UPS Online Ultra Power 20 000VA, Phase 3/1, without batteries, RS-232, SNMP Slot, metal case, LCD20KVA / 14 000W : Display: LCDInterface: RS-232, SNMP SlotBattery: not includedInput voltage range: 380V: 304~478VacFrequency: 380V: 40~60Hz Aotumatic identification (AC mode)Output voltage range: 220V: 220±2%VacTransfer time: 0 msWave form: : Sine WaveOverload capability: 105%~130% lasts for 10 minutes, 130% above or 1 minute.Protections:1. Auto re-starts when AC recovers2. Silence setup3. Automatic charging (offline charging)4. Battery low voltage protection5. Overload & Short circuit protectionGross weight: 44 kgNet weight: 37 kg