U-16 U Tube Solar Collectors Features - Utilization all year round even in cold climates; - Can operate with water pressure up to 0.6MPa; - The collector will still operate in the event of occasional tube breakages; - Modular system means easy handling, installation and can be extended to cover larger areas; 7 panels can be connected in series. - Easy to install on roofs, balconies or fa?ades; - Can be combined with existing energy source; - Quasi-tracking in all seasons. Controlling Solution - Temperature differential control; - 220V AC output to control pump and electric resistor; - Large liquid crystal (LCD) display; - Back up energy source control; - Frost protection; - Remote monitor optional