Can photovoltaic water heater be used normally in rainy and snowy days

 

In rainy days, there is still sunlight, and photovoltaic panels will still generate electricity, but when the sunlight is weak, the power generation is small. When the photovoltaic heating can not reach the set temperature, the utility power will be used for heating supplement. Try to use photovoltaic heating during the day, when the temperature is not enough, use municipal heating at night. China's average annual sunshine time is 365-45 = 320 days, so compared with ordinary gas water heater, electric water heater and air energy water heater, it still has great advantages in power saving.