NOVELTY - Photovoltaic (PV) module support assembly (306) has external corner surfaces, module registration member and a base. Module registration member engages the PV module external surfaces to properly position it on the support. Mounting element secures the PV module (302) to the base and the frame support. Base has a support pad with threaded bolt forming a thermal expansion and contraction joint on the lower edges (340). Frame support has mounting elements (322) for an air deflector (308). Air deflector supports the PV module by counteracting the effects of the wind.    USE - For supporting photovoltaic modules for tilted or angled PV assemblies, and even for flat or horizontally oriented PV assemblies.    ADVANTAGE - The lightweight photovoltaic support assembly eliminates the need for additional roof strengthening and roof membrane to support the array. The relatively lightweight photovoltaic (PV) support assembly can be mounted directly to a roof or other support surface without roof penetrations, using a minimal number of parts, simple tools and with a straightforward installation process. Through the appropriate design of the support assemblies, the support assemblies and the PV modules can be shipped to the user separately to limit the amount of handling required. This helps reduce the number of times the support assemblies must be shipped, reducing cost as well as carbon dioxide emissions during transport. The PV modules are simultaneously mechanically interlocked and electrically grounded by the mounting elements.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for    (1) method of mounting a photovoltaic module;    (2) photovoltaic installation    DESCRIPTION OF DRAWING(S) - The drawing illustrates an exploded isometric view of a supported PV assembly.    A supported PV assembly (302)    PV module support assembly (306)    Air deflector (308)    Upper edge of deflector (310)    Upper edge of PV module (312)    Mounting elements (322)    Lower base edge (340)