NOVELTY - Attaching (M1) a solar module assembly to a substrate on a roof involves obtaining a fully assembled solar module assembly, where the solar module assembly includes a front surface and a back surface; applying at least one discrete strip of adhesive to a top surface of the substrate; placing the back surface of the solar module on top of the at least one discrete strip of adhesive such that the front surface of the solar module is fully exposed; and pressing the back surface of the solar module assembly into the at least one discrete strip of adhesive.    USE - For attaching a solar module assembly to a substrate (where the substrate is a flat rack) on a roof (where the roof is one of ethylene propylene diene terpolymer (EPDM), thermoplastic olefin (TPO), polyvinyl chloride (PVC), styrene-butadiene-styrene (SBS) modified bitumen, atactic polypropylene (APP) modified bitumen, galvanized steel, aluminum, stainless steel, and painted steel that includes polyvinylidene fluoride (PVDF)) (claimed).    ADVANTAGE - The method uses an adhesive to maximize strength, weatherability, and ease of application; and provides a universal method of application that allows any solar module to be securely attached to any roofing substrate.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following    (1) a solar pre-assembly (A1) comprising: a solar module, a roofing membrane having a top side and a bottom side where the bottom side including a fleece layer having several fibrous materials, and an adhesive layer disposed between and adhering the solar module to the top side of the roofing membrane;    (2) an installed solar module assembly (G1) comprising an insulation board including a top side and a bottom side where the bottom side is adhered to a substrate of a roof, a roofing membrane having a top side and a bottom side where the bottom side includes a fleece layer having several fibrous materials, a urethane adhesive layer adhering the top side of the insulation board with the bottom side of the roofing membrane where the urethane adhesive layer at least partially permeates the fleece layer of the bottom side of the roofing membrane, a solar module and a second adhesive layer disposed between and adhering the solar module to the top side of the roofing membrane.