Working Pinciple of  domestic  water circle Heat pump water heater:

The outside air gets heated up by energy from the ambient air source all year round. So this system no need sunlight.There is a heat exchange inside the outdoor Unit,water will heated by the heat exchanger,then hot water flow to the Water tank.

Advantage:

 Heat pumps do not require direct sunlight in order to operate.  Using heat pump hot water systems, houses which may not have been suitable for rooftop solar hot water collectors can now get the benefit of free solar energy - and save $$$$ on power bills,also this system is water circle,not freon medium,so the system is safe.

Compare with the normal electrical heater,it is not use electricity to make energy,it just use electricity move energy from low to high.So it can save 80% electricity  compare with the electrical water heater.

Heat Pump Water Heater  has a "real time contol" function that allows the water heater to operate during the day, thus taking advantage of the higher temperature and limits noise disruption.

The advanced automatic controls allows the Heat Pump Water Heater to operate under 3 settings - Economy (100% heat pump), Hybrid (a mixture of heat pump and electrical) and Electrical (100% electrical) - to meet different hot water demands.

Installation is very easy:The outdoor unit can installed on the balcony or wall,water tank install at indoor 

Tank Capacity:150L,200L,300L

Warranty:3years standard,can extend to 5year