It is an auxiliary heating in solar water heating projects. Since solar water heaters cannot meet normal water consumption in rainy weather, auxiliary heating is used to heat hot water. The methods are: boiler auxiliary heating, gas water heater auxiliary heating (this). is widely used in homes), electric supplementary heating and the most energy-saving air-energy heat pump supplementary heating (the investment is higher than the first three methods, but the cost of operation is the lowest)
The method you mentioned is different from the auxiliary heater The heating is different Generally, the auxiliary heater directly heats the water in the water tank. This is equivalent to directly using the auxiliary form when solar energy is not used. .
You can also use thismethod, which is equivalent to draining water directly from the water tank and heating it with a gas water heater. .
1. If they are all on it depends on which one you are using at the highest pressure or which hot water is closest to the water outlet. 2. One of them must be turned off. 3. Check the pipes. you take to see what you need to do. This is an unsealed rooftop solar system. If both are on, your solar system is not sealed and solar energy will flow out of the overflow pipe. .If it is a closed system, the water will not be hot in winter. Get cold water
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