The Online Series is designed for those applications requiring maximum power protection. With its double conversion design and Zero transfer time, it provides clean and seamless Pure Sinewave power to critical loads. The optional SNMP card connectivity enables remote management capabilities, including: monitoring and testing of power conditions for multiple clients across a network. The front LED panel displays all major UPS power information, which significantly increase manageability and ease of control. The Online Series offers three choices for communication, including: RS232, RS232-USB, or SNMP/AS400 card. Extended runtime (XL) battery packs can also be added to these units which boost runtimes, in event of a power outage. Input and output EMI filters increase the immunity of the load to disturbances and surges, even in bypass. The Online Series also incorporate microprocessor-based full digital control, and include PowerPanel® Business Edition, which gives the user unsurpassed control and flexibility over power management options. The OL1500RMXL2U comes with three (3)12V/9Ah batteries (36V), and eight (8)NEMA 5-20R receptacles. Through its advanced and smart power management, the Online Series is the ideal power protection solution for networks, servers, telecommunications systems, date storage facilities, as well as industrial applications. * Pure Sinewave ¿ The UPS generates energy that is identical to or cleaner than the utility company¿s power grid. Benefits include: low total harmonic distortion, minimal electrical noise, optimal line clarity. * Extended Runtime (XL) Battery Expansion - The XL battery expansion port allows for the addition of multiple battery packs to increase back-up time. * LED Front Panel ¿ Immediate vital system information: load capacity, battery capacity, fault status, and bypass status. * PowerPanel® Business Edition * 3-year Warranty