Solar water heaters integrated with materials having capacity to store solar energy inform of latent heat have been studies and developed to improve the performance characteristics of the system. Phase changing materials generally have lower value of thermal conductivity, which directly affect the solar energy storage effectiveness in solar water heater. A lot of research have been performed to enhance the thermal conductivity and energy storage efficiency of PCMs. Different PCMs encapsulation have been adopted to improve the overall performance of solar water heater. In the current study, solar water heater with different combination of Phase Change materials have been comprehensively examined. Most commonly used PCM material is found to be paraffin wax. PCM with Nano particles have shown better results over pure PCM and without PCM.