... *1000 *80mm for reference)20GP: 120(with wooden tray)/140pcs40GP: 185pcs (with wooden tray)/320pcs40HQ': 340(with wooden tray)/530pcs ... it visually less obtrusive and compatible with existing architectural designs.ApplicationThe water heating systems for commercial, buildings, hotels, hospitals, ... Europe ,Southeast Asia, Mid East ,Western Europe. 2012 Newest Patented flat panel solar collector system