Abstract: An electrically heated hot water system made of two superposed interconnected closed containers having a substantially elongated shape, a water inlet provided at the bottom of the lower container and a water outlet provided at the top of the upper container, two tubular members connecting the top surface of the lower container to the bottom surface of the upper container for allowing the water of the bottom container to raise into the upper container, immersible electrical heating elements disposed substantially across each container for heating the water adapted to be contained in the said containers, and a thermostatic control device connected to each container and to each heating element for maintaining the temperature of the water contained in each container at a predetermined degree, whereby the water heated in the containers by the heating elements is raised from the lower container to the tubular members.