... the country. 8)Prediction warning systemLCD panel automatic detection function and timely warning in advance, with the boot self ... , the users can set system parameters, date, output voltage, battery capacity, alarm function, light-load shutdown, system boot time, MODEM settings, ... 60HZ±0.05%(Battery)Harmonic distortionLinear Load<3%, Non-linear Load<5%Imbalance voltageBalance load≤1%,Imbalance load≤3% ...