The increasing tension in the supply of finite energy sources like petrochemical energy has accelerated the rapid development of new energy sources, with the use of solar water heaters for photothermal purposes becoming increasingly widespread. Below are several points to consider when dealing with solar water heaters:

The solar controller must be installed in a dry, shaded location; it is not suitable for outdoor or bathroom installations.

2. The cold and hot water inlets of the mixed valve are installed with one-way valves to prevent water mixing and resultant waste of hot water.

3. Avoid using large-diameter pipes for residential solar water heaters, as the hot water inside can easily cool down when not in use.

4. Equipped with an AC relay to power electric heating, extending the lifespan of the control instrument.