NOVELTY - The support structure (4) for a stationary photovoltaic system (1), comprises a support part, which comprises securing points for a flat photovoltaic unit (2) and a drive device for the driven adjustment of the support part, a connection- and control device, and a single-axis adjusting device, which adjusts a photovoltaic unit and is secured to the support part, in azimuth and elevation about adjustable axis between setup position (35) and end position, where the projection of the surface normals of the photovoltaic-unit on the horizontal plane in the setup position defines a setup axis (E).    USE - Support structure useful for a stationary photovoltaic system.    ADVANTAGE - The support structure can be economically manufactured with less effort.    DETAILED DESCRIPTION - The support structure (4) for a stationary photovoltaic system (1), comprises a support part, which comprises securing points for a flat photovoltaic unit (2) and a drive device for the driven adjustment of the support part, a connection- and control device, and a single-axis adjusting device, which adjusts a photovoltaic unit and is secured to the support part, in azimuth and elevation about an adjustable axis between a setup position (35) and an end position, where the projection of the surface normals of the photovoltaic-unit on the horizontal plane in the setup position defines a setup axis (E) and the projection of the adjusting axis on the horizontal plane defines a projected adjusting axis, where the projected adjusting axis to the setup axis forms an angle in the region of 10-60 degrees . The support structure comprises two different longitudinal stayers on which the both adjusting devices, a 3D-joint and coupling device are arranged. The coupling device is arranged with corresponding coupling element over which both adjusting devices are coupleable with the support part. A locking device is provided, which is alternately lockable and unlockable respectively corresponding to the coupling element of the coupling device. The coupling elements of the coupling device are arranged on the stayer and/or the connection- and control device and/or the 3D-joint are arranged on the other stayer and/or the stayer has triangular form and/or square form and/or both stayer comprise a strut. Mounting locations are provided for fixing the photovoltaic unit, where the support structure is flat folding. A bottom structure is provided, which is partially embedded into flat structure embedded into the bottom, which stands in connection with the bottom structure in the assembled state so that forces acting on the flat structure are transferable from the last of the bottom material for safe fixing of the bottom structure in the bottom on the bottom structure. The flat structure is flexibly formed. Second single-axis adjusting device is provided that is formed on the first adjusting device, where the support part is coupled alternately with the first adjusting device and the second adjusting device. The pivoting area of the first adjusting device and the second adjusting device is arranged with reference to the setup axis of mirror graphic. The drive device comprises a joint drive for both adjusting device. The drive is formed as a linear drive of the drive device. The linear drive of the driving device comprises a piston-cylinder-unit. A swivel causes the support part over the first adjusting device from a draft of the support part of the coupling element of the second adjusting device and the swivel causes the support part over the second adjusting device of the draft of the support part of the coupling element of the first adjusting device. A place is distanced on which the drive device of the support part drives to the place such as all places on which the adjusting device adjusts the support part. An INDEPENDENT CLAIM is included for a stationary photovoltaic-system.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of a stationary photovoltaic system.    Setup axis (E)    Stationary photovoltaic system (1)    Photovoltaic unit (2)    Support structure (4)    Setup position. (35)