NOVELTY - The photovoltaic module configured as a roofing tile for power installations, comprises a module front layer (12) having a glass plate, a module back layer (20) having an electrically conductive metal foil such as a flexible sheet of material, and non-silicon based amorphous solar cells (16) arranged to be protected by the front and back layers. The foil is electrically grounded and anodized on sides to improve high voltage withstand, has a cross-sectional thickness of 100-150 microns and an externally exposed surface, and includes an outer protective layer.    USE - The photovoltaic module configured as a roofing tile is useful for power installations (claimed).    ADVANTAGE - The photovoltaic module is low cost and reliable, can be easily installed, and creates much greater market penetration and commercial adoption for large scale power installations.    DETAILED DESCRIPTION - The photovoltaic module configured as a roofing tile for power installations, comprises a module front layer (12) having a glass plate, a module back layer (20) having an electrically conductive metal foil such as a flexible sheet of material, and non-silicon based amorphous solar cells (16) arranged to be protected by the front and back layers. The foil is electrically grounded and anodized on sides to improve high voltage withstand, has a cross-sectional thickness of 100-150 microns and an externally exposed surface, and includes an outer protective layer, an outer moisture barrier layer and an outer corrosion protection layer. The foil and the glass plate are similar in size. The foil is set at the voltage potential of flexible or rigid solar cells of the module via an electrical connection and separated from the solar cells through a pottant layer (14, 18) having a thickness of 25-500 microns and dielectric resistance to withstand 3000 V between the solar cells and the foil. The pottant layer is positioned to prevent direct contact between the solar cells and the glass plate. A mesh layer having a thickness of 50-200 microns is used in combination with a pottant layer, and comprises a fiberglass layer and borosilicate glass cloth located closer to the solar cells than the conductive foil. A moisture barrier containing desiccant is positioned between the glass plate and the conductive foil to prevent moisture entering between the glass plate and the foil, and extends around an entire perimeter of the glass plate. Spacers including particles, fibers and/or meshes are uniformly arranged between the front layer and the back layer to maintain a minimum spacing between the glass plate and the electrically conductive foil, have circular, square, rectangular, triangular, oval, hexagonal, polygonal and/or star shape and 0.4 mm diameter, and comprise spheres positioned both above and below and electrical lead exiting between the glass plate and the conductive foil. The spacers remain hard and incompressible at temperatures of 150 degrees C and pressures of 0.1 MPa and maintain a minimum separation of 0.9-1.1 mm, and are spaced about 1 per 10 mm2 at exit locations of the electrical lead from the module. The solar cells have a thickness of less than or equal to 500 microns, and an absorber layer. The absorber layer has materials of an oligimeric material, micro-crystalline silicon, inorganic nanorods dispersed in an organic matrix, inorganic tetrapods dispersed in an organic matrix, quantum dot materials, ionic conducting polymer gels, sol-gel nanocomposites containing an ionic liquid, ionic conductors, low molecular weight organic hole conductors, C60, a nanostructured layer having an inorganic porous template with pores filled by a doped or undoped organic material, a polymer/blend cell architecture and/or a micro-crystalline silicon cell architecture. Mounting clips are coupled to the module to secure it to an external support, and have a first surface that engages the glass plate front layer and a larger second surface that engages the foil back layer. The module has a weight of less than or equal to 14 kg, a length of 1640-1680 mm and a width of 700-870 mm. The glass plate has a thickness of 4-6 mm, and comprises solar glass that is transparent in a spectral range of 400-1100 nm. Edge connectors are mounted along the periphery of the module to allow the electrical connectors to exit between the glass plate and the conductive foil while minimizing moisture entry. First and second electrical leads extend outward from the photovoltaic cells without passing the lead through a central junction box respectively. Corner protectors are arranged to seal the glass plate and conductive foil at the corners. Mounting brackets are attached on four locations of the module. A by-pass diode is present in an edge connector. An INDEPENDENT CLAIM is included for a method for forming and installing photovoltaic modules.    DESCRIPTION OF DRAWING(S) - The figure shows an exploded perspective view of a module.    Transparent module front layer (12)    Pottant layer (14, 18)    Solar cells (16)    Module back layer (20)    Vertical portions. (22)