10000VA/8000Watts, AVR, CPU control, LCD display, Metal, Sine wave, online,external battery ... Loading)Harmonic Distortion Less Than 3% at Linear loading(Full Load) Power Factor0.8Efficiency85%Transfer TimeBattery Mode 0msBypass Mode 2msBatteries& ... input voltage,input frequency,output voltage,output frequency,battery voltage,load Audible AlarmBuzzerAC unusual 4S/Battery low voltage 1S/Overload/ ...