High Reliability Advanced DSP digital control technology is applied to rectifier and inverter Fan speed varies intelligently with temperature, reducing noise and increasing its service life Rear ventilation design, fan operating in slow speed, UPS being able to work for a long time in harsh environment Effective software and hardware protection function, powerful self diagnostic function Higher reliability than single UPS system with advanced digital parallel technology High Usability LCD+LED display, multi-functional keys operation, friendly human machine interface Powerful background software for parameters configuration and online updating Compact internal layout, miniaturized the complete unit for small footprint High Intelligence Advanced multi-platform communications: RS232, USB, RS485, SNMP and dry contacts communication interfaces Intelligent battery management, automatic floating / equalizing charge control, charger dormancy control, improving the reliability of charger and extending battery service life by 50% Energy Conservation and Environment Protection Active power factor correction (APFC), input power factor up to 0.99 Work efficiency up to 98% in ECO mode Auto power ON/OFF according to the load capacity set by users High Availability Wide input voltage range, self-adaptive 50Hz /60 Hz grid system, suitable for various grid environments Linear derating in low voltage input, reducing battery discharging times, extending the service life of battery Output power factor improved from 0.8 to 0.9, load-carrying capacity increased by 13% Flexible battery configuration for using 14/1 6/1 8/20pcs batteries, saving costs for customers Doubling the battery charging speed, 90% capacity restored in 4 hours for standard model UPS Ability to switch on the UPS with batteries in the absence of mains power UPS power supply mode has no transfer time to ensure uninterruptible power Configurable switching time from battery mode to mains mode when mains power is restored, reducing the impact on power grid or generator Frequency conversion mode: 50Hz input / 60Hz output or 60Hz input / 50Hz output