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360L Large Capacity Integrated Copper Coil Vacuum Tube Solar Water Heater. Large Capacity: 360L ensures ample hot water supply for homes. Vacuum Tube Technology: Borosilicate 3.3 glass with selective coating enhances efficiency. Energy Saving: Designed for passive heating, reducing electricity consumption. Durability: Galvanized steel bracket provides long-lasting structural integrity. Freestanding Installation: Easy to install and maintain, suitable for various settings. Warranty Coverage: 10-year guarantee period for the whole system. International Certifications: Components passed IEC, CE, UL, and CEC certifications. Customization Options: OEM available with customizable samples.