Non pressure solar collectors are also called all-glass vacuum tube solar collectors. There has a selective coating with a high solar absorption rate. It is used for residential and large-scale commercial solar water heating projects.
Energy-Saving Design: Operates without electricity using solar energy and gravity.
No Pump or Controller Required: Fully functional without auxiliary systems.
Vacuum Tube Efficiency: Rapid heating even in partially cloudy conditions.
Highly Insulated Tank: 50mm polyurethane layer keeps water hot longer.
Strong Anti-Corrosion Body: Stainless steel and galvanized materials withstand harsh environments.
Simple Installation: No pressurization setup or complicated plumbing needed.
Customizable Capacity: Ranges from 100L to 300L or more depending on tube count.
Low Maintenance: Very few components, minimal wear and tear.
Applications: Houses, apartments, rural areas, hostels, schools, eco-lodges, and areas without stable power.
Tank Insulation: Thick polyurethane foam offers excellent temperature retention for up to 72 hours.
Frame Angle Options: Tilt design allows for maximum sun exposure throughout the year.
Climate Suitability: Performs best in moderate to tropical environments with strong sunlight.
Tank Inlet/Outlet Ports: Easy-to-connect water pipes, standard G1/2 or G3/4 threading.
Compatible Systems: Can be connected to electric backup heaters or thermostats.
Evacuated Glass Tubes: 47mm or 58mm diameter, 1500mm–1800mm length.
Hot Water Tank: Stainless steel SUS304 inner layer, galvanized or stainless outer shell.
Frame Stand: Powder-coated galvanized steel or aluminum, corrosion-resistant.
Silicone Seals: High-temperature silicone for tube-to-tank connection.
Float Valve (Optional): Automatic filling and water level control.
Electric Heater Rod (Optional): Backup heating during cloudy or rainy days.
Temperature Sensor Port: Allows digital thermometer or controller installation.
Packaging: Secure carton boxes or wooden crates for international shipment.
Tube Protection: Vacuum tubes are packed separately with foam cushioning and individual sleeves.
Shipping Time:
Sample Units: 5–10 working days
Bulk Orders: 15–25 working days
Container Load: Approx. 140–180 sets in a 20’GP depending on model configuration.
Accessories: Each shipment includes tubes, tank, frame, instruction manual, and fittings.
The Ensun-Non Pressure Solar Collector is a reliable and cost-effective solar water heating solution ideal for residential and small commercial use. It operates using natural thermosiphon principles and is constructed from high-grade stainless steel, durable aluminum alloy, and vacuum glass tubes. With no need for pumps or pressurization, it offers low maintenance and high efficiency, making it especially suitable for regions with strong sunlight and stable climates.
The Ensun-Non Pressure Solar Collector is designed as a passive solar water heating system that works on gravity and thermosiphon effects. It consists of high-quality vacuum tubes inserted into a water storage tank insulated with polyurethane foam. The collector is open to atmospheric pressure and designed for direct heating—sunlight heats the vacuum tubes, and hot water rises naturally into the upper tank.
This model is perfect for households, remote areas, and buildings without access to electric pumping systems. It is simple to install, requires no electricity to function, and operates automatically once filled. It’s a practical and economical solution for consistent hot water supply without additional energy consumption.
| Component | Specification |
|---|---|
| Product Name | Ensun-Non Pressure Solar Collector |
| Working Principle | Thermosiphon – natural circulation |
| Pressure Type | Non-pressurized (atmospheric pressure) |
| Collector Type | Vacuum tube solar collector |
| Tube Material | Borosilicate glass (double-layer, 1.5–1.8mm thickness) |
| Number of Tubes | 10 to 30 tubes (customizable) |
| Tank Capacity | 100L to 300L (customizable) |
| Inner Tank Material | Food-grade SUS304-2B stainless steel |
| Outer Tank Material | Colored galvanized steel / Stainless steel |
| Insulation Layer | 50mm polyurethane foam insulation |
| Frame Material | Aluminum alloy or galvanized steel |
| Angle Adjustments | 15°–45° adjustable frame for optimized solar absorption |
| Temperature Range | -10°C to +90°C |
| Lifespan | More than 15 years |
| Certifications | CE, ISO9001, SGS |
Non-Pressure Solar Collector consists of a manifold, tail bracket, solar vacuum tube, seal components, etc. Available in single-side vertical pipe design and double sides horizontal pipe. Solar energy usage is extremely safe and risk-free. All our products have a high-performance and efficient application. It has super insulation, a scientific and reasonable design. Made from all glass vacuum tubes which can resist cold and hot shock and high pressure.
ENSUN Non-pressure solar collector products surely reduce energy costs and provide environmental protection. It has a large quantity of heating water from 40 liters to big size of 600 litter. You can request a customized non-pressure solar collector for your business. Cost-effective solar collector with a high return on investment. Send your specifications today. Our team will help you find the right solution for your projects!
SUNECO Solar Technology has an experienced team dedicated to ensuring the highest standards in solar water heating performance. We are committed to delivering personalized customer solutions and ensuring long-lasting product reliability in every installation. Your orders for solar heating systems are closely monitored and implemented to maintain superior product quality from production to delivery.
SUNECO’s solar thermal division operates 24 hours a day, 7 days a week, ensuring responsive service and support across all time zones and regions. Whether you need a solar water heater for a home, a custom solar collector for a commercial building, or accessories for a full installation, SUNECO is ready to serve with consistent excellence and technical expertise.
