NOVELTY - The method involves identifying a target site above a roof deck. A solar roof panel assembly is fastened to the roof deck at the target site such that an air gap is created between the solar roof panel assembly and the roof deck. An electrical connection element is electrically connected to a building structure electrical system, where the solar roof panel assembly comprises a metal roof panel base, stone coating, a solar cell, an electrical junction box positioned on the back surface and the electrical connection element extending from the electrical junction box.    USE - Method for installing a photovoltaic or solar roof panel assembly e.g. building-integrated photovoltaic (BIPV) roof panel assembly and previously-installed roof panel assembly such as decra (RTM: original stone coated steel roofing system) roofing system roof panel, for construction or retrofit installation above a roof deck of a building structure. Can also be used for decra (RTM: original stone coated steel roofing system) roofing system tile panel, decra (RTM: original stone coated steel roofing system) roofing system shake panel and decra (RTM: original stone coated steel roofing system) roofing system shingle plus panel.    ADVANTAGE - The method allows the solar cell to be covered with a sheet of glass or transparent or translucent material, thus allowing light to pass through, while protecting the solar cell from damage due to rain, hail, wind-driven debris and hazard. The method enables forming a basecoat by applying an acrylic resin binder that serves as adhesive that can bond stone coating to base metal, thus protecting underlying material from water and UV light. The method enables providing stone coating so as to provide protection from water and UV light and to provide improve appearance of the assembly.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a solar roof panel assembly.    Solar roof panel assembly (100)    Solar cells (142)    Electrical connection elements (152)    Overlap portion (170)    Underlap portion (172)