The APN 1kVA adopts the double conversion online architecture ideal for resolving all issues on power supply. This state-of-the-art solution is especially designed for elimination the power loss, extra high or low voltage of utility power,voltage sages or damped oscillation, high-voltage pulse,voltage fluctuation,surge voltage,harmonic distortion,clutter immunity,and frequency fluctuation etc.,delivery safety and reliable power supply to guarantee for users load.