Solar Thermal Manufacturer & OEM Partner
We Are Trusted Solar Thermal Manufacturer
Millionsun Solar is a high-tech enterprise integrating R&D, full-process production, sales, and professional technical service in solar thermal energy industry. Located in Dongguan — one of China’s premier manufacturing cities — we specialize in flat plate solar thermal by providing with OEM / ODM Production & Custom Solution service.
Founded in 2006, today we are one of the largest solar thermal production bases in South China, partnering with leading universities to bring the latest solar research to market.
Find What Fits Your Business
Quick response to ship the flat plate solar collectors and related solar water heater products to your desination. Consistent quality, competitive pricing, reliable lead times.
Your brand, your specs —our factory. From absorber size and coating type to packaging and labeling, we build it your way.
Need custom specifications, bulk pricing, or professional technical support? Our engineering team speaks your language.
Unsure which model fits your market? Request samples to evaluate quality, performance, and compatibility first.
Our Product Range
Our best-selling product — trusted across Europe, America, and Australia.
Flat Plate Solar Collector
Food-grade SUS304 OR 316L stainless steel inner tank, optional outer casing.
Solar Water Tank
We have the full-process production for flat plate solar water heater.
Flat Plate Solar Water Heater
Uses solar panels to heat water — no gas, no grid, no pipe line needed
PV-Powered Water Heater
We supply CKD key component for flat plate solar collector, water tank, bracket and related products for your local production.
CKD Key Component
See Our Factory in Action
What We Offer — From Production
to Partnership
Production Process
100% Traceable
Flat plate solar collector production:
Absorber coating → Welding (ultrasonic or laser)
→ Auto punching → Copper tube welding
→ 100% pressure test (every single unit)
→ Auto frame assembly → Glass cover assembly
→ Serial number assigned → Final inspection → Packaging
Solar water tank production:
Stainless steel plate cutting & rolling → Inner tank TIG welding
→ Heat exchanger coil welding → Nozzle hole punching & fitting welding
→ 100% hydrostatic pressure test (each tank) → Outer shell forming
→ Polyurethane integral foaming insulation → Electrical element assembly
→ Final tightness inspection → Unique serial number marking
→ Overall finished inspection → Packaging
R&D Capability
- In-house absorber coating formula development
- Continuous improvement on welding and assembly processes
- Custom product development for OEM/ODM clients
OEM/ODM
Service
- Specification customization — collector or tank size, materials, color, regional climate adaptability, residential or commercial application, etc.
- Branding — your logo, your label, your packaging design
- Flexible MOQ — from trial orders to container loads
- Confidentiality — your design and specs stay yours
After-Sales
Service
- Dedicated account manager for every OEM partner
- Technical documentation and installation manuals in multiple languages
- Spare parts support for the full product lifespan
- Responsive communication — we reply within 24 hours
Trusted by Partners
Worldwide
Rachel Jackson
Joni Tri
Ahmed Al Rashid
Flat plate collector 2.0m²
500 units
Delivered 35 days, 0 defect rate
Blue coating collector 1.5m²
OEM partnership
Passed Keymark audit on first try
PV water heater
120 units
Installed and operational
Why Millionsun Solar?
Full Vertical Integration
We control the entire chain — from key component to complete solar water heater system. This means better quality, faster turnaround, and lower cost for you.
Industry Testing & Certificate Coverage
Your target market's certifications or tests required are ready. No need to start from scratch.
Long-term Warranty
Every flat plate collector with 10-year warranty & tank with 5 year-warranty, backed by 20 years of manufacturing experience and full product traceability.
University R&D Partnership
We collaborate with leading Chinese universities to transform the latest solar thermal research into production-ready technology.
Quick Answers to Common Questions
What is the minimum order quantity?
We are flexible. For standard flat plate collectors, we accept orders starting from [50/100] units. For OEM/ODM projects, MOQ depends on customization level — contact us for a tailored quote.
Can I get a sample before ordering?
Yes. Sample orders are welcome. We can ship 1–2 units for you to evaluate quality, dimensions, and performance.
What are the typical lead times?
- Standardleadtime: 15–20 days
- OEM/ODM orders: 25–35 days (depending on customization)
Can you customize with my brand?
Absolutely. OEM/ODM is our core business. We customize:
- Brand logo and labeling
- Packaging design
- Absorber coating type(black or blue)
- Size of flat plate solar collecto or solar water tank
- Frame color and profile
- Technical specifications within manufacturing range
How do you ensure quality?
Every collector and water tank goes through:
- 100% pressure test before assembly
- Serial-number tracking from production to shipment
- Third-party audits for Keymark, SRCC, CSA, and TUV certification
Ready to Start Your Solar Thermal Project?
Call Us Directly
+86-769-21682567
+86-769-22020366
Drop Us an Email
info@millionsun.com
info@millionsun.com
Visit Our Studio
Baoqing Industrial Park, No. 18 Guangming Road, Dongcheng District, Dongguan