Automatic Style compact non-pressure Solar Energy Water Heater

It is a kind of updates system based on semi-auto compact non-pressure solar water heater, same working principle, but can load cold water in automaticlly.

The extend tank is fitted on the top/side of the main water tank, there is a ball valve inside, which can close the input pipe automaticlly whenever the main tank is full, it is our patent design, 10 years before.

Automatic system working pressure: 0.3Mpa.

Two pipe lines, one for cold water input, another is used for hot water output

Same as semi-auto system, which should be better placed higher than the user level, more higher more pressure for hot water.

Profit ( compare to the semi-auto system): 1. when the main tank is full, the ball valve can work itself automaticlly, you don't need to wait 2. This system can take max 0.3mpa water pressure ,

Defect ( compare to the semi-auto system): 1. the main tank are full of water all the time, when you use hot water, cold water come in at the same time, mix with the hot water, water temperature come down slowly 2. you can't use out of all 100% hot water 3. The joint parts( between small tank and the main tank) must be protected in case of very lower temperature in winter time.

Others are all same as the semi-auto systems.