(If there is a video playback problem, you can go to ) The concentrator consists of a reflector and axes. Two axes are motorized manually or electronically controlled, such as a parabolic antenna. The third axis motor is passive, powered with his weight. It is thus possible to cook from the inside of the house, almost as if it were a conventional stove. When there's no need for cooking, the concentrated solar energy can be used to heat the room or to heat a hot water tank.