800L (198 Gal) Stainless Steel Solar Water Heater
$6,568.35 on Amazon.com (as of October 16, 2026, 12:13 AM EST) View details ↗
The Duda Solar 800-liter (198-gallon) stainless steel solar water heater delivers reliable, high-efficiency hot water for residential and commercial applications. Built with a food-grade SUS 304-2B inner tank and a durable galvanized steel outer shell (0.5 mm thick), it ensures long-lasting performance even in demanding environments. The high-pressure polyurethane insulation (density: 36 kg/m³, R-value: 12.5) minimizes heat loss, maintaining water temperature efficiently for extended periods.
Featuring a dual copper coil heat exchanger made from TU1 (red copper) with a 1 mm thickness and 66 ft total length, this system maximizes heat transfer for optimal solar energy absorption. All critical connections—including 3/4″ NPT water ports, 1/2″ MPT coil ports, and 3/4″ T/P valve/drain ports—are designed for easy installation and maintenance. Ideal for solar thermal systems, this tank combines durability, efficiency, and professional-grade construction to meet the needs of large-scale hot water demands.
| Inner Tank Material | Food-grade SUS 304-2B stainless steel |
|---|---|
| Outer Tank Material & Thickness | Galvanized steel (0.5 mm) |
| Insulation Type & R-Value | High-pressure polyurethane (R-12.5) |
| Heat Exchanger Material & Length | TU1 copper (red copper), 66 ft total length |
| Water Port Size | 3/4″ NPT |
| Coil Port Size | 1/2″ MPT |
