It doesn't matter.
Solar water heaters with auxiliary electric heating function, which use solar energy as the main source and are supplemented with electric energy, enable the solar water heater to operate normally all the time. year and 24 hours a day, as well as the efficiency is still relatively high when the ambient temperature is low. Without auxiliary power supply, solar heating cannot be used.
Detailed information
In fact, there are many tips for using water heaters. If you pay a little attention to it, you will effectively improve the heating capacity and. efficiency of the water heater. With proper maintenance, you can also extend the life of your water heater.
When taking a bath, if the water in the solar water heater is used up and the person has not flushed it, you can run cold waterfor a few minutes and use the principle that cold water flows. and the hot water floats to discharge the water in the pipe. Once the hot water comes out, you can take a shower. If there is still some hot water left in the solar water heater after taking a shower, the hot water obtained by running cold water for a few minutes can wash an extra person.
Baidu Encyclopedia - Solar Water Heater
Yes, solar water heaters must be equipped with electric backup heating to prepare for bad weather
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You can Take the example of an air-energy water heater.
The air-energy water heater uses the working principle of a heat pump to absorb heat at low energy present in the air, undergo heat exchange with the intermediate fluid and compress it. in gas at high temperature. It heats water through the pipeline circulation system and consumes waterelectricity only 1/4 of an electric water heater. This new product overcomes the shortcomings of solar water heaters which rely on sunlight to collect heat and which are inconvenient to install.
Air water heaters do not require sunlight, so they can be placed in the home or outdoors. After the water stored in the solar water heater runs out, it is difficult to produce hot water immediately and electric heating takes a long time. However, as long as there is air and the temperature is above minus 20 degrees Celsius, the air is lost. -The energy water heater can operate under pressure 24 hours a day. This way, even if one box of water runs out, the air-to-energy water heater will produce another box of hot water in about an hour or less. At the same time, it can also fundamentally eliminate safety risks such as leakage of electric water heaters, combdry use and harmful gases produced when using gas water heaters. It overcomes the shortcomings of solar water heaters, such as not being able to be used in the rain. days and impractical installation. It has high safety, high energy saving, long life, does not emit toxic gases and many other advantages. The lifespan of air-energy water heaters can generally reach 15 to 20 years.
You can go to the Zgoutes air-energy website to find out more http://www.zgoutes.com /