The thermosyphon system works using the force of gravity. The system consists of a copper hot water cylinder, a mounting system and solar collectors. The system does not need a mechanical pump to circulate the hot liquid around. It is an ideal solution for producing hot water in warm climates. It can be installed both on a flat and an inclined roof.
The active systems operate on the same principle as the thermosyphonic systems, except the fact that the hot water storage tank is situated away from the solar collectors. The system requires a pump and a controller in order to circulate the hot liquid around.