Features: 1.Handsome appearance. be integrated with the architecture with no clash with the building appearance. 2. Easy installation. Could be installed on the roof with any slope, on the balcony or hung on the wall. 3. Use most advanced absorptive coating and high quality copper material guaranty high heat absorption and transformation efficiency. Absorptance >93%, Emittance <8%. 4. Handpicked strong intensity cover glass. Resistance 25mm diameter hail attack. 5.Thick glass wool insulation make sure max. thermal reservation. combined double-layer glass vacuum tube and copper heat pipe as one unit. 3. Absorption coefficient >92% (AM1.5) , Emission coefficient <8% (80℃), Vacuum P<5x10-3Pa, Stagnation temperature >230℃. Freezing resistance: -35℃ 4. Corrosion resistant silver brazed copper condenser. 5. Maintenance free, warrant your enjoying clean hot water for years. 6. Easy plug-in installation with hermetic insulation layer promise the max. thermal reservation. 7. Perfect modular solar collector for domestic solar water heater system and commercial application.