UPS Online Ultra Power 20 000VA, Phase 3/1, without batteries, RS-232, SNMP Slot, metal case, LCD 20KVA / 14 000W : Display: LCD Interface: RS-232, SNMP Slot Battery: not included Input voltage range: 380V: 304~478Vac Frequency: 380V: 40~60Hz Aotumatic identification (AC mode) Output voltage range: 220V: 220±2%Vac Transfer time: 0 ms Wave form: : Sine Wave Overload capability: 105%~130% lasts for 10 minutes, 130% above or 1 minute. Protections: 1. Auto re-starts when AC recovers 2. Silence setup 3. Automatic charging (offline charging) 4. Battery low voltage protection 5. Overload & Short circuit protection Gross weight: 44 kg Net weight: 37 kg