The new heat pump solar hot water equipment to cancel the solar collector plate, rainy days as usual heating water, auxiliary heating energy consumption lower than the traditional solar water heaters, solar water heating project to reduce investment 50%, reduce the solar hot water project covers an area of ​​95%. First, the [traditional solar hot water project]: a heating water with energy-saving features, the traditional solar hot water project is a direct use of solar heat water heating equipment, by the rainy days, no sunshine at night can not make hot water , Need auxiliary heating equipment to ensure all-day, hot water supply throughout the year. So has the following disadvantages: 1, rainy days can not make hot water. 50% of the time throughout the year to use auxiliary heating equipment for hot water. 2, the actual use of sunny days only one-third of the time (during the day) to make hot water, the other time because there is no solar hot water, in order to meet the needs of hot water throughout the day, to increase the solar collector Area, increase the volume of thermal storage water tank, this will only increase the cost, increase the floor space, space is relatively small users will be difficult to implement. 3, according to the cumulative time calculation, the annual average of only 1,500 hours of hot water solar hot water equipment, and heating water is not stable, the rest of the time and insufficient part of the hot water heating equipment auxiliary heating equipment (most of the south of the Yangtze River The annual sunshine time in the region between 1000-2000 hours). Second, the [heat pump solar hot water equipment]: heat pump solar hot water equipment using heat pump technology for hot water, is an indirect use of solar thermal water heating equipment, rainy days, night heating water, do not need auxiliary heating Equipment to ensure that all day, year-round supply of hot water needs. Heat pump solar water heating equipment to absorb the sunlight in the air heat of hot water, does not require a huge solar collector, the air instead of solar panels, because of its large amount of stored heat can be guaranteed 365 days a year Intermittent hot water, canceled the solar collector plate, the space is relatively small users can also use. So has the following advantages: 1, energy-saving effect and the same as the traditional solar hot water equipment: auxiliary heating energy consumption is less than or equal to the traditional solar collector plate solar water heater. Each kWh (kWh) consumes an average of 3kW of thermal energy per watt. The same power consumption is greater than that of solar collectors. The equivalent power consumption is 3 times more than that of hot water boilers. 2, the independent use of unaffected by the rainy days, you can achieve 365 days a year, 24 hours a day hot water. 3, do not need solar collector, reducing the area of ​​95%. 4, due to the cancellation of the higher cost of solar collector, than the traditional solar hot water project to reduce investment 50%. 5, due to hot water 24 hours a day, you can reduce the hot water tank volume 50-70%. 6, with the use of solar water heating equipment can reduce the area of ​​solar collectors 50%, saving a lot of solar collector floor space and reduce the volume of water storage tank.