NOVELTY - A rotatable support system (200) includes a foot connected to a column (203) which connected to the stiffener (201) attached to one or more PV modules (250) such as solar panels through at least a rotatable component. The column rotates between folded position and unfolded position, and stops at the unfolded position separated from the folded position by a specific angle difference. The specific angle difference represents the maximum range of rotation of the column.    USE - Rotatable support system for mounting one or more PV modules e.g. solar panels in unfolded and mounted position.    ADVANTAGE - Mounts and supports PV modules such as solar panels with predetermined tilt in unfolded and mounted position. Provide rotatable component that includes a bushing and/or a bearing to improve ease of rotation and/or increase the mechanical load that the rotatable component can support. Enable rotatable component to provide sufficient rotational friction to stay immobile during shipping of the PV module that is attached to the rotatable support system. Provide a column that is sufficiently long enough to support the PV module at desired tilt angle above the substrate, allow airflow behind the PV module for cooling the PV module during operation, allow height above the substrate for vegetation to grow without shading the PV module and allow flood water to flow under the PV module. Provide a low profile, rotatable solar panel support system that can meet various requirements of fixed-tilt solar panel mounting system while reducing installation labor and part count and also improving shipping convenience. Allow shipping of rotatable solar panel support system to the installation location in collapsed state, with one or more spacers nominally parallel with the panel and in the plane of the panel stiffeners, and once at the installation location, one or more spacers are rotated out of the plane of the panel stiffeners to provide support to the panel at the desired angle relative to the horizon.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for mounting one or more PV modules e.g. solar panels in unfolded and mounted position.    DESCRIPTION OF DRAWING(S) - The drawing shows the perspective view of the rotatable support system for mounting one or more PV modules in unfolded and mounted position.    Rotatable support system (200)    Stiffener (201)    Column (203)    Substrate (206)    PV modules (250)