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China Top Quality of Solar Water Heater (250Liter)

Solar Water Heater details:



How solar water heater works
1.Solar water heater of all glass evacuated tube collector integrated with storage tank, are ideal for use in houses and other applications where cheap, reliable hot water supply is required. They are simple, economic and practical. 
2. As the specific gravities of hot water and cold water are different, cold water goes downward and hot water goes upward. 
3. When cold water in evacuated tubes is heated, it becomes lighter and goes to the water tank, while cold water in the tank goes down to the evacuated tubes 
4. Through this circulation, the cold water in the water tank will be gradually heated.


Solar water heater system features
1. Cheap and reliable solution, Simple structure, Easy installation 
2. High efficiency 
3. Withstands water pressure no more than 0.1MPa 
4. Operated without any power supplying 
5. Electric heater can be used as back up in rainy days 
6. Hot water can be used directly, or can be used as a pre-heated 

Solar water heating system optional accessories
1. Controller 
2. Electrical heater: 1.5/2/2.5kw

3.Magnesium anode


Solar water heating system material specification:


FD-NPB58-30 solar water heating system

Material of out tank

Food grade 0.4mm color steel

Material of inner tank

0.8mm thickness SUS304 stainless steel

Tank insulating layer

55mm 45kg/m³ high-density polyurethane foamed

Inlet and outlet hole

Male G 1/2, 3/4

Max pressure

0.05 Mpa

Solar collector tube

3.3 Borosilicate glass with N/Al coating

Thickness of glass tube


Vacuum tube tightness

P≤0.005 Pa



Emission ratio


Idle sunning property parameters


Average heat loss coefficient



1.5mm thickness galvanized steel

Structure of tank:

5 holes for air vent,overflow,water inlet and outlet,electric heater                   


Argon arc welding

Fastening pieces:

Made of stainless steel screw

Absorber area


Tube quantity

30 tube  58x1800mm

Tank capacity


Afford for house









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