Had used a 1.5 hp aircond for almost 11 years and changed to a panasonic 1.5 hp inverter since mid August this year as electricity consumption of the earlier aircond unit was 12 kwh nightly from 10 pm to 7am at 23C. No longer efficient in power usage.
I have been tracking the new inverter aircond usage and on average it is around 6 kwh nightly for the same duration at 24C.
I am satisfied there is good savings in electricity consumption.

I have not set at 23C since it is already cooling at 24C. Would it be very much higher consumption at 23C ?

This post has been edited by hyalbert: Oct 10 2013, 05:08 PM

Thanks. So, why consume more power at a lower temperature when I am comfortable with cooling at the current temperature level.

As a layman consumer, it is not practically possible to carry out the power utilsation comparison exercise on "actual saving with accurate data". My comparison is on best effort basis.
Considering the increase of of 20% in power used at 23C, it would still be economical compared to the old unit. Admittedly the old unit is no lomger efficient but I recall that it still consumed around 9 kwh nightly during the first couple of years.
All factors considered, notwithstanding the inverter aircond is more expensive, it was a good buy on account of the lower power consumption.