... town, countryside, worksites, mountain and pasture as electric power source for lighting purpose, it can also be used ... as back-up power supply in an emergency. The generators are of ... 400V, phase voltage is 230V, frequency is 50Hz. power factor 0.8(lag). According to the customer' ... range of 0.8~1.0, the generators offer constant voltage, when sudden change (increase or decrease) of ...