Uninterrupted Power Supply System is portable type in nature and can be moved it to the garden or terrace when in need of a back-up power source. The System has audible alarm for low battery, over load and short circuit and has various protections such as over load, over charge, short circuit, thermal shutdown, battery reverse polarity and battery deep discharge. The System has a dimension of 521 X 341 X 670 mm, weight from 16.98 to 19.10 kg. The System has zet black and white coloured receptacle. The System has castor wheels and has a cradle rocker system, by which the main unit can be rocked to the front to reveal the battery inside. The System ensures back up at times of blackouts, brownouts, sags, and surges. The Uninterrupted Power Supply System has operating temperature from -25 ° C to +55 ° C and has LED indication for mains, charging, ups on, low battery and over load.