This product is based on the principle of reverse Carnot cycle, driven by a small amount of electricity, with refrigerant as the carrier, continuously absorbs low grade heat in the air and transforms them into usable high grade heat, which is then released into water so as to generate domestic hot water, and finally transports the hot water to users through hot water pipes. With the same working principle as heat pump air conditioner that obtains heat from the environment to heat the indoor air, heat pump water heater uses the heat to generate hot water. Heat pump water heater is a highly efficient, energy saving and environmental friendly product. The optimized design can ensure the heating efficiency under low ambient temperature, with higher low-temperature heating capacity, COP and reliability. The unit adopts multiple modular network control and maximum 16 sets unit can be controlled at the same time. The heating capacity is 28~848kW, which can be widely used for factory, hotel, restaurant, hospital, beauty parlor, laundry, bath center, large scale floor heating project and so on.