... capacity: 150L,200L,250L,300L,400L,500L,600L,700L,800L............solar water collector1) Reliable, efficient, twin-glass evacuated tubes2) ... and reducing your fuel cost13) Domestic and commercial use, solar collector is ideal for both domestic and commercial use, ... for the whole system,10 years for vacuum tubes3.module design,arbitrary combination,harmonize with the building perfectly4.intelligent ...