NOVELTY - The system has multiple racks (14) for supporting two rows of solar modules (12). Multiple clamps (16) clamp the solar modules with inclined upper and lower mounting surfaces of the racks. Each clamp is provided with a pair of oppositely-extending flanges. One of the flanges is connected with one of the respective pair of adjacent solar modules. The other flange is connected with the other respective pair of adjacent solar modules. Each flange is formed with a hole for providing integrated grounding between the solar modules of the respective pair of adjacent solar modules.    USE - Solar racking system for mounting an array of solar modules on roof and ground areas to form a photovoltaic array.    ADVANTAGE - The rack is provided with a tray with a rounded peripheral edge so as to eliminate sharp edges, so that damage to the roof or other structure on which the rack is installed, can be prevented. The rack is formed with drainage holes to allow water to drain from a tray so as to eliminate or reduce water weight on the rack, so that damage to the rack caused by the water weight is avoided. The system is easy to install with a single tool, thus saving time and energy during installation. The rack and clamps are inexpensive. The system provides an integrated grounding between solar modules and grounding through an array of solar modules so as to provide a positive ground throughout photovoltaic array, so that the need for installing a separate grounding wire and lugs into the solar module array is avoided, thus saving copper wire, ground lugs, and installation time. The clamp can be easily clicked into place within the slot of the rack so as to reduce number of racks and connections, so that installation time and cost are reduced. The rack enables stacking of multiple racks so as to reduce shipping and handling costs, thus allowing shipping of large quantities of racks at the same time.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a photovoltaic array comprising solar modules mounted to a low sloping roof by a solar racking system.    Photovoltaic array (10)    Solar modules (12)    Opposed long sides of solar modules (12a)    Racks (14)    Clamps (16)