A solar water heater with electric backup provides a solar water heater that is equipped with an electric pump. When the sun is not bright enough to power the tank, this electric pump will provide hot water. The tank has a temperature difference of two degrees from the ambient temperature, which is sufficient for heating water in a home.
The backup heating device is controlled by a controller. If a failure occurs, the controller will activate the electrovalve to provide gas to the burner. The controller will then wait for a specific period of time before making at least one additional attempt to start the burner. If the heating system cannot start up, it will show a visual message that indicates failure.
In order to ensure safe operation, this solar water heater with electric backup has a bimetallic detector and an ionized ignition system. The detector is installed in the lower part of the storage tank of the solar water heater. Its outlet is located after the bimetallic cable. When the temperature in the tank drops below 35deg C, the backup heater will activate. When no further demand for water is felt, the backup heater will turn off.
There are many benefits to using a solar water heater with electric backup. The backup system will work even on long overcast days, as it uses diffused radiation from the sun to heat the water. It is possible to integrate the system with your existing electric system. This way, your electric system will act as a back-up when the temperature of the water falls below 40oC.