• Sourcing Solutions
  • Services & Membership
  • Help & Community

Quick Details

  • Type: Evacuated Tube
  • Pressure: Pressurized
  • Circulation Type: Indirect / Closed Loop (Active)
  • Heating System: Thermosyphon (Passive)
  • Connection Type: Direct-Plug
  • Installation: Freestanding
  • Housing Material: Galvanized steel
  • Certification: CE, Solar Keymark, SRCC,ISO9001, ISO9001, CE, solar keymark
  • Capacity: 300
  • Place of Origin: Zhejiang, China (Mainland)
  • Brand Name: Sunwe/OEM
  • Model Number: IP01
  • Inner Tank Material: SUS304-1.5mm thickness
  • Tank Capacity: 150l,240L.300L
  • Gross Weight: 80-300KG
  • Power Source: Solar

Packaging & Delivery

Packaging Details cartons
Delivery Time 7 to 15days


Sunwe Integrative Pressurized Solar Water Heater compose of pressure solar tank and high performance vacuum tube with heat pipe. The Vacuum tube absorbs solar energy, and conductive copper pipe(heat pipe) transfers the heat into the pressurized water tank. In this case, the water inside the tank becomes hot. With the design of no water inside vacuum tube, the system will keep work even one or more tube was broken by accident or in a freezing area.



 Specifications ( We accept the custom-made according to your specificaitons)  

Storage Tank Inner TankSUS304-2B food grade stainless steel( 1.5mm )
Outer TankPVDF steel 0.4mm (good at anti-rust)
Insulating LayerPolyurethance Foam 50mm
Inlet/outlet 3/4
Vacuum Tube Material of the glass tubeBorosilicate glass 3.3
Absorptive Coating GradeALN/AIN-SS/CU
Glass Thickness1.6mm
Distance between two tubes75mm
Tube holderUV stabilized nylon
Heat Pipe MaterialTU1 copper
Condenser materialTU1 copper
DiameterCondenser dia 14mm, body dia 8mm
Contact sheetsAluminum fin
Frame MaterialAluminum alloy (good at anti-rust)
Angle22 to 45 degree available
Optional ControllerSR609
Electric Heater1500W /2000W


 Technical Parameters                                                                                                    

Storage Tank Pressure endurable6bars working pressure
Pressure test in factoryover 12bars
P/T valveRelease pressure when pressure over 6bar or temperature over 99°C
Magnesium barCheck or change it every two years
Vacuum Tube Absorption coefficient≥ 94%
Emission coefficient≤ 7%
vacuum (Pa)<5*10-3
Hail resistance25mm diameter
Heat Pipe Start working30 degrees
Thermal conductivity2x104 to 1.6x106  W/(m.°C)
Anti-freezingMinus 30 °C


Product Show                                                                                            



Included Accessaries                                                                               


 Option Accessaries                                                                                  





QuestionWhat is solar water heater?
AnswerSolar water heater or solar hot water systems comprise several innovations and many mature renewable energy technologies that have been well established for many years. Solar water heater has been widely used in Australia, Austria, China, Cyprus, Greece, 
QuestionWhat is integrative pressure heat pipe solar water heater?
AnswerIn a Sunwe "integrative pressure heat pipe" solar water heater system the storage tank is horizontally mounted immediately above the solar collectors on the roof. No pumping is required as the heat energy which generate by vacuum tube will be transfered up by super conductive heat pipe immediately. 
QuestionIs Sunwe solar water heater usable in winter?
AnswerSunwe solar water heater systems are designed to deliver hot water for most of the year. However, in winter there sometimes may not be sufficient solar heat gain to deliver sufficient hot water. In this case a gas or electric booster is used to heat the water.
QuestionWhat is a heat-pipe?
AnswerHeat Pipe: An evacuated rod or pipe used for heat transfer.
QuestionWhat is Insolation?
AnswerInsolation: Don't confuse this with insulation - the one letter change makes a big difference. Insolation refers to the amount of sunlight falling on the earth.
QuestionWhat is Irradance?
AnswerIrridance, Irridation: Basically the same as Insolation
QuestionWhat is IAM?
AnswerIncidence Angle Modifier (IAM): refers to the change in performance as the sun's angle in relation to the collector surface changes. Perpendicular to the collector (usually midday) is expressed as 0', with negative and positive angles in the morning and afternoon respectively. Collectors with a flat absorber surface, only have 100% efficiency at midday (0'), whereas solar tubes provide peak efficiency mid morning and mid afternoon, at around 40' from perpendicular. This results in good stable heat output for most of the day. What is the Aperture? The part of the collector through which light enters. For evacuated tubes this refers to the cross-sectional surface area of the outer clear glass tube measured using the internal diameter, not the outside diameter.(Eg. 0.0548m x 1.72m = 0.094m2). 1.72m is the exposed length of the evacuated tube.
QuestionWhat is Absorber?
AnswerAbsorber: The part of the collector that actively absorbs the light rays. For solar tubes this is defined as the cross-sectional area of the inner tube (selective coated) measured using the outside diameter. (Eg. 0.047 x 1.72m = 0.08m2) This value is used when calculating efficiency values. For solar tube collectors with reflective panels, the entire circumferential surface area of the inner tube is often used when calculating absorber area, as the reflective panel is supposed to reflect light onto underside of the evacuated tube.
QuestionAre Vacuum Tube Water Heater Better than Flat Plate?
AnswerFlat plate thermal solar water heater have been in use for several decades, but only in relatively small numbers, particularly in Western countries. Evacuated tubes have also been in use for more than 20 years, but have been much more expensive than flat plate, and therefore only chosen for high temperature applications or by those with money.In recent years the production volume of evacuated tubes has exploded, resulting in greatly lower manufacturing and material costs. The result is that evacuated tubes are now similar in price to flat plate, but with the insulating benefits of the evacuated tube, they are set to become the default choice for thermal solar applications worldwide.
QuestionIs solar water heating a viable alternative to gas or electricity?
AnswerSolar should not be seen as an alternative to gas or electricity, but rather a supplement. Solar cannot totally replace the need for gas or electric heating as there are sometimes days when there is little sunlight. When averaged over a year, a correctly sized solar system can provide 60%-70% of a household's hot water needs. Providing more than this is unadvisable, as too much heat will be produced in the summer. The hot water system can easily be automated, so hot water is guaranteed regardless of sunlight levels.
QuestionHow long will it take to recoup my investment?
AnswerSolar collectors are much more affordable than many other solar hot water heaters. For a household of 4, the price of a full system may not be too much more than a new electric or gas system. Depending on your location (solar levels) and current hot water usage the annual electricity or gas saving will differ. However in a normal household that spends 25% of its electricity bill on hot water heating, the full cost of the purchase may be recouped as quickly as 4-5 years in reduced bills. You will definitely make considerable savings during the life of the solar hot water heater.
QuestionCan solar water heater be used in cold conditions?
AnswerYes. Solar water heater can be used in temperatures as low as -30'C, although performance is greatly reduced in such extreme conditions. Good heat output is still achieved in mild sub-zero conditions.
QuestionWhat happens if one of the solar tubes is broken?
AnswerFirstly, tubes are very strong and not easily broken, but if the worst should happen, solar tubes can be replaced very easily. They are inexpensive and available though The Solar Shop. The solar water heater can operate with several broken tubes, but the efficiency will be reduced, so it is recommended that broken tubes be replaced immediately.
QuestionWill water be heated on a cloudy day?
AnswerAlthough the heat output of the solar water heater is reduced on overcast days, it will still be able to provide heating. If it is a heavily clouded day or raining, then more gas or electric boosting may be required to maintain water at the required temperature. This system will be automated so you don't have to worry about running out of hot water on a rainy day.
QuestionWhat is the benefits of solar water heating?
AnswerHot water throughout the year: the system works all year round, though you'll need to heat the water further with a boiler or immersion heater during the winter months. Cut your bills: sunlight is free, so once you've paid for the initial installation your hot water costs will be reduced. Cut your carbon footprint: solar hot water is a green, renewable heating system and can reduce your carbon dioxide emissions.
QuestionWhat is solar water heaters?
AnswerSolar water heaters—also called solar domestic hot water systems—can be a cost-effective way to generate hot water for your home. They can be used in any climate, and the fuel they use—sunshine—is free.
QuestionWhat is indirect or closed loop solar water heater systems?
AnswerIndirect or closed loop solar water heater systems use a heat exchanger that separates the potable water from the fluid, known as the "heat-transfer fluid" (HTF), that circulates through the collector. The two most common HTFs are water and an antifreeze/water mix that typically uses non-toxic propylene glycol. After being heated in the panels, the HTF travels to the heat exchanger, where its heat is transferred to the potable water. Though slightly more expensive, indirect systems offer freeze protection and typically offer overheat protection as well
QuestionOverheat protection?
AnswerWhen no hot water has been used for a day or two, the fluid in the collectors and storage can reach very high temperatures in all systems except for those of the drainback variety. When the storage tank in a drainback system reaches its desired temperature, the pumps are shut off, putting an end to the heating process and thus preventing the storage tank from overheating. One method of providing over heat protection is to dump the heat into a hot tub. Some active systems deliberately cool the water in the storage tank by circulating hot water through the collector at times when there is little sunlight or at night, causing increased heat loss. This is particularly ineffective in systems that use evacuated tube collectors, due to their superior insulation. No matter the collector type, however, they can still overheat and ultimately rely on the operation of temperature and pressure relief valves.
QuestionFreeze protection?
AnswerFreeze protection measures prevent damage to the system due to the expansion of freezing transfer fluid. Drainback systems drain the transfer fluid from the system when the pump stops. Many indirect systems use antifreeze (e.g. propylene glycol) in the heat transfer fluid. In some direct systems, the collectors can be manually drained when freezing is expected. This approach is common in climates where freezing temperatures do not occur often, but is somewhat unreliable since the operator can forget to drain the system. Other direct systems use freeze-tolerant collectors made with flexible polymers such as silicone rubber
QuestionTypes of solar water heating systems?
AnswerSolar water heaters can be either active or passive.[disambiguation needed ] An active system uses an electric pump to circulate the heat-transfer fluid; a passive system has no pump. The amount of hot water a solar water heater produces depends on the type and size of the system, the amount of sun available at the site, proper installation, and the tilt angle and orientation of the collectors. Solar water heaters are also characterized as open loop (also called "direct") or closed loop (also called "indirect"). An open-loop system circulates household (potable) water through the collector. A closed-loop system uses a heat-transfer fluid (water or diluted antifreeze, for example) to collect heat and a heat exchanger to transfer the heat to household water.
QuestionSolar water heating?
AnswerSolar water heating (SWH) or solar hot water (SHW) systems comprise several innovations and many mature renewable energy technologies that have been well established for many years. SWH has been widely used in Greece, Turkey, Israel, Australia, Japan, Austria and China. In a "close-coupled" SWH system the storage tank is horizontally mounted immediately above the solar collectors on the roof. No pumping is required as the hot water naturally rises into the tank through thermosiphon flow. In a "pump-circulated" system the storage tank is ground or floor mounted and is below the level of the collectors; a circulating pump moves water or heat transfer fluid between the tank and the collectors. SWH systems are designed to deliver hot water for most of the year. However, in winter there sometimes may not be sufficient solar heat gain to deliver sufficient hot water. In this case a gas or electric booster is normally used to heat the water.
QuestionSolar Thermal Introduction?
AnswerSolar thermal systems are based on a simple principle known for centuries: the sun heats up water contained in a dark vessel. Solar thermal technologies are efficient and highly reliable, providing solar energy for a wide range of applications like domestic hot water and space heating in residential and commercial buildings, support to district heating, solar assisted cooling, industrial process heat, desalination and swimming pools.


How Solar Water Heaters Work                                                                                   


One of our most popular units for domestic water pre-heating, the evacuated tube system, consists of an array of glass vacuum tubes feeding into aheavily insulated, stainless steel lined 40 gallon header tank. The diagram shows the heat pipe system in which a small amount amount of glycol within an inner copper tube vapourizes and carries the heat into the tank where it condenses and returns in a continuous cycle as long as there is a semblance of sunshine, even on a relatively cloudy day, and regardless of the outside temperature. 



Each tube has a copper heating element which is inserted into the tank. No water circulates in the tubes themselves.


There are two secrets to the efficiency of evacuated solar tubes: the high technology coating on the inner tube absorbs nearly all of the sun’s energy, and the vacuum between the absorber and the outer tube means that no heat can escape by conduction or convection.


Collector tubes can work all year round in cold climates. As cylinders, the tubes track the sun across the sky. Low heat loss and high efficiency mean that even days with little sun will produce some hot water. In sunlight the unit produces 5000 BTU/hour.



The system is intended to pre-heat water entering the regular domestic water tank, and also works effectively with on demand-type hot water systems. In some instances, such as off-grid summer cabins, this unit may even be the sole source of hot water. No pumps or other electrical equipment is required. The system also works well to preheat water for hot tubs, swimming pools and radiant floor heating.


Transaction History of the Supplier

Below is the information about the supplier's transactions conducted via Alibaba.com. If you require further details regarding the transaction data, please contact the supplier directly.

Transaction Overview


Transaction Details

This supplier has completedtransactions with buyers from .

Shipping Destination
Transaction Value
Transaction Date
Email to this supplier
China (Mainland) | Manufacturer, Trading Company
Transaction Level:
Supplier Assessments:
The supplier supports Trade Assurance – A free service that protects your orders from payment to delivery.
Supplier's Trade Assurance Limit: US $41,000
Learn More