Powder metallurgy has made it easier to develop Ultra high Al-Gr (5 wt% Gr) composite materials for commercial solar thermal collectors. This work seeks an optimum aluminumgraphene composite with superior thermo-mechanical properties for the thermal collector. Experimentally found that an AMMC matrix with 1.0 wt% of Gr has 282 W/mK thermal conductivity, 129 percent developed than Al (123 W/mK), and also found Al+Gr has a lower thermal expansion coefficient than pure Al. Predicted different composite densities and focused to retain 96.5 percent of aluminum density after sintering. Investigated analytical techniques and included some investigation like Raman spectroscopy, X-ray diffraction, FESM, and electricity-dispersive X-ray grain size and property and also identified high-quality composites and predicted their homogeneity and invulnerability. Predicted suitable Sintering temperature was 626 degrees Celsius which increased from 300 degrees Celsius. Energy and thermal conductivity were found that increases with increasing temperature and compared to pure Al. According to this investigation, when increased the graphene weight percentage proportion from 0 to 5.0 wt%. Results show that conductivity increases from 210 to 412 W/mK and mechanical characteristics slightly drop from 16 to 19% as pH rises from 5 to 5.5. Based on this investigation Al+Gr composites may be used for solar thermal collectors and heat sinks and also appropriate ultra-high Al+5.5 wt% suitable for solar collectors.