Without any type of voltage fluctuations is works. Though the main voltage goes up and down. Easily it carries load of 5 normal rooms having one cfl and one fan each. It gives backup upto 5 hrs minimum without any fail. The best thing is that we can easily rely on this product.
There is no risk of short circuit for the installment of this product. It is having the best size to fit at any corner of a room. It is much userfriendly No sound. It donot damages any high voltage appliances like AC or refrigerator. I would like to strongly recommend luminous ion 1500 va sin wave inverter to all.