The renewable energy resources (specifically the solar power ) is one of the main concerned applications to achieve energy efficiency in the whole world. Since Egypt has an excellent solar energy availability with the annual global solar radiation between 900-2600 kwh/m2, [1] therefore, solar thermal technologies are identified as one of the thrust areas for development. Solar Hot Water System ( SHWS) is one of the main solar thermal technologies promoted by the government [1]. This paper is concerned with using the solar power efficiently to generate clean energy in Egypt. It aims to investigate the potentiality of using SHWS in Egypt. The research shed the light in on the specs, the process of designing and the cost benefit of using SHWS in Egypt.