Main FEATURES 
  True on-line double conversion technology with advanced microprpcessor control 
  Wide input voltage 
  Zero transfer time 
  Protection against all types of power problems 
  No add-on CNTL unit required for parallel connection 
  Site wiring fault warning 
 Low initial investment and flexible for future wxpansion
 Highest reliability and maximem performance for power sharing and redundancy 
 Equipped with Maintenance Bypass Switch 
HP9110E/HP9310E  Smart RS232 communication interface
 Intelligent slot available 
 Sesle lead-acid,maintenance free battery