incorporated in a thermal solar panel fig8 illustrates schematically an example of a thermal solar panel incorporating an absorber in this figure the geometric shapes have been illustrated schematically in the form of a disc for simplification the absorber 40 is arranged in a frame 72 and covered on the top by a glass plate 70 giving a greenhouse effect between the latter and the preferably blackened upper plate of the absorber the thermal solar panel also comprises a mechanism ensuring circulation of heat bearing fluid in the absorber between the first inlet end fitting of the liquid and second outlet end fitting means for evacuating heat bearing fluid once heated through the absorber as this mechanism is not directly associated with the principle of the present invention it has not been shown here according to an advantageous variant embodiment the lower plate of the absorber is supported by inner rims of the panel by way of remarks it is clear that using copper as metal for the upper plate has the advantage of being a good conductor having good heat yield also copper can be more easily fitted which makes geometric shapes with greater relief thus increasing the volume of heat bearing fluid.