The present disclosure is related to a heating water device through solar energy, which operates under the same principle as conventional evacuated tube heaters, but in the case of the present invention, the collectors with evacuated tubes are replaced by a hot evacuated tank covered by a glass dome, whose outer wall, acts as the heat collector and is coated by a titanium oxide selective surface for capturing solar energy, where its inner wall will transmit the same directly to the water inside. The tank object of the present invention has a vacuum protection and isolation formed between the tank and the glass dome. The system includes a ceramic thermal battery that supplies the stored heat during its exposure to the sun, to the water, preheating the same while entering the tank through a coil that helically sweeps the ceramics and continues bringing heat to the water via the thermal tray or the bottom of the tank. The entire system is compact and confined, minimizing heat loss and ma ximizing resistance to the elements in general, and therefore increasing its service life.
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