Hello friends, I am using this Luminous 1500VA invertor since 3years and it is still working perfectly.It havent gave any problem till now.I bought it at a price of 6000rs and got 3years warranty also.Trust me friends this invertor is too good.The battery which I am using is also of luminous, and the invertor charges it very rapidly because when the power cut takes place for long.It easily gives the backup of 10-15 hours with moderate usage which is more than enough.Overall this invertor is very durable and have a longlife.It is very ease to use.I will recommend luminous to all.Must buy