... , durability and usability; 2. Can quickly convert solar energy into heat and electricity, won national patent;3. Reliable, efficient, tri ... of glass coating, heat efficient, D58 , L1800mm.Qty. of solar tubes12pcs, 16pcs, 18pcs, 20pcs, 24pcs, 30pcs, 36pcs.Inner tank0 ... %After-sale services 15 years warranty Specifications of JiXiangQuan Solar Water Heater: ITEM NO.Qty of tubesDiameter of tubesLength ...