--- EL-2K 2000VA/1400W Front Panel: LCD Display AC Mode: Input voltage range: 145~275Vac Input frequency range: 60/50Hz (Auto sensing) Output voltage range: 200~240Vac Overcurrent Protection: Breaker Inverter Mode: Output voltage range: 220Vac±5% Output frequency: 50±0.5Hz / 60±0.5Hz (Auto Sensing) Power factor: ≥0.6 Output wave form: Pure sine wave Transfer time: Typical 2~6ms, Max.10ms. Overload capability: Automally shut down in 60sec while with 110% load, and shut down in 5sec while with 120% load Overcurrent Protection: System shuts down automatically within 20ms BATTERY: Battery model: Sealed maintenance-free lead-acid batteries DC Voltage: DC 48V QTY & capacity of battery: 4pcs*12V7Ah Charging current: 1.5A Charging period: 6~8 hours recover to 90% capacity PROTECTION: 1. Auto re-starts when AC recovers 2. Automatic charging (offline charging) 3. Battery low voltage protection 4. Overload & Short circuit protection 4.Over current protection (Breaker for AC mode; System automaticlly shut down wihin 20ms in Inverter mode). Unit dimension (mm): 455*195*330 mm Unit weight ( kg): 30.2 kg