Uncompromised Quality in Every Solar System
At Redsun Solar Industries, quality isn't just an inspection check — it's built into every design, weld, and assembly.
Heavy-Gauge Stainless Steel (SS304/SS316)
Our inner water storage tanks are fabricated using food-grade, corrosion-resistant stainless steel with argon-arc automatic welding, preventing oxidation and scale buildup even with hard water conditions.
High-Density PUF Thermal Insulation
Injected polyurethane foam (PUF) insulation with a density of 38-40 kg/m³ ensures minimum heat loss overnight, keeping your water scalding hot for over 48 hours without auxiliary power.
Three-Target Evacuated Glass Tubes
Borosilicate glass 3.3 vacuum tubes with AL-N/AL selective absorption coating ensure >93% solar radiation absorption with minimal thermal reflection, operating efficiently even in cloudy weather.
Multi-Stage Pressure & Leak Testing
Every tank and manifold array undergoes hydrostatic pressure and pneumatic leak testing under strict laboratory supervision before leaving our factory floor.
Technical Quality Benchmarks
| Component | Redsun Specifications | Standard Industry Products |
|---|---|---|
| Inner Tank Material | SS-304L / SS-316L Heavy Gauge | Thin Gauge Commercial Steel / Mild Steel |
| Thermal Insulation | 50mm High Density Injected PUF | Glasswool / Low-grade insulation |
| Glass Vacuum Tubes | Borosilicate 3.3 Three Target (ALN/SS-ALN/CU) | Ordinary single/double target glass |
| Stand Structure | Galvanized Steel with Pure Polyester Powder Coating | Ordinary painted mild steel (Rust prone) |
| Heat Retention | Up to 48-72 Hours | Less than 24 Hours |