1. In terms of operating cost, conventional solar energy operates almost at zero cost under direct sunlight. Unfortunately, in rainy, snowy days or at night, it can only rely on the auxiliary system to work. Statistics show that, in normal use, the annual power consumption of conventional solar energy auxiliary system is higher than the annual total power consumption of heat pump units.

2. In terms of investment: if the same water supply effect is achieved, the investment in heat pump hot water units is less than that in conventional solar energy products, and economic electric energy can be used to make hot water reserves when electricity consumption is low.

3. In terms of use: Conventional solar energy products are obviously affected by the weather. They cannot work in rainy, snowy and night days, while heat pump water heater units can work as usual in rainy, rainy, snowy, night or sunny days to provide hot water all day long.

4. Other functions: the use of heat pump units is not limited by the location, and they can be placed anywhere, and the floor space is very small, while conventional solar energy needs to occupy a lot of space to achieve the same heating effect, and they must also be placed in the open air; The heat pump unit can produce cold air while producing hot water, which can be used for dehumidification, cooling, air filtration and other auxiliary functions.