Since 2012 this sukam 650v invertor is in use at my home.The backup is just amazing as I come from a place in UP where powercuts sometimes reach upto10 hours a day.
This sukam product can countinously run Three ceiling fans, Two tubelights at same time for 6-7 hours sometimes even more.
It also runs my LED tv without any voltage glicthes.
I would definetly recommend to everyone with a good battery.