Key Features��mart double CPU control
  ��Low frequency Line interactive design ��Pure sine wave output THD less than 3%
  ��Automatic self-detection on startup
  ��Adjustable output voltage
  ��Unattended management function
  ��Manual silence/alarm transfer function
  ��LED display for load and battery rate, Line or battery mode and fault
  ��AVR function
  ��Provide lightning, surge, and overload and short-circuit protection.
  ��Cold start function (DC power on).
  ��Auto transfer, the typical transfer time 5Ms.
  ��With Rs232 and software |   |  
  Technical Specifications   Model  | LISW1K(S)  | LISW2K(S)  | LISW3K(S)  | LISW4KS  |  Maximum Output Power(W)  | 1000VA  | 2000VA  | 3000VA  | 4000VA  |  600W  | 1200W  | 1800W  | 2400W  |  Input   | Voltage  | 140-280V or 70-140V ��5V  |  Frequency  | 45~65Hz  |  Output  | Voltage  | 220Vac��10% or 110Vac��10%  |  Frequency  | 50/60��0.5HZ  |  Output Waveform  | sine wave  |  General Protection  | Output Short; Over Voltage; Low-Voltage; Power Utility Short; Low Battery Voltage   |  DC voltage  | 24VDC  | 48VDC  | 48VDC  | 48VDC  |  Charge Current   | 1K-4K  | Max 3Amp  |  1KS-4KS  | Max 15AMP  |  Battery  | Battery Type  | Valve controlled maintenance free sealed lead-acid battery  |  1K-4K  | 2*12VDC/7AH  | 4*12VDC/7AH  | 4*12VDC/9AH  | 4*12VDC/9AH  |  1KS-4KS  | 24VDC External   | 48VDCExternal   | 48VDC External   | 48VDC External   |  Transfer Time(ms)  | Typical 4MS,Max 10MS  |  Overload Protection  | 120%-150% load, hold 10 seconds,150% load hold 1 second  |  Alarm  | when mains input off,UPS beeping 4 times every one minutes, when battery low,UPS beeping once every second  |  Communication Interface  | RS-232 and communication software , , ,  |  Surge protection  | yes  |  LED Display   | Line,Battery,Fault,Battery Rate, Load Rate  |  LCD Display  | ��  | Input Voltage, Output Voltage, Frequency, Bat Voltage, Load Rate  |  Product size  | W*D*H (mm)  | 405*145*220  | 460*192*340  | 460*192*340  | 460*192*340  |  Package size  | W*D*H (mm)  | 501*488*350/2PCS  | 595*335*495  | 595*335*495  | 595*335*495  |  Packing Weight (Standard /Long time) (KG)  | 29/22 (2PCS)  | 34/24  | 37/27  | 38/28  |  REMARK  | LISW*K --- Standard Type, LISW*KS---- Long Time Type. LCD Display optional  |      |  |