NOVELTY - The apparatus has hoses (8) filled with water as a coolant (9) and optionally made of silicone rubber. A thermally conductive metal surface is provided with a retention device i.e. support rail (15), which stands in an intensive contact with the hoses. The metal surface is resiliently connected to solar cells (1) over highly electrically insulating and thermally conductive thin separating layers. An air layer (13) having thickness in a range between 3 and 12 mm, is arranged between the solar cells and a covering glass (14) such that the solar cells are not in direct contact with the glass.    USE - Solar power recovery apparatus i.e. photovoltaic-thermal hybrid solar heat collector, for use in an installation system (claimed) for simultaneous recovery of solar power in thermal and electrical forms.    ADVANTAGE - The air layer having the thickness in the range between 3 and 12 mm, is arranged between the solar cells and the covering glass such that the solar cells are not in direct contact with the covering glass, thus a need for an omega-shaped part of a cooling section is avoided, and hence reducing manufacturing effort and minimizing noise emission. The apparatus is designed such that corrosion of the apparatus is prevented. The design of apparatus reduces differences in temperature between the solar cells and the coolant to a range less than 15 degree Celsius, thus reducing utilizable temperature and/or cell temperature, and hence increasing current efficiency.    DETAILED DESCRIPTION - The highly electrically insulating and thermally conductive thin separating layers consist of a lamination layer (4), an insulating layer (5) and an anodized layer (6). An INDEPENDENT CLAIM is also included for an installation system.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic sectional view of a profile of a cooling section with glasses and an air gap.    Solar cells (1)    Lamination layer (4)    Insulating layer (5)    Anodized layer (6)    Hoses (8)    Coolant (9)    Air layer (13)    Covering glass (14)    Support rail (15)