250L White Non-pressurized solar Water Heater

A 250L White  Non-Pressurized Solar Water Heater is an efficient, cost-effective, and eco-friendly system designed to provide hot water using solar energy. It is ideal for medium to large households or small businesses that require a reliable and energy-saving water heating solution.

Key Features:

• Capacity: 250 liters (suitable for 4-6 people).
• Tank Material:
  • Inner Tank: Stainless steel (SUS304 or SUS316) for hygiene and durability.
  • Outer Tank: White-coated steel or stainless steel for weather resistance.
• Non-Pressurized System: Uses gravity flow instead of a pump, making it simple and cost-effective.
• Solar Collector:
  • Vacuum Tubes: Made of high-efficiency borosilicate glass to absorb solar heat.
  • Tube Count: Typically 25-30 tubes, depending on the model.
• Insulation: Thick polyurethane foam (PUF) to retain heat for extended periods (up to 24 hours).
• Frame: Galvanized steel or aluminum, ensuring stability and weather resistance.

How It Works:

1. Water Fills the System: Cold water enters from a supply tank.
2. Sunlight Absorption: The vacuum tubes absorb solar energy, heating the water inside.
3. Natural Circulation: Heated water rises to the storage tank, while cooler water moves down for heating.
4. Hot Water Availability: The insulated tank keeps water warm for use, even after sunset.

Advantages:

✅ Energy-Efficient & Cost-Saving – Uses solar energy, reducing electricity and gas costs.
✅ Eco-Friendly – No carbon emissions, making it a green alternative.
✅ Low Maintenance – No moving parts or electrical components.
✅ Long Heat Retention – Insulated tank keeps water warm for long periods.
✅ Simple Installation – Can be mounted on rooftops or elevated stands.

Disadvantages:

❌ Gravity-Dependent – Works best when installed at an elevated position for proper water flow.
❌ Weather Dependent – Performance is lower on cloudy or rainy days (backup heating may be needed).
❌ Large Space Requirement – Requires sufficient roof space for installation.