W series Features: Software and hardware intergration design UPS uses innovation software procedure control model, not only reduce the vol.,but also reduce the failure rate. W has strong antijamming ability.With the RS232 ports,you can modify the output voltage and frequency without open the machine. High input power factor The power input uses power fator correction technology (PFC), make input power factor over 0.95,completely remove UPS'S pollution to mains. Because of saving energy sources, it is considered as a green power. Startup self-check Wide input voltage and frequency range The input voltage range is 120-300VAC(-45%+40%),it can fit for vile power environment,reduces discharge time of battery enable battery life extending.Wide input power range (47Hz53Hz) ensure UPS can be supply power together with generator,furthermore UPS output is pure and steady. Humanized bypass output Strong charge ability When UPS connect to mains, there is a 5-10A initial charging current to battery. Automatic startup While the mains is OK,UPS change to battery invert and discharge to battery lower voltage, when the main is on, UPS can automatically startup to mains invert condition without manual startup. Sine wave putput Whether under the mains invert or battery model,output wave always be low distortion and pure sine wave. It can be protect loading equipments.