1,Certification: ISO ,Solar Keymark ,SRCC,SABS.SGS 2,7 years warranty ... home applianceCertification:Have passed SRCC,CE,ISO9001:2000,CCC, solar Keymark ,SABS and other certification Features:1) Outer tank ... radiation rate:≤6% Temperature when ecposed to sun without water:250 degree ,2.5 hours to boiling if using ... 402420032/76SP470-1800/58-304.323025026/63 low pressurized solar water heaters