Abstract : In the present study, experimental analysis of single basin solar still using phase change materials (PCM). In order to improve the distillate, phase change materials have been stored in a copper hexagonal box. The solar still performance should be conducted in two different phase change materials, the first of which is the conventional still. The second is a still with Phase Changing Material (PCM) lauric acid, and the third is a PCM paraffin wax still. With the adjustment of the basins water depths (2 to 6 cm). For all three stills, the effects of basin water depth on total distillate have been studied for all three cases. The maximum distillate has been obtained at 2 cm depth for all cases. Total distillate decreased linearly with water depth for two PCMs. The maximum water basin temperatures in paraffin wax by dropped 10.2 % as compared to lauric acid (17.5 %). For two distinct PCMs, the variation of various heat transfer coefficients with time was also investigated. Total distillate increased by 2060 and 1980 ml/m2-day for paraffin wax and lauriu acid, respectively stored in a copper hexagonal box. The performance of the conventional still was comparable to the other two PCM stills.