Heavy Duty Offline Uninterruptible Power Supply System is used for stabilizing, electronically regenerating all power disturbance, protecting batteries and loads, constantly suppressing filters and others. The Power Supply System can charge the batteries and main power supply as well as at a time it regulates voltage output. The Power Supply System regulates voltage output and works as usual inverter at the time of power cuts. Heavy Duty Offline Uninterruptible Power Supply System is also ideal for component failure, drive and system crashes, corruption of important data, interruption in web access, errors and shutdown of computers etc.