Heater solar water 2






The Riwatt IronMan Series is an integrated pressurized solar water heater designed for domestic use, utilizing the thermosyphon principle for efficient natural circulation. Available in 100L, 150L, 200L, and 300L capacities, it caters to the diverse needs of households across various regions, particularly in high-latitude, cold, and low-temperature environments.
Heat Pipe Solar Water Heaters efficiently with this integrated pressurized solar water heater.
Featuring advanced heat pipe technology, fast heating, stable pressure, and durable stainless steel tank, it delivers reliable hot water while reducing energy costs.
The integrated pressurized solar water heater utilizes heat pipes for efficient water heating. Here’s an overview of its operation:
1. Solar Collector: Mounted on the roof or in sunlight-rich areas, the collector consists of evacuated tubes, each containing a copper heat pipe.
2. Evacuated Tubes & Heat Pipes: The heat pipe, filled with a working fluid (e.g., water or alcohol), has two sections: an evaporator in the collector and a condenser in the storage tank.
3. Solar Absorption & Heat Transfer: Sunlight heats the fluid in the evaporator, causing it to vaporize. The vapor then moves to the condenser, where it releases its heat, warming the water in the tank.
4. Gravity Circulation: Gravity drives the condensed liquid back to the evaporator, ensuring continuous circulation.
5. Pressurized Storage Tank: The tank is pressure-resistant and stores hot water, which can be supplied directly to plumbing fixtures.
6. Temperature Regulation: Sensors and a controller maintain optimal temperature and pressure for efficient and safe operation.
This system is highly efficient, providing reliable hot water even in varying weather conditions, while offering better water pressure than non-pressurized alternatives.


● With ADJUSTABLE bracket(suitable for both flat roof and sloop roof)
● New designed vacuum tube holder.
● New design electric element cover.
● 316L stainless steel socket.

| Heating Pipe Solar Water Heaters Overview | |||||
| Model: | Solar Vacuum Tube | Aperture Area | Gross Area | Capacity | |
| Item No. | Qty /【pcs】 | Size /【mm】 | 【M2】 | 【M2】 | 【L】 |
| IronMan-100L | 10 | Φ58 X 1800 | 0.94 | 1.546 | 100 |
| IronMan-150L | 15 | Φ58 X 1800 | 1.395 | 2.319 | 150 |
| IronMan-200L | 20 | Φ58 X 1800 | 1.874 | 3.092 | 200 |
| IronMan-300L | 30 | Φ58 X 1800 | 2.811 | 4.632 | 300 |
| Heat Pipe Solar Water Heaters Technical Parameters | ||
| 1 | Model | IRONMAN-SERIAL |
| 2 | Water Tank | |
| 3 | Material of Outer Tank Shell | High Quality Stainless Steel Plate |
| 4 | Material of Inner Tank Chest | Food Grade SUS304-2B SS |
| 5 | Water Tank Diameter | 【360/470 mm】 |
| 6 | Water Tank Insulating Layer | High Density Polyurethane,【55mm】 |
| 7 | Vacuum Tube | |
| 8 | Tube Structure | All-Glass Double-Tube Co-Axial Structure |
| 9 | Glass Material | High Borosilicate 3.3 glass |
| 10 | Tube Size | 58*1800mm * 24 Tubes |
| 11 | Coating Material | 【Cu/SS-ALN(H)/SS-ALN(L)/ALN】 |
| 12 | Sediment Method | Tri-Element Magnetron Sputtering Plating |
| 13 | Absorb Ratio | 0.93-0.96> 92% (AM 1.5) |
| 14 | Emission ratio | 0.04-0.06(800C±50C) |
| 15 | Heat Pipe | |
| 16 | Heat Pipe Material | TU1 Copper |
| 17 | Heat Pipe Condenser Size | 【Ø14mm Diameter】【80mm Length】 |
| 18 | Heat Pipe Body Size | Ø8mm Diameter |
| 19 | Riwatt Heat Pipe Pocket | 【316 STAINLESS STEEL】 |
| 20 | Heat-Transfer-Fins | Premium Complete Type (Super Model) |
| 21 | Max.Working Temp | -37 ~250C |
| 22 | Start-up Temp. of Heat Pipe | <=30C |
| 23 | Working Pressure | 0.7Mpa. |
| 24 | Testing Pressure | 1.2Mpa. |
| 25 | Daily Efficiency | 55% |
| 26 | Heat Pipe Material | TU1 Copper |
| 27 | Bracket | |
| 28 | Bracket Material | Stronger Stainless Steel or Galvanized Steel |
| 29 | Bracket Angle | 27° |
| 30 | Bolts & Nuts | Stainless Steel |

The water tank is designed as a pressure-bearing structure with a test pressure of 1.2Mpa and a working pressure of 0.7Mpa. This indicates that the system is robust and can handle certain pressure conditions.
The inner tank material is made of food-grade stainless steel (SUS304 or 316L), ensuring water safety.
The inner tank is welded using fully automatic argon arc welding and double-sided argon gas protection, contributing to the durability of the tank. The inner tank is expected to have a service life of more than 15 years.
The solar water tank is insulated with polyurethane that has independent bubbles and a foaming density of 36KG/m3.
This insulation results in a minimal temperature drop of less than 2 °C of hot water within 12 hours.
The insulation is effective enough to maintain a temperature of 25 °C for 24 hours, and it is resistant to deformation over a long period.
The solar heat pipe utilizes a phase-change heat transfer design, leading to a fast start-up of heat energy.
The heat pipe can reach temperatures of up to 222 °C when exposed to sunlight, providing high-temperature hot water.
The system employs double-layer solar vacuum tubes with AL/N/AL/SS/CU coating, ensuring high absorption rates (>92%), low reflectivity (<8%), and an expected service life of 15 years.
These characteristics collectively make the integrated solar water heater efficient, durable, and capable of providing hot water using both solar and thermosyphon principles.
Keep in mind that proper installation and maintenance are crucial to ensure optimal performance over time.


Water tank Solar vacuum tube and bracket: 5 years
Accessories(PT valve, check valve, SR609C controllers, magnesium anode. backing up electrci heating element,vacuum safety valve…): 1 year

| Heat Pipe Solar Water Heater Accessories | ||
| Serial No. | Description | QTY. (Pcs) |
| ❶ | PT VALVE (90/95℃ Degree ) 3/4’’ | 1 |
| ❷ | Non Return & Pressure Relief Valve 3/4’’ | 1 |
| ❸ | Backing up electric heater element. 1’ or 1 1/4” | 1 |
| ❹ | Vacuum Safety Valve | 1 |
| ❺ | Magnesium Anode | 1 |
| ❻ | SR609C Solar Controller | 1 |
| ❼ | Pre-Water-Filters | 1 |
| ❽ | Thermostatic mixing valve – 3/4’’ | 1 |









With premium materials such as 1.5mm inner tank stainless steel, 58×1800mm vacuum tubes, and copper heat pipes, the system typically lasts 15–20 years with minimal maintenance.
The 1.5mm thick stainless steel inner tank enhances pressure resistance and durability, ensuring long service life and safe operation under high water pressure. It prevents deformation and leakage, making it suitable for multi-storey buildings and pressurized water systems.
The copper heat pipe conducts heat rapidly from the solar vacuum tube to the tank, while the aluminum fin increases the heat absorption area. This combination ensures faster water heating, higher efficiency, and stable performance even in low sunlight conditions.
Yes. It comes with an adjustable flexibility mounting bracket designed for both flat and sloped roofs. The angle can be adjusted according to your local latitude to maximize solar energy absorption throughout the year.
Absolutely. The pressurized design allows direct connection to municipal water systems or booster pumps, providing strong water flow and steady pressure for showers and kitchen use without the need for gravity feed.
Maintenance is simple. Regularly clean the vacuum tubes and check the heat pipes for scaling or dust buildup. Inspect the mounting structure and connections every 6–12 months to ensure long-term efficiency and safety.
Yes. The integrated pressurized solar water heater can be combined with electric or gas water heaters as a pre-heating stage, reducing energy consumption and extending the life of auxiliary heating systems.
This system delivers higher water pressure, faster heating, and superior durability. The integrated design saves space, while the copper heat pipe technology ensures quick heat transfer and reliable year-round performance.
Yeah, sure, we have video on youtube, could you please click here for more installation details? thank you.
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