solar water heater collector , solar water heater, split solar water heater,CE,EN12975,KEYMARK Product Description Solar Collector Features: Evacuated tubes convert solar energy into thermal energy that is transferred ... .0 MPa, this system has a working pressure of 0.6 MPa. 2Solar water heaters can still work even with ... .0MPa Working pressure 0.6MPa Daily efficiency >50% solar water heater collector