100L Split Pressurized Solar Water Heater with Evacuated Vacuum Tube Solar Collector
100L split pressurized solar water heater adopts separated structure: evacuated vacuum tube collectors are mounted on rooftop, while the 100L pressurized storage tank is installed indoors. It works by pump‑driven closed‑loop forced circulation with antifreeze heat‑transfer fluid. Internal copper coil completes indirect heat exchange, drinking water is fully isolated from antifreeze medium. The whole tank bears municipal tap‑water pressure to provide stable high‑pressure hot‑water output. Perfect for villas, apartments and renovation projects where rooftop cannot bear heavy integrated‑type units. Optional electric backup heating guarantees 24‑hour domestic hot‑water supply for bathing, laundry and kitchen usage.
Working Principle
- Rooftop‑mounted borosilicate evacuated vacuum tubes absorb solar energy and heat the antifreeze medium inside collector loop.
- The circulation pump drives hot antifreeze fluid flow into the indoor storage tank, transferring heat to domestic tap‑water via internal copper heat‑exchange coil.
- Cooled antifreeze flows back to evacuated tube collectors for next heating cycle, forming closed‑loop circulation.
- The 100L storage tank is fully pressurized, directly connected to municipal water pipeline to deliver steady shower pressure.
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When solar irradiation is insufficient, built‑in electric heating automatically compensates heat to ensure round‑the‑clock hot‑water supply.
Important note: Requires power supply for circulation pump. Closed‑loop antifreeze medium provides reliable freeze‑proof performance for cold‑climate regions.
Core Technical Specifications
‑ Tank Capacity: 100 Liter ‑ Inner Tank Liner: SUS304 / SUS316L food‑grade stainless steel; replaceable magnesium sacrificial anode rod for anti‑corrosion ‑ Insulation: 45‑55 mm high‑density closed‑cell polyurethane foam, low heat loss ‑ Working Pressure: 6‑8 bar full pressurized design, equipped with pressure relief safety valve ‑ Solar Collector: Borosilicate 3.3 evacuated vacuum glass tubes, high‑selectivity absorbing coating; standard size Φ58‑1800 mm ‑ Heat Exchanger: High‑efficiency internal copper coil ‑ Circulation: Electric pump driven closed‑loop forced circulation, solar controller included ‑ Heat‑transfer Medium: Antifreeze glycol fluid for cold‑weather anti‑freeze ‑ Auxiliary Heating: Optional 1500‑2000W built‑in electric heating element ‑ Outer Casing: Color‑coated galvanized steel or stainless steel sheet ‑ Bracket: Galvanized steel anti‑rust mounting frame for vacuum tube collectors ‑ Typical Service Life: 14‑19 years with regular maintenance ‑ Certifications: CE, ISO9001, Solar Keymark available for export
Application Scenarios
‑ 2‑4‑person household domestic hot‑water ‑ Houses / apartments with limited rooftop load‑bearing capacity ‑ Projects requiring tank installed indoors (balcony, utility room) ‑ Cold‑climate regions with long‑term sub‑zero temperature ‑ Residential hot‑water renovation upgrade
Collectors need minimum 4‑6 hours direct sunlight daily, avoid shading from trees or buildings.
| Feature | 100L Split Pressurized Evacuated‑tube Solar Heater | Thermosyphon Integrated Solar Water Heater | Split Flat‑Plate Pressurized Solar System |
|---|---|---|---|
| Layout | Collectors on roof, tank indoors | Tank + collectors both installed on rooftop | Flat‑plate collectors on roof, tank indoors |
| Circulation | Pump‑driven forced circulation | Pump‑free natural thermosyphon | Pump‑driven forced circulation |
| Power Requirement | Need power for circulation pump | No power for solar heating | Need power for circulation pump |
| Freeze Protection | Excellent, antifreeze glycol closed‑loop | Pipeline anti‑freezing treatment required | Excellent, antifreeze glycol closed‑loop |
| Rooftop Load‑bearing | Only bear collector weight, low load | Heavy full‑water unit, high roof load requirement | Only bear collector weight, low load |
| Installation Flexibility | High, tank can be placed inside room | Limited, tank must sit above collectors | High, tank can be placed inside room |
Key Buying Considerations
- Installation condition: Evacuated tube collectors mount on roof; storage tank is placed indoors, power supply needed for circulation pump and controller.
- Tank material: SUS316L inner tank is recommended for coastal salt‑spray and high‑hard‑water areas; confirm magnesium anode rod is included.
- Antifreeze liquid: Need to fill qualified glycol heat‑transfer fluid according to local lowest ambient temperature.
- Quotation confirmation: Check whether solar controller, circulation pump, antifreeze fluid and accessories are included.
- Export compliance: Prepare target‑market required certifications for customs clearance.
Installation & Routine Maintenance
Installation must be completed by certified professional installers. Adjust evacuated tube tilt angle according to local latitude. Complete pressure leakage test before system startup. Never activate electric heating before tank is fully filled with tap‑water.
‑ Every 3‑6‑month inspection: Check vacuum tube integrity; inspect pump, controller and pipeline joints for leakage. ‑ Every 1‑2‑year professional service: Replace consumed magnesium anode rod; inspect copper coil heat‑exchange performance; test antifreeze fluid concentration.
FAQ
Q: What are the main advantages of split pressurized evacuated‑tube solar water heater?
A: Separated layout reduces rooftop load pressure. Storage tank is placed indoors to reduce heat loss. Closed‑loop antifreeze system adapts to cold winter regions. Full‑pressurized tank provides stable tap‑water‑level hot‑water pressure.
Q: Will it stop working when power cuts off?
A: The circulation pump will stop without power, solar heat cannot transfer to tank. Backup electric heating also fails. Can add backup power supply if required.
Q: How much energy can 100L split solar water heater save?
A: Under sufficient sunlight condition, solar energy covers 65‑80% of household hot‑water consumption, effectively reducing electricity and gas bills.
Final Conclusion
100L Split Pressurized Solar Water Heater with Evacuated Vacuum Tube Solar Collector is a reliable closed‑loop solar hot‑water solution. Separated layout puts vacuum tube collectors on rooftop and pressurized tank indoors, greatly lowering rooftop load‑bearing requirement. Forced circulation with antifreeze glycol adapts to cold climate. Full‑pressurized output plus optional electric heating achieves stable 24‑hour domestic hot‑water supply. Actual performance depends on standard installation, correct antifreeze filling and regular maintenance.
