Anyone can testify that energy saving technology really saves electrical bill? If so, how substantial is the saving?

Side question: What the hell is inverter technology??? Seem to be seeing it everywhere!

Inverter incorporates feedbacks from your environment so that your machine does not work at a constant speed all the time!

It helps when the kW/h usage is high, eg air cond, it slows down the speed of the motor when the room temperature cools down sufficiently till the target temperature, and ramps its up again when it dips down abit, instead of all the time working hard.

For factories we use them in larger motors for cost efficiency, so yes, it helps. But you have to use them enough to see the difference.

Just compare the kW/h specs you can make a comparison.

Energy saving technology today actually saves on the electrical consumption. The real question is how long will the return of investment be.

As far as inverter technology is concerned, if for industrial usage, definitely there will be savings but this will need further fine tuning before maximum savings can be achieved, switch running, peak loadings and so on. A bit technical there, sorry.

For inverter technology in terms of domestic air conds, its a whole different ball game. The general idea of inverters is to maximise the output during the peak requirements and keep output as low as possible during low peak requirements. Energy will be conserved during the low peak periods if the equipment can detect the low load and therefore "run lesser" or at minimal requirements. By achieving this, energy will be saved and thus equal to $avings.
However, this may not likely be the case for domestic air conds as mentioned above as most people would set the temperature between 18 - 24C, which leaves no way for the compressor to achieve this and cut off, unless the air cond is oversized for the usage or the room is very very small. Anyway, this is a whole new topic and there's a lot of factors at play which we better not go into lol.

End line...if you want immediate savings...change your lightings to LED ones, even better, power them up with solar energy. One time investment = ultimate savings

i know some aircnd( inverter ) it only works after u swtch it on more than 8 hours... most probably great for fridge...