How to add water to solar water heater

When the temperature is not too low (7℃ - 5℃), after using the water at night, there is still hot water left in the water heater (water in the tube empty). You must fill it with water immediately. to lower the internal water temperature of the water heater when the heat is lost at night and the heat energy is fully used for taking a bath, if the water in the solar water heater has been used up and the person was not rinsed. , you can run cold water for a few minutes and use the principle of cold water flowing and hot water floating to discharge the water in the vacuum tube. When the hot water is expelled, you can continue to shower. solar water heater: When the weather is extremely hot and the water temperature is extremely high, you should use the water supply valve to limit the pressure of adding water