Photovoltaic system, with - a plurality of photovoltaic modules, which can be arranged in series and mounted on a support frame, - wherein adjacent photovoltaic modules with their support frames are connected to one another in an articulated manner by means of joints, and can be transferred from an essentially extended, flat or slightly inclined state, into a pushed-together, compact state, and vice versa, - a support structure for the photovoltaic modules, and - a drive unit to transfer the photovoltaic modules from the compact into the extended state, and vice versa, - wherein the support structure comprises a first pair of guide rails consisting of two guide rails arranged at a separation distance from one another, and guide elements are arranged laterally on the photovoltaic modules and on the support frames respectively, the mutual separation distance between which corresponds to the separation distance between the opposing guide rails, a turning section and a storage section are connected to the guide rails, wherein the storage section is dimensioned such that the photovoltaic modules can be arranged vertically next to one another, and the turning section is designed to transfer a support frame, with the photovoltaic modules arranged thereon, from the vertical to an essentially horizontal, or slightly inclined, position, and vice versa, characterised in that, the support frames of the photovoltaic modules in the storage section are arranged freely suspended on the guide rails, and the guide elements are running wheels that can freely rotate, and in addition at least one, and preferably two, running rollers that can freely rotate, whose axes of rotation extend at right angles to a plane passing through the guide rails, and serve to guide the photovoltaic modules laterally on the carriage, such that the photovoltaic modules can be expanded or moved together in the direction of the guide rails with only slight rolling resistance. - a plurality of photovoltaic modules, which can be arranged in series and mounted on a support frame, - wherein adjacent photovoltaic modules with their support frames are connected to one another in an articulated manner by means of joints, and can be transferred from an essentially extended, flat or slightly inclined state, into a pushed-together, compact state, and vice versa, - a support structure for the photovoltaic modules, and - a drive unit to transfer the photovoltaic modules from the compact into the extended state, and vice versa, - wherein the support structure comprises a first pair of guide rails consisting of two guide rails arranged at a separation distance from one another, and guide elements are arranged laterally on the photovoltaic modules and on the support frames respectively, the mutual separation distance between which corresponds to the separation distance between the opposing guide rails, a turning section and a storage section are connected to the guide rails, wherein the storage section is dimensioned such that the photovoltaic modules can be arranged vertically next to one another, and the turning section is designed to transfer a support frame, with the photovoltaic modules arranged thereon, from the vertical to an essentially horizontal, or slightly inclined, position, and vice versa,