When failure is not an option, the Premium Online Series UPS Backup Power Systems provide the cleanest power for mission critical, sensitive, and high-end systems. A completely isolated pure sine wave output provides perfect power free from noise and distortion for optimal system performance while the double conversion topology guarantees maximum system uptime. Front accessible batteries and remote IP management simplify maintenance and put you in control. The Premium Online Series UPS Backup Power Systems have a wide range of capacities, safeguarding any application. Permanent connection to the battery for zero transfer time eliminating system disruptions and guaranteeing maximum uptime Complete isolation and conditioning of output power with double conversion topology providing the cleanest power possible Reduced ambient noise with quiet variable speed fans Longest run time available in this form factor with the capability to add up to 10 expansion battery packs Front accessible, hot-swappable batteries to eliminate downtime related to UPS power maintenance Pure sine wave output waveform automatically corrects over-voltage and under-voltage conditions Non-critical load shedding EMI/RFI filtering for clean power of connected equipment Monitoring and reporting for real time battery life notifications Removable LCD display & power switch for remote accessible functionality Flexibility to set the output frequency to match connected equipment Remote monitoring and control of power with optional IP card 30A capability twist lock receptacles for larger equipment UPS-OLEBPR-1 expansion battery pack is compatible with this unit UPS-OLRBP-1 replacement battery pack is compatible with this unit