Solar water heaters mainly convert solar energy into heat by absorbing solar energy, heating water for people to use. Therefore, there is no need to use electricity.
However, some accessories installed need to be connected to electricity. for example:
If you install a solar controller, it is used to display the water temperature and water level; control the water supply of the water tank through the water temperature, water level, and time settings; and can control the supporting equipment such as electric heating, and fully intelligently control the solar water heater. This will use electricity but very little.
Or you want to turn on electric heating or other backup heating to meet the hot water demand on rainy days, which requires electricity.