Hello frnds, luminous inverter are so cool inverter .there are many feature in luminous inverter .luminous are greate company in india for battery and inverter.it battery life are so long. I have also luminous battery and inverter .it is realy so good. battery expandable for full day after one time full charging.there autocut is also a feature that when the paower cut, it aotomatic on the ups .there are no ruff sound in the inverter and ups.it is silent.i advise to all that when u purchase inverter and battery than purchase only luminous company inverter and battery.there are 1 year warreny also on both thinges(battery and inverter).