The Seven SS Stars 300L White Non-Pressurized Solar Water Heater is a high-capacity solar hot-water system designed for large households, apartments, guest houses and small businesses that need dependable hot water without relying heavily on electricity.

It uses vacuum tube solar heating technology to absorb solar energy efficiently, while the insulated stainless-steel tank helps retain heat for longer. Its non-pressurized design makes it especially suitable for installations with low or fluctuating water pressure.

☀️ Key Features

• 🚿 Tank Capacity: 300 litres
• ☀️ System Type: Non-pressurized vacuum tube solar water heater
• 🔵 Vacuum Tubes: Approx. 30–35 tubes depending on configuration
• 🧪 Tube Material: Borosilicate glass with selective coating
• 📏 Tube Diameter: 58mm
• 📐 Tube Length: 1.8m
• 🧱 Tank Material: Stainless steel
• 🎨 Finish: White
• 🧊 Insulation: Polyurethane foam
• 🌡️ Maximum Water Temperature: Up to 95°C
• ⚖️ Approx. Empty Weight: 90kg
• 🌞 Designed for efficient solar heat absorption
• 💧 Suitable for low-pressure or gravity-fed water systems
• 🏠 Ideal for larger residential applications
• 🏢 Suitable for small commercial properties

🔥 Vacuum Tube Solar Heating

The system uses evacuated glass tubes to collect solar radiation and transfer the absorbed heat into the stored water.

This technology offers:

• ☀️ Efficient solar-energy absorption
• 🌤️ Useful heating even under less-than-perfect sunlight
• 🔥 High achievable water temperatures
• ⚡ Reduced dependence on electric water heating
• 💰 Lower day-to-day water-heating costs

The retailer specifically notes that the borosilicate vacuum tubes are designed to maximize solar energy absorption.

💧 Non-Pressurized Design

This model is intended for gravity-fed / non-pressurized systems, making it well suited to locations where water pressure is naturally low or inconsistent.

Typical installations can include:

• 🏠 Homes with rooftop storage tanks
• 🏢 Guest houses and small apartments
• 🌾 Rural homes and farms
• 🚿 Properties using gravity-fed water systems
• 🏨 Small hospitality facilities

🧊 High-Quality Heat Retention

The storage tank uses polyurethane foam insulation to reduce heat loss after the water has been heated.

This helps:

• 🔥 Keep water hot for longer
• 🌙 Retain heat into the evening
• ⚡ Reduce the need for supplementary heating
• 💰 Improve overall solar-heating efficiency

✅ Benefits

• Large 300L hot-water capacity
• Uses free solar energy
• Vacuum tube technology
• Low operating costs
• Reduced electricity consumption
• Stainless-steel storage tank
• Effective thermal insulation
• Suitable for low-pressure installations
• Low maintenance requirements
• Environmentally friendly water heating

⚠️ Installation Notes

• 🏠 Install in an area with strong and unobstructed sunlight
• ☀️ Orient and angle the collector correctly for best solar exposure
• 💧 This is a non-pressurized system and should not be connected directly to unsuitable high-pressure plumbing
• 🧱 Ensure the roof or mounting structure can safely support the filled system
• 🔧 Professional installation is recommended
• 🚿 Use appropriate plumbing valves and fittings
• 🧹 Periodically inspect the tubes and keep them clean for good performance