When you thing about inverter you should go for luminous inverter . It charges the battery very fast and it is long lasting . It is fully digital and can be used easly .when ever power goes out it is automatic . they provide the best service andI think this is one of the best inverter good power backup, long lasting battery, I am already used it in my computer lab whwn power will cut, the inverter is backup whole my system computers, so this is very good inverter.i will also suggested to