KW Solar, S.L., Renewable Energy products

The "compact" systems have the solar collector and the water tank together. It is a passive system, which means that no pump or other external devices are necessary. It is a very good solution, if we do not have electricity available. The water is heated up directly by the solar collector, with almost no losses in the heat transfer from the solar panel to the water storage tank. The compact system is more simple (less components) and economical than a pumped one.

In this type, the solar panel is usually mounted on the roof of the house, and the water tank is positioned somewhere inside the house, preferably as near as possible to where the hot water is finally used. A mains powered circulation pump is used to transfer the solar fluid between the solar panel and the water storage tank, transferring the heat from the solar panel to the water. A controller is required, which measures when the solar fluid is hotter in the panels than in the tank and puts the pump into operation.