The most efficient inverter released by luminous is the zelio 1700VA pure sine wave inverter according to my perspective.The best ever feature of the inverter is the digital display on the top which displays the exact time upto which the battery runs.I bought the inverter 2 months before for household purposes.It can operate appliances like light, fan, tv, refrigerator, computer at the same time.The processor used in it is a 32 bit dsp processor which is responsible for its enhanced performance.The machine also gives protection from overvoltages and shortcircuits.MCB is equipped with the inverter for the protection of the main supply.This inverter is considered as the most intelligent inverter and we are happy with its performance.