Haining Sunfull Technology - Solar Water Heaters & Systems

About Sunfull Technology

Haining Sunfull Technology Co., Ltd., located in Haining City, Zhejiang Province, is a high-tech enterprise specialized in the research and manufacture of solar water heaters, solar collectors, frames/brackets, and solar vacuum tubes.

Our Commitment to Innovation & Quality

With advanced technology and comprehensive facilities, we have reached an annual production capacity of 70,000 solar water heaters. Our varied series of solar heating systems are designed to satisfy diverse customer requirements across residential, commercial, and industrial applications.

We are proud to have passed the ISO9001 international quality management system certification and hold CE, ROHS, and Solar Keymark quality certificates—ensuring our products meet global safety and environmental standards.

Relying on innovative design, reliable quality, and excellent service, our products are sold in 20 provinces across China and exported to over 30 countries worldwide—including markets in Europe, the Middle East, Asia, Latin America, and Africa.

Our Product Range

From non-pressurized to high-pressurized systems, flat panels to double inner tanks—our solar water heaters combine durability, efficiency, and modern engineering.

SF-NPC3 Non-Pressure Solar Heater

Classic design with durable galvanized steel frame. Ideal for residential use in moderate climates.

• 20° tilt angle
• Vacuum tube collector
• Galvanized steel bracket
• Easy installation

Stainless Steel Solar Water Heater SF-NPS1

SF-NPS1 Stainless Steel Heater

Premium model with corrosion-resistant stainless steel tank and 25° frame for optimal sun exposure.

• 25° frame angle
• Stainless steel inner tank
• High thermal efficiency
• Long lifespan

Copper Coil Pre-Heating System

Efficient pre-heating solution using copper coil heat exchanger for faster water heating.

• Copper coil heat exchanger
• High heat transfer rate
• Suitable for cold regions
• Energy-saving design

High-Pressurized Heat Pipe Solar Heater SF-PS4

SF-PS4 Integrate Heat Pipe Heater

Pressurized system with integrated heat pipe technology for consistent hot water under pressure.

• Pressurized operation
• Heat pipe collector
• All-weather performance
• Anti-freeze capability

Double Inner Tank Solar Water Heater SF-DP

SF-DP Double Inner Tank System

Dual-tank design ensures continuous hot water supply with enhanced insulation and capacity.

• Double inner tank
• Superior insulation
• High capacity output
• Stable temperature control

Flat Panel Solar Heater (Europe Market)

Sleek flat panel design tailored for European architectural standards and cold climates.

• Aesthetic flat design
• CE & Solar Keymark certified
• High wind resistance
• Low maintenance

Split High-Pressurized System

Modular split design allows flexible installation with collector and tank separated.

• Split configuration
• Remote tank placement
• High-pressure delivery
• Ideal for high-rise buildings

Laser Welding Technology Series

Advanced laser-welded connectors ensure leak-proof joints and long-term structural integrity.

• Laser-welded joints
• No corrosion at seams
• Enhanced durability
• Precision engineering

Galvanized Steel Frame System

Robust galvanized steel frame ensures stability and longevity in harsh weather conditions.

• Galvanized steel construction
• Rust and corrosion resistant
• High load capacity
• Long service life

With Aluminum Bracket Model

Lightweight aluminum bracket for easy rooftop installation and reduced structural load.

• Lightweight aluminum
• Easy mounting
• Corrosion resistant
• Aesthetic finish

Strong Frame 38° Angle Heater

Optimized 38° angle for maximum solar absorption in low-latitude regions.

• 38° tilt angle
• Reinforced frame
• High solar gain
• Ideal for tropical zones

Stainless Steel Reflector SF-NPS1R

Enhanced reflector design increases solar absorption by directing more sunlight to tubes.

• Reflective stainless steel
• Boosts efficiency by 15%
• Durable and cleanable
• Weatherproof surface

Why Choose Sunfull?

Decades of innovation, quality assurance, and global trust make Sunfull a leader in solar thermal technology.

Certified Quality

ISO9001, CE, ROHS, and Solar Keymark certified—ensuring international compliance and safety.

High Efficiency

Advanced heat pipe and vacuum tube technology ensures maximum solar energy conversion.

Global Reach

Exported to over 30 countries with proven performance in diverse climates and conditions.

Reliable Service

Dedicated support team and customizable solutions for large-scale solar heating projects.

Frequently Asked Questions

What types of solar water heaters do you manufacture?

We produce a wide range including non-pressurized, high-pressurized, heat pipe, flat panel, double inner tank, split systems, and models with laser welding or copper coil technology.

Are your products certified for international markets?

Yes, our products are certified with ISO9001, CE, ROHS, and Solar Keymark—ensuring compliance with European and global standards.

Can you supply solar systems for large projects?

Absolutely. We design and supply customized solar heating solutions for commercial, industrial, and large residential projects worldwide.

What is the warranty period for your solar heaters?

Warranty varies by model but typically includes 5 years on the tank and 3 years on collectors and components. Contact us for specific details.

Do you offer OEM/ODM services?

Yes, we welcome OEM and ODM collaborations. We can customize branding, packaging, and technical specifications based on your market needs.

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