My father was purchased v guard inverter one year ago. I was working fine. But day by day its battery backup was decreasing. When we visit the electric store from where we was purchased it. They said they can do nothing about it. Call v guard customers care. I call them and tell about problem we was facing. They said we will send our technician and he will solve your problem but no one come to see. I call v guard customers service many times but they didn’t answer my calls. This inverter is fully waste of time and money. Don’t buy it.