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SFH Integrated Pressurized Solar Water Heater

SFH is the integrated pressurized solar water heater for domestic hot water that relies on the principle of thermosyphon to actively carry out natural circulation.
  • SFH

  • Stainless steel, Polyurethane, Heat pipe

  • Make hot water by sun energy

  • Heat pipe absorbed heat energy, pressurized structure

  • 3 years

  • 15  18  20  24  30 

  • 150L  180L  200L  240L  300L 


1. Product Description

1.1 Overview


  • SFH is the integrated pressurized solar water heater for domestic hot water that relies on the principle of thermosyphon to actively carry out natural circulation.
  • SFH series are mainly 120L, 150L, 180L, 200L, 250L and 300L, to meet the needs of families in different regions.

  • It is especially suitable for high-latitude, cold and low temperature areas.

1.2 Structure

SFH system consists of a hot water storage tank, vacuum tubes with heat pipes and frames, together with PT valve, air intake valve, check valve.

SFH Structure

Product details please check here :

1.3 Working Principle

The solar collector collects light energy through the AL/N/AL/SS/CU coating,and converts light energy into heat then stores heat energy in the insulated water tank through a heat pipe, it relies on the thermosiphon principle for natural circulation heating of the water tank. The tank is enclosed pressurized which provides high pressure hot water.


2. Features and specifications

2.1 Characteristics

  • The natural circulation is actively carried out by the principle of thermosyphon, meanwhile pressure of the hot water is large and equal to the running water pressure.

  • The water tank is a pressure-bearing structure, with a test pressure of 0.9Mpa and a working pressure of 0.6Mpa. The inner tank material is food grade stainless steel SUS304, by fully automatic argon arc welding and double-sided argon gas protection. Inner tank can be used for more than 15 years.

    Soldering video check here:

  • The solar water tank is insulated with polyurethane having independent bubbles and foaming density,36KG/m3. resulting in less than 2 °C temperature drop of hot water within 12 hours.The temperature can maintain at 25 ° C for 24 hours, and it was not deformed for a long time.

  • The solar heat pipe is a phase change heat transfer design so the heat energy start-up is very fast. When heat pipe absorbs lignt under sunshine, the temperature can reach 222 ° C, resulting in providing high temperature hot water. The system uses double-layer solar vacuum tube with AL/N/AL/SS/CU coating, absorption rate >92%, reflectivity<8%. and service life 15 years.

2.2 Specifications


2.3 Size



2.4 Optional Accessories

photobank (4)
1. SR609C controller: display water temperature, fully automatic control.

2. Electric heating: auxiliary heating equipment.
3. Magnesium rod: anode protection, protect the inner tank from corrosion.

4. Thermostatic valve: automatically control the outlet temperature according to the setting.


5.Water Pressure Rregulator valve: SFO-PR15 Water Pressure

Rregulator valve acts to keep the system pressure stable and

depressurized, which can avoid the influence of unstable water

supply pressure on the solar hot water system.

3. Product installation and case

3.1 Installation

  • SFH system is installed on the ground, on a flat roof or on a sloping roof. Frames need to be fixedly connected with and the mounting base (roof or ground).
  • Installation and use steps: select the installation location, assemble frames put water tank on the tank holder, install solar heat pipe, connect hot and cold water pipes, add water into tank then check if any water leakage, fix the system, daily use, regular inspection and maintenance.

    Please check here for installation methods and procedures :

3.2 Cases


4. Warranty and certificate

  • 1st sunflower has passed certifications from different quality management systems and  product testing institutions. such as ISO9000, CE, Solarkeymark, SRCC, BV, SGS, Watermark etc

  • Solar vacuum tube and bracket: 5 years

  • Water tank: 3 years

5. Packaging and transportation

  • The solar vacuum tube with heat pipe is packed in carton, and the carton is equipped with anti-pressure foam. We will add plywood cases extraly for package of goods under LCL shipment.

  • The package design can be stacked and stored, but the base layer should be flat and evenly stressed. The maximum stacking level of the solar vacuum tube is 17 levels.

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Add : NO.1, hongxi road, niutang industrial district, 
changzhou, jiangsu, china
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