... . ISO9001,ISO14001,CCC,ISO,CE, Solar Keymark certificate 2. Flat plate collector solar flat panel:1.reliable,efficient,twin-glass evacuated tubes2 ... your fuel cost.7.domestic and commercial use ,sidite solar collector is ideal for both domestic and commercial use,and ... made in germany;base plate of panel:marine-grade H3004 Aluminumglass of panel:special glass for panel with ANS1297-1-1975,BS6206A AND ...