Line Interactive Uninterruptible Power Supply System continuously monitors mains, voltage and provides regulated output voltage that is free from spikes and surges. The Uninterruptible Power Supply System instantly switches on and provides regulated RMS voltage from battery on mains failure. The System is provided with continuous buzzer that indicates urgent need to shutdown the UPS in case of low battery or overload. Line Interactive Uninterruptible Power Supply System can be availed with RS232 port on specific requirement.