NOVELTY - The solarthermal collector comprises a housing, which is partially or completely transparent for radiation in the infrared and/or visible region of the electromagnetic spectrum, an absorber (2) arranged inside the housing to convert sunlight into thermal energy, a heat transfer device for the evacuation of usable heat, and a thermal insulation panel such as a vacuum insulation panel. A working material and an adsorbent (5) for the working material are arranged inside the housing. The solarthermal collector further comprises a partly or completely transparent cover (3).    USE - The solarthermal collector such as a facade collector and/or roof collector is useful for: the generation of warm water; the temperature rise of another liquid and/or warm air; heating buildings; drying building; providing process heat for bakeries, electroplating plants, laundries or paint shops; drying of foodstuffs, chemical products, wood and/or pellets; and for the operation of thermally driven chillers such as sorption chillers (all claimed).    ADVANTAGE - The solarthermal collector can be economically fabricated with high temperature stability and efficiency and low calorific loss.    DETAILED DESCRIPTION - The solarthermal collector comprises a housing, which is partially or completely transparent for radiation in the infrared and/or visible region of the electromagnetic spectrum, an absorber (2) arranged inside the housing to convert sunlight into thermal energy, a heat transfer device for the evacuation of usable heat, and a thermal insulation panel such as a vacuum insulation panel. A working material and an adsorbent (5) for the working material are arranged inside the housing. The solarthermal collector further comprises a partly or completely transparent cover (3) for the radiation in infrared and/or visible region of the electromagnetic spectrum, a gas space (4), a rear cover (9), and a solar cell that is deposited, coated or glued on a surface of the absorber. The adsorbent and the working material are matched so that an increase in the temperature of the collector leads to a desorption of the working material from the adsorbent and a lowering of the temperature of the solarthermal collector leads to sorption of the working material through the adsorbent. The absorber comprises a transparent heat insulation panel. The adsorbent is deposited or integrated: as a layer or points in the thermal insulation panel at a side facing the heat insulation panel of the absorber; in a separate compartment that stands in communication with the thermal insulation panel; at any position in the collector housing; and on the absorber at a side facing away from the gas space. The solarthermal collector is designed as a flat collector, an evacuated flat plate collector or an evacuated tube collector. The evacuated tube collector comprises a tube consisting of completely transparent material such as glass and/or a polymer material for radiation in the infrared and/or visible region of the electromagnetic spectrum, where the absorber is arranged inside the tube. The heat transfer device comprises a liquid heat distribution medium or a heat pipe.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross-sectional view of a solarthermal collector.    Absorber (2)    Transparent cover (3)    Gas space (4)    Adsorbent (5)    Rear cover. (9)