... China Hitek Solar Co., Ltd.Split solar water heating system:include 1 set 70-10tube ... solar collector,1 pc 100L water tank,1 set solar station,1pc expantion ... 58 series or NSC-70 series)Storage water tank (with heat-exchanger)Expansion tankSolar controllerPump ... in heating, saves electricity up to 30,000kW/h each year, eliminating 200 tons Split solar water heating system/Home use solar water ...