TECHNICAL SPECIFICATION : - Model & Type : ST-1023B / OFFLINE Interactive Sinewave - Capacity : 2000 VA / 1000 W - AC Input Voltage : 160V ~ 250V (single-phase) - AC Input Frequency : 50Hz 3% - AC Input Protection : 10 A - DC Input Voltage : 36 V - DC Input (Internal Battery) : 3 x 12V/7Ah (SLA Battery) - DC Input Protection : FUSE - Charging Topology : Constant Voltage - Charging Floating Voltage : 40.8 V - INVERTER Output Wave Form : SINEWAVE - INVERTER Output Distorsion : < 3% THD (Load 0-100%) - INVERTER Output Topology : Pulse Width Modulation (PWM) - INVERTER Output Voltage : 220V 2% (single-phase) - INVERTER Output Frequency : 50Hz 1% - INVERTER Output Efficiency : 80% (At Full Load) - Transfer Time When AC Input Fail : 4ms - Back Up Time : 10 min (At Nominal Load) - BUZZER AC Input LOW/Fail : INTERMITTENT SOUND WITH 4 SECONDS INTERVAL - BUZZER AC Input HIGH : INTERMITTENT SOUND WITH 1 SECONDS INTERVAL - BUZZER Battery Low : INTERMITTENT SOUND WITH 1 SECONDS INTERVAL - Operation Temperature : 0 - 40C - Dimension (D x W x H) : 505 x 140 x 200 mm