... CE,RoHS, ISO certificates; 2. split pressurized; 3. warranty:1year for electric parts, 5years for vacuum tubes, CHARACTERISTICS 1. Module design, ... 50mm thickness Bracket: Aluminum Alloy, 1.8mm thickness Solar collector: Jinta heat pipe vacuum tube solar collector series Working station: circulation pump, Flowing meter , ... 10 bars) Warranty: 5 Years for the full system /15 Years for the vacuum tubes.