Hello!
Of course, electric heating only has the function of auxiliary heating. Without it, it is no different from ordinary solar energy!
I think it's safer not to heat it, but it's more convenient to have electric heating, and you can use hot water even on cloudy and rainy days!
This is just my personal opinion, don't comment if you don't like it, thanks.
From what you said, the inverter tube is more expensive because it is a new model in 2009. It specially adds rare metal elements to the film layer of the inverter tube. vacuum to improve photosensitivity and can adjust the temperature accordingly. In the sun's rays during the day. With the change of radiant illumination, automatic frequency conversion adjusts the absorption range of the vacuum tube to the solar spectrum. Even if the intensity of sunlight continues to change, the vacuum tubecan always maintain the best. absorption state
There are many types of solar water heaters, but only one of them can be divided into four types. If you don't all shower on the same day, 3 people can use it. you are not satisfied, send me an email to [email protected] and I will answer it for you