| 摘要 |
The present invention relates to methods and apparatuses for operating hot water systems. In one particular embodiment, a hot water system (100) comprises a water tank (110) for storing water, a heating element (116) disposed in said water tank and a solar heating sub-system (140 and 150) for heating water stored in the water tank (110) and an electronic controller (120) adapted to control operation of the heating element (116) and solar heating sub-system (140 and 150) so as to: ensure that water in the water tank reaches a first predefined temperature at least once in a predefined time duration on a continuous basis, ensure that the temperature of water delivered from the hot water system is greater than or equal to a second predefined temperature and operate the heating element only when energy delivered by the solar heating sub-system is insufficient to heat the water in the hot water system. |
