New Delhi, July 2 -- Summers in Delhi NCR have been brutal this year. The soaring temperatures have also lead to a stark rise in our electricity bills. A part of the reason for the higher bills goes to the ACs, the other major part goes to refrigerators that work quietly and continuously to keep food from going bad.

For years, I assumed that most refrigerator, barring their capacity, consume the same amount of electricity until my monthly electricity bills kept climbing in the past two months. That's when I decided to replace my conventional refrigerator with an inverter refrigerator for 30 days to see if the newer inverter compressor models delivery the energy saving that they claim or not.

The difference, at first, wasn't dramatic. My...