I have the same inverter at my home , and really is efficient as it gives a good backup of 10-12 hours if only tube lights and fans are being used.
It has good looks and also is power efficient. It does not increase our electricity bill by any amount. Customer service of luminous is also good. This type of inverter is also available for multi battery functionalities.
Me and my family are so relived by this inverter as it helps us to use appliances for longer time than usual inverters