A well-engineered solar roof tiles mounting system is presented here by eliminating the drawbacks associated with the solar roof. A comprehensive literature review is conducted here and identified the inconstancies like a gap in research in the area of solar roof mounting units, conflicts in previous studies, and open questions left from another research. Innovated design presented here is easy to install and can accommodate a range of solar tiles manufactured by leading manufacturers. The design also solved the roof leaking issues, tilting of the tiles, and corrosion of mounting units by design optimization and proper material selection. The proposed design is demonstrated with engineering calculations, drawings, simulation results, prototypes test results and future recommendations.