... 1kva uninterruptible power supply Key features:H series on-line UPS is an advanced true double conversion on-line topology, ... capacity after full load dischargeBypassAutomatic transferOn overload and UPS failureBefore UPS power-onDefault “NO”, user adjustable to “YES ... /battery level, battery , utility power, inverter, bypass, overload, faultAudible alarmBypass, on battery mode, battery low, overload ...