A system for positioning a row of photovoltaic solar panels on a support structure arranged in an outdoor space, said system comprising: - a vehicle, on which the photovoltaic solar panels to be positioned are arranged, - a manipulator robot arranged on-board the vehicle to pick-up one or more photovoltaic panels from the vehicle and to position them on said support structure, wherein: - the robot is provided with a controller programmed for picking-up and positioning said row of photovoltaic solar panels in succession by means of said robot while the vehicle gradually moves on one side, and along, said support structure, by causing each photovoltaic solar panel to have an approaching movement towards the support structure, in such a way that at the end of this movement, each photovoltaic solar panel is already in its final position along said row, and wherein the manipulator robot is equipped with an optoelectronic system, said system being characterized in that the aforesaid vehicle is provided with a cover that protects the robot and the photovoltaic solar panels carried by the vehicle, and which has a portion movable between a position retracted within the vehicle structure and an extracted position protruding at least on one side of the vehicle to create a protected chamber above the positioning area of each photovoltaic solar panel and characterized in that the optoelectronic system is configured for automatic optical recognition of both the correct position for picking-up a photovoltaic solar panel to be installed, and of the correct position of the photovoltaic solar panel on the support structure. said system comprising: - a vehicle, on which the photovoltaic solar panels to be positioned are arranged, - a manipulator robot arranged on-board the vehicle to pick-up one or more photovoltaic panels from the vehicle and to position them on said support structure, - a vehicle, on which the photovoltaic solar panels to be positioned are arranged, - a manipulator robot arranged on-board the vehicle to pick-up one or more photovoltaic panels from the vehicle and to position them on said support structure, wherein: - the robot is provided with a controller programmed for picking-up and positioning said row of photovoltaic solar panels in succession by means of said robot while the vehicle gradually moves on one side, and along, said support structure, by causing each photovoltaic solar panel to have an approaching movement towards the support structure, in such a way that at the end of this movement, each photovoltaic solar panel is already in its final position along said row, and - the robot is provided with a controller programmed for picking-up and positioning said row of photovoltaic solar panels in succession by means of said robot while the vehicle gradually moves on one side, and along, said support structure, by causing each photovoltaic solar panel to have an approaching movement towards the support structure, in such a way that at the end of this movement, each photovoltaic solar panel is already in its final position along said row, and wherein the manipulator robot is equipped with an optoelectronic system, said system being characterized in that the aforesaid vehicle is provided with a cover that protects the robot and the photovoltaic solar panels carried by the vehicle, and which has a portion movable between a position retracted within the vehicle structure and an extracted position protruding at least on one side of the vehicle to create a protected chamber above the positioning area of each photovoltaic solar panel and characterized in that the optoelectronic system is configured for automatic optical recognition of both the correct position for picking-up a photovoltaic solar panel to be installed, and of the correct position of the photovoltaic solar panel on the support structure.