Really bad inverter. Review on Luminous Eco Watt 850 Square Wave Inverter

As I stay in an village in which electricity cutoff frequently. This make us difficult to carry any activity in night. So I decided to buy this inverter. It is worth Rs 6, 500 and had six months warranty. It doesn't work properly from the day one. Also there are many problems with this inverter. The efficiency of the inverter is less and if charged for a whole day it works only for three hours. Also when it is charging or when it is switch on it makes disturbing noise. Also the inverter need too much space. The handling of the inverter is difficult. There is some problem with the charging. It used to stop charging suddenly and I have to check it everytime. As there are no service Centre for this inverter in Mumbai the warranty is of no use. Also the repairing cost from other sources is too high. I suggest not to buy such costly inverter as it is total waste of money.