(1) high "220V AC Cooling Fan" safety and reliability of power supply due to the various parts of relatively independent, redundant or spare battery technology is more convenient, less local electrical power, cooling and security measures are easy to implement, part of a power failure Assembly does not affect the normal operation of the entire system.
(2) "220V AC Cooling Fan" adaptability due to split up the entire power system, each part of the power to select more flexible, easier to achieve optimal configuration. Furthermore, the same design, slight modifications can be used in other systems. More notably, in the latter part of the system design if you need to modify the program, it is only partial changes without having to redesign the entire "220V AC Cooling Fan" system, making the system easier and reduce the number of remodeling waste.