The solar water heating system is specially designed for hot water supply for a house or apartment. As it uses a pump with a controller to circulate the fluid in the system, the storage tank and collector are separated. While the collector is integrated into the roof of the building, the tank, the solar centre and the controller are installed inside of the building. The piping between the components is made by copper and a special insulation with high temperature resistance is used for the solar system. To enable the use capability of the system in winter period, an anti-freezing function in the controller has been implemented.