What is the warranty period?

We provide a 5-year warranty for this solar water heating system.

Is OEM/ODM service available?

Yes, both OEM and ODM services are available for this product.

Anti-Freezing Indirect Active Solar Water Heating System for Domestic Hot Water

Name: Anti-Freezing Indirect Active Solar Water Heating System for Domestic Hot Water
Brand: Shandong Longguang Tianxu Solar Energy Co., Ltd.
SKU: 1983327012

Shandong, ChinaShandong Longguang Tianxu Solar Energy Co., Ltd.

US$100.00-1,000.00

1 Set

Product profile

Customization

Available

After-sales Service

Provided

Warranty

5 Years

Max. Capacity

>200L

Structure

Separate Type

Pressure

Pressurized

Interior Material

Enamel

Collector Components

Glass Vacuum Tube

Composition

Tank Insulation

Certification

CE, ISO9001, CCC, RoHS, CB, SASO

Transport Package

Carton Box

Trademark

Tianxu or OEM

Origin

China

HS Code

841919

Production Capacity

50000pieces/Year

Key features

Anti-Freezing Technology: Uses 50/50 propylene glycol mixture for reliable operation in very cold climates.

Automatic Backup Heating: Electric or gas backup element automatically switches on when solar energy is insufficient.

Large Capacity Options: Available in 150L to 1000L vertical pressurized tanks to suit various household needs.

Premium Inner Tank: Constructed with SUS304 stainless steel inner tank for durability and corrosion resistance.

Comprehensive Certifications: Certified by CE, ISO9001, CCC, RoHS, CB, and SASO for quality and safety standards.

5-Year Warranty: Provides a 5-year warranty coverage for peace of mind and product reliability.

Efficient Heat Exchange: Features copper coil or stainless steel flexible pipe for effective heat transfer.

Professional Manufacturer: Produced by Tianxu, a leading manufacturer with advanced production lines since 2002.

Company profile

Shandong Longguang Tianxu Solar Energy Co., Ltd.

Shandong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableExport Year: 2003-09-01 CertifiedNearest Port: Qingdao PortAverage Response Time: ≤24h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryShandong Longguang Tianxu Solar Energy Co., Ltd. is a China-based limited company established in 2002, with 406 employees and a large manufacturing site in Shandong. The supplier develops and manufactures solar water heaters, solar vacuum tubes, high-borosilicate glass tubes, heat pumps, photovoltaic products, and energy-storage systems. Evidence indicates substantial production infrastructure, including more than 10 production lines, 10 electric furnaces, 70 solar vacuum tube lines, and 3 solar water heater lines. It reports ISO9001:2015 and ISO14001:2015 certification, 72 R&D engineers, 50 quality-control staff, and cooperation involving Tsinghua-related organizations. Export activity is significant, with 71%–90% of sales reportedly from exports and markets including Southeast Asia and the Middle East. However, the provided information does not substantiate after-sales processes, customer case studies, customized manufacturing procedures, or financial reliability.

Supplier typeThe supplier is identified as a limited company based in Zhucheng, Weifang, Shandong, China, while one record categorizes it as a trade company. Its described activities and product range show substantial manufacturing involvement in solar thermal, glass, heat-pump, photovoltaic, and energy-storage products.

CertificationsThe supplier reports ISO9001:2015 and ISO14001:2015 certificates, along with other unspecified certifications. These explicitly support quality-management and environmental-management system credentials, although the unspecified certifications cannot be assessed further.

R&D capabilityThe supplier reports 72 R&D engineers, involvement with Beijing Tsinghua Industrial Development Institute and Beijing Tsinghua Solar Co., Ltd., advanced solar vacuum tube production lines, and work across solar heating, cooling, desalination, heat pumps, and photovoltaic systems. It also states that it drafted a national standard for 3.3 high-borosilicate glass, providing explicit evidence of R&D and technical-development capability.

Production capacityProduction capacity is supported by 406 employees, a 133,340 m² manufacturing plant, more than 10 production lines, 10 electric furnaces, 70 solar vacuum tube lines, and 3 solar water heater lines. The supplier also reports annual production of one million tons of high-borosilicate glass and 16 million solar vacuum tubes, plus lead times within 15 workdays in both off-peak and peak seasons.

Product Q&A

Q:How does the system work in cold climates?

It uses a 50/50 propylene glycol and water mixture that circulates through a coil in the tank, making it the ideal choice for very cold climates to prevent freezing.

Q:What happens if there is not enough sunlight?

An electric or gas backup element will be automatically switched on by the controller to ensure continuous hot water supply.

Q:What materials are used for the inner tank?

The inner tank is made of SUS304 stainless steel with varying thicknesses (1.2mm to 2.5mm) depending on the capacity.

Q:What is the maximum capacity available?

The system is available in capacities ranging from 150L to 1000L, suitable for 3 to 20 persons.

Q:What certifications does the product have?

The product holds CE, ISO9001, CCC, RoHS, CB, and SASO certifications.