... range. Zero transfer time. 6-20KVA LED Online UPS, CPU control ,IGBT , High Reliability Comprehensive Self-Protection Design, ... Audible AlarmHT series online UPS 6-20kVA characteristics:1. True online double conversion technology2. IGBT PFC technology. ... loadOverload capability105%-130% for 10 minutes, 130% for 1 minutesCrest factor3:1Battery TypeSealed, maintenance free, lead-acidBackup time5 ...