I have a Frontech Energy UPS Inverter at my home but This UPS has many problems like it is not charging properly and the battery backup is very low.I am very disappointed because of this UPS. It is giving only 4-8 minutes backup.This UPS is high in price and low in quality and It is not useful at all. The power cable of this UPS is too short so you have to place it nearby socket.I would never like to recommend you this UPS.