, an accumulator tank, expansion tanks, impulse pumps and control accessories.


  • It requires electricity.
  • It is much more expensive from 2000 to 4000 euros.
  • Its installation is a little more complicated.


  • Less heat loss in the accumulator.
  • Recommended for collector surfaces greater than 80 m2.
  • Less losses in the consumer circuit, whether at home or in business, where the distances to be covered are very long.

Therefore, we can say that the forced circulation system is more suitable for industrial and larger areas, while the basic thermosyphon system for home use, and in terms of efficiency, the forced system is better, but only thanks to to the use of electricity.

Compare the two systems and choose the best for you!