Thermosyphon Solar Water Heater
Manufacturing & Supply
- Home
- Solar Water Thermosyphon System
Solar Water Thermosyphon System
Millionsun specializes in OEM and ODM manufacturing of solar water thermosyphon systems for distributors, solar brands, EPC contractors, and installers worldwide.
Tank sizes range from 150L to 400L, with collector configurations from 1 to 3 units. We supply as complete systems, CKD/SKD kits, or fully customized solutions.
Key Features & Performance
Natural Thermosyphon Circulation
Natural convection operation, no circulation power or mechanical moving parts.
Open-Loop Direct System
Direct water heating without heat exchanger/antifreeze; lower cost & easy maintenance.
High-Efficiency Flat-Plate Collectors
95% absorptivity black selective coating, copper channels, ≥92% transmittance glass, laser welding for superior heat transfer.
Robust Storage Tank
1.5mm SUS304/SUS316L horizontal liner, painted steel shell, 50mm glass wool insulation.
Optional Electric Backup
1500W–3600W auxiliary heating for cloudy weather and nighttime hot water
Easy Installation
Complete all-in-one kit. Fits flat/sloped roofs, simple plumbing connection, no complicated commissioning.
Compact Integrated Structure
Slim integrated rooftop unit, saves valuable roof space.
Solar Water Thermosyphon System Specifications
| Model | C-TS150L/2 | C-TS200L/2.5 | C-TS300L/4 | C-TS400L/6 |
|---|---|---|---|---|
| Tank type | M-ST/150L-TBP | M-ST/200L-TBP | M-ST/300L-TBP | M-ST/400L-TBP |
| Tank volume | 150L | 200L | 300L | 400L |
| Collector type | M-SBC/2.0-Black | M-SBC/2.5-Black | M-SBC/2.0-Black | M-SBC/2.0-Black |
| Collector quantity | 1 | 1 | 2 | 3 |
| Collector Area | 2.0m² | 2.5m² | 4.0m² | 6.0m² |
| Suitable for roof | Flat or Slope | Flat or Slope | Flat or Slope | Flat or Slope |
| System weight | 120 kg | 150 kg | 190 kg | 240 kg |
| 20GP / 40HQ | 39 / 80 | 32 / 66 | 24 / 52 | 21 / 46 |
| Number of persons | 3–4 | 4–6 | 6–8 | 8–12 |
| Main Components | ||||
| Tank | Tank type: Horizontal tank, volume from 150L to 400L. Inner material: SUS316L (1.5mm) or SUS304. Outer material: Painted steel or SUS304. Electric backup: Optional 1500W–3600W electric heating element. | |||
| Collector | Size: 2000 × 1000 × 80mm (2.0m²) or 2000 × 1250 × 80mm (2.5m²) Cover material: 3.2mm low-iron patterned tempered glass. Absorber material: Black selective coating with aluminium sheet. Header tube: Φ22 × 0.6mm. Riser tube: Φ10 × 0.5mm. Insulation: Fiberglass wool. Backsheet: Aluminium plate. | |||
| Bracket | Material: Aluminium alloy. Installation angle: 15°–60°. | |||
| Accessories | T&P valve, air valve, copper fittings, circulation pipe and insulation. | |||
What we offer?
OEM & ODM Manufacturing Support
Private Label Production
Electric Backup Options Available
Residential & Commercial Applications
Complete System or Component Supply
Technical Documentation & Engineering Support
Custom Project Solutions
Customized tank capacities and multi-collector configurations are available for OEM customers and commercial projects. Tank specifications, collector size, and backup heating can be specified per project requirement.
Recommended Applications:
Single-family homes
Villas
Holiday houses
Small residential projects
Business Value
Product Comparison — Why Thermosyphon Wins
How the System Works
1
2
3
4
5
6
Manufacturing & Supply Capabilities
OEM Manufacturing
Millionsun makes solar water heating products for partners worldwide.
Our Factory
- 8,000 m² Production Facility
- 80+ Employees
- 6 Automated Production Lines
- Dedicated tank production workshop
- Tank production since 2010
- Tank output: 4,000 units per month
Supply Options
- Complete systems (rooftop-ready)
- CKD / SKD kits
- Components only
- Private label
- Custom builds
Technical Resources Center
Frequently Asked Questions
Do you offer OEM service?
Yes. We make products for your brand. Tank size, collector spec, and packaging — all customizable.
What tank sizes do you offer?
150L, 200L, 300L, and 400L standard. Custom sizes available for projects.
How is a thermosyphon system different from a split system?
Does it work without electricity?
How long does installation take?
What is the system weight?
What support do you provide?
Request OEM Quotation
Visit Our Factory
Building 14, Baiwang Science and Technology Park, No.40, Chuangxing North Road, Gaobu Town, Dongguan City, Guangdong Province, China