... Cost-optimal CE,ISO9001,SGS,CCC OEM Compact/non-pressurized solar water heater,200LSimple structure and working principleCost-optimalCE,ISO9001,SGS,CCCOEM Material ... resistance:25mmCapacity:100/120/130/160/195/235L(47*1500);150/180/200/240/300/360L(58*1800) Compact /non-pressurized solar water heater 200L/manufacturer