NOVELTY - The system (10) has two bracket assemblies (40) that are to be fastened to an exterior wall (100). Two attachment clips (16) are fastened to the assemblies by a threaded fastener (48). A C-shaped member of two tile perimeter strips comprising a planar surface is resided along a rear surface of rigid wall panel (32). A receiving member is integrally attached to the C-shaped member and includes a slot adapted to engage and interlock wing members of the clips for operatively connecting the panel to the clips and to the wall, where the system allows the wall panel to be secured to the assemblies.    USE - PV wall panel system for attaching multiple PV wall panels to an exterior wall of a building.    ADVANTAGE - The system comprises panel stiffeners positioned behind or on a rear surface of the wall panels, and can be placed behind or inside a hollow interior portion of aluminum wall panels, so that the panel stiffeners reinforce the aluminum wall panels and prevent deforming or popping of the aluminum wall panels. The rigid panels are adhesively connected to the tile perimeter strips, and the system is held together non-adhesively, so that the system is ventilated partially through multiple rivets to permit ingress and egress of air and moisture, thus providing a pressure-balanced and moisture-drained interior environment. The system comprises a sheet steel that is picture framed along and within the perimeter strip and provides back support for ceramic tiles, so as to prevent the tiles from shattering in the unlikely event that some object strikes the tile after the system has been installed on the side of a building, and breaks the tile.    DETAILED DESCRIPTION - The clips are made of aluminum. The bracket assemblies are made of steel. The wall panel is a photovoltaic (PV) rigid wall panel.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a PV wall panel system.    PV wall panel system (10)    Attachment clips (16)    Rigid wall panel (32)    Bracket assemblies (40)    Threaded fastener (48)    Exterior wall (100)