Single Phase Online UPS system is extensively used in medical laboratories, clinic and in IT centers due to its high IGBT technology to provide safe, reliable power to the critical load even with severe disturbances on the incoming supply. This Single Phase Online UPS system is features with to allow convenient monitoring and accessing of statues. It is equipped with fault indicators and battery level indicating LCD display and perfect single phase to single phase online. Further, Single Phase Online UPS system is latest digital high frequency IGBT PWM technology to provide safe, dependable power to the critical load even with severe disturbance on the incoming supply.