This research aims to study the effect of adding alloying elements and heat treatment of Zinc metal on solar energy absorbing , nine alloys ingots were manufactured by changing the percentages of added Aluminum and Copper on the pure Zinc, and these ratios of Aluminum were : (10% , 20% , 30% , 40 % , 50%) to demonstrate the effect of adding Aluminum to Zinc metal on solar energy absorbing , and ratios of copper were : (20% , 40%) , as well as we prepare two pure zinc samples with 99.2% of purity , one was rapidly cooled and the other slowly cooled , to demonstrate the effect of heat treatment on solar energy absorbing . In order to measure the solar energy absorbing for prepared samples , we manufactured a device depends on the methods of heat exchange between solar radiation and the surface exposed to radiation . The obtained results showed that adding Aluminum and Copper to the pure Zinc caused a decrease in solar energy absorbing . As well as increasing the percentages of adding Aluminum and Copper to the pure Zinc caused a gradually decrease in solar energy absorbing . comparing the absorbing of pure zinc samples, one was rapidly cooled and the other slowly cooled , the results showed that the sample was rapidly cooled was better than the sample slowly cooled on solar energy absorbing .