... Collector may be installed either on the roof or wall while water tank may be installed at any place ... Solar collector can be installed on roof, balcony or wall of flat, sloping or vertical sides.And the storage ... 40ft container11. OEM,ODM offered.12. To serve Europe, America, Africa clients better, at work in Europe work time ... ,Solar keymark,SRCC,En12975 ,suitable for Europe and North America market