Hello, Guangguang balcony wall-mounted solar water heater is very good. It has high thermal efficiency, fast heating speed, stable temperature adjustment, can be used continuously by many people, and has a fixed consumer group. In winter, you can have hot water in the kitchen at any time, which is convenient; the water temperature is constant and the purchase cost is cheap. For ordinary households, an 8 liter machine is enough.
I hope my answer can help you.