F series Separate Solar Water System is open loop system with directl flow collectors and non pressurized tank, which is consisted of four components:

solar collectors, storage tank, solar station and controller.  "Separate" means the solar collectors is apart from storage tank.  The solar collector shall be installed outdoors, at the mean time, storage tank placed indoors, solar station, under the control of the controller, complete the operation of solar loop circulation, cold water supply, hot water withdraw and recirculation. F series Solar Water System is the integration of high performance purple evacuated tubes, innovated solar station, tailor-made controller, direct flow collectors and storage tank.  The novel design focuses on high quality and stable operation for the long term, but all achieved at low cost.