Electricity Saving Tips For Homes And Offices

Refrigerators with Inverter technology can help save electricity

By on July 28, 2015

Hindi Translation: इन्वर्टर प्रौद्योगिकी आधारित रेफ्रिजरेटर बिजली बचाने में मदद कर सकते हैं

Are you planning to buy a refrigerator and looking for energy saving options? If upfront cost for buying is not a concern for you then do look at refrigerators with inverter technology. Rest assured that the extra money you pay upfront will be recovered in the form of electricity savings. Inverter technology that was developed in Japan is the most efficient refrigeration technology available in the market today that can save up to 30-50% electricity consumed (units consumed) compared to regular refrigerators available.

Refrigerator Inverter

How does a refrigerator work?

Whenever it is hot and we want to feel cooler, if we take a bath, we suddenly start feeling better. The moisture (or water) on our body evaporates by taking heat from our body and makes us feel cooler. Similarly in a refrigerator there is a refrigerant called HFC (Hydro Floro Carbon) that moves in the pipes or coils on the rear part of the refrigerator. When it is in a liquid form, it takes the heat from the refrigerator contents and evaporates to form gas there by cooling the things kept in the refrigerator. The gas is then compressed using a compressor to convert it into liquid again, and the cycle continues. The compressor uses electricity to do its job and is the most electricity consuming part of a refrigerator.

Refrigerator also has a device called “Thermocouple” which senses the temperature inside the refrigerator and makes the compressor go “on” or “off”. The thermocouple works as per the temperature set in the refrigerator (yes you can set temperature in a refrigerator as well and we will explain it more in our other articles on refrigerators).

How does a compressor in regular refrigerator work?

Most compressors in regular refrigerators are single speed refrigerators. They are either “on” or “off” based on the temperature in the refrigerator and the setting in the thermocouple. Most compressors are designed to handle peak load conditions (for high temperatures in summers), which means that they run at peak load even in winters when the cooling requirement is less. Every time the refrigerator door is opened, heat enters the refrigerator and the compressor has to take care of this load as well. So most regular compressors are built to take care of peak load plus the “door open shut” load which during most of the year is much more than the actual requirement.

How does a compressor with inverter technology work?

A compressor with inverter technology works very much like a car accelerator. When the speed required is more, the acceleration is more, and when it is less, and then the acceleration is less. This makes sure that during summer months when cooling load is more, the compressor works at peak capacity taking more electricity. But during winter months when cooling load is less, the compressor works less there by consuming less electricity. Even in summer month, the night temperature is less than the day temperature and thus electricity savings happen in night when compressor can run at a lesser speed.

This kind of compressor never switches off even when the temperature stabilizes, but runs at a slower speed maintaining the temperature inside the refrigerator. The benefits are:

  • In an “on” “off” cycle of a regular refrigerator, inside temperature varies throughout. But in case of inverter technology, temperature is more stable.
  • The amount of noise made by the refrigerator is much less in refrigerators with inverter technology as compared to the regular ones.
  • Energy or electricity consumption is much less when the temperature stabilizes.


Although prices of inverter technology refrigerators are on a higher side, but they can save a good amount of electricity, there by helping you recover the money in your electricity bills.Infographic18

Lesser known benefits of Inverter Technology

  • Regular motors need 3-4 times more current (more than running current) at startup. So the inverter/generator size needed to run any AC or Refrigerator increases significantly. But Inverter Technology air conditioners and refrigerators have variable speed motors that start up gradually needing much lesser current at startup. Thus the size of inverter/generator required to startup is less. For e.g. A 1.5 ton fixed speed AC that runs at about 10 Amp current may need up to 30 Amp current at startup and thus a 5 kVA inverter/generator. But an inverter technology Air Conditioner needs about 6-7 Amp current and not much more at startup and thus a 1.5 kVA or 2 kVA inverter/generator is good enough to support it.
  • Regular motors have much lower power factor. In commercial and industrial connections there is penalty for low power factor and rebates for higher power factor. An inverter technology motor will have power factor close to unity (or 1) which not only results in lesser electricity consumption but also help get rebates on better power factor.
  • If you are planning to use Solar PV for air conditioner, then it is the best to use inverter technology air conditioner or refrigerator as it not only reduces the size of PV panels because it consumes lesser electricity, it also reduces the size of inverter to be put along with the PV panel.

Here is a short video for tips to buy the best refrigerator in India

A short video to save electricity in refrigerators:

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198 Comments on "Refrigerators with Inverter technology can help save electricity"

If you have any question or comment, please leave a message here. We try to reply to questions in the sequence they come in. We work from Monday-Friday 10AM-7PM. If we know the answer we try to reply to the question within 3 days.

July 23, 2015

can you please advise annual electricity consumption and and bee star rating for godrej sise by side refrigerator model rs eon 603 sm. thanks in advance for your support

July 25, 2015

Thanks for your very prompt reply but the requested model is not available in your given list. Can you please help me to find out tentative consumption for Godrej Side by side refrigerator model# RS EON 603 SM

July 20, 2015

Is there any inverter technology refrigerator with Automatic Ice Maker? I have not found any yet. I am looking forward to replace an old Whirpool refrigerator with Automatic Ice Maker (dual door, top freezer).

July 17, 2015

HI BB team,
i want to purchase a refrigerator of size in between 300-350 liter with maximum energy efficiency
please suggest me some good refrigerators along with their power consumption.

Kamini Tiwari
June 29, 2015

We have booked a hitachi double door refrigerator today. i have been reading some bad reviews on hitachi refrigerators….their bad after sales service and product not working within months of purchase.

I’m worried coz we have already made the payment….but the delivery is due by 30th June 2015.

Could u plz tell me how reliable this company’s refrigerators are? Do they breakdown within months and is there really a problem in getting prompt service?

Kamini tiwari
June 30, 2015

Thank you so much.

June 8, 2015

Are inverter based washing machines available in market?please mention the brands.

Which are the brands providing inverter based A.C.s in the market currently?
please suggest one which is most energy effecient for domestic use.

Shahid Afridi
June 5, 2015

I want to buy a fridge with inverter single door.I have a luminous battery 165 Ah and microtech ups 1100.
Suggest me some brands.

June 4, 2015

I m planning to buy inverter technology refrigerator. Will u plz tell me which company gives real inverter technology in refrigerator

June 2, 2015

I am planning to buy refrigerator samsung RT50H5809SL or LG GL-M542GDWL. By looking at features, LG GL-M542GDWL seems to be Good. Can you suggest Which is better option.

[email protected]
May 30, 2015


I would like to buy a refrigaretor of 190 Ltr (Earlier it was available 165 Ltr but now it is not available).
What is direct cool and forst free.
My target is for minimum unit consumption so less enegry bill and thus I will be a part of your mission of billbachao.
I have visited your site throughly and found Videocon VZ 207 which is direct cool and it is 190 ltr and it’s unit consumption is 135 unit / year as mentioned at your site. Another one is LG GL-D292JPZZ which is frost free and it is 258 ltr and it’s unit consumption is 190 unit / year as mentioned at your site.
For which pattern I should go for direct cool or forest free.

Now problem is that I may not be able to buy Videocon model as steted above because Videocon deler is not there in our town named Mehsana, which is situated in north gujarat.

Further the purpose of this refrigaretor is as below.
My mother stays at this town and she is alone. She some times comes with us at city Ahmedabad to stay with us. But as we are staying in flat / appatment system she is not feeling comfortable there. Thus she stay for 15 days with us and go back and again stay at our town for two months and again come with us at city and so no cycle is going on. She is 75 plus age with sound health of her age group and she can manage to stay alone at our town.
At present we have Voltas refregarator at Mehsana which is too old and but working. We want to dispose it off and would like to buy new one for my mother.

This is the situation for buying refrigaretor. So please advise direct cool or frost free, 190 ltr or 258 ltr.
After studying purpose and use of refrigaretor If you perticularly suggest pattern forst free or direct cool with brand and model number then I will be the happiest person. In inverter technology is available in these small segment ?

Thanking you in anticipation.

Sincerly Yours

Paresh Jani

Mahua Dasgupta
May 27, 2015

We are comparing between a Samsung 320l and a Haier 320l. Both use DC inverter technology. Samsung is top mounted and Haiee is bottom mounted. Does a top mounted refg save more energy? If so, why?

Mahua Dasgupta
June 1, 2015

Thank you team..I understand that the top mounted fridges technically have more energy eddiciency. However, In the first line of your reply you mention that bottom mounted can also be more efficient. In what way?

Mahua Dasgupta
June 2, 2015

Thank you team. More specifically, with your qualified help, here are the models I have been able to narrow down to – Haier BMR 320l 4* 265 units per yr usage and Samsung 321l 4* 261 units per yr. The differences are Haier is bottom mounted and has “full DC inverter compressor” while Samsung is top mounted and uses “Digital Inverter” technology. Can you help me understand the diff between DC inverter compressor and digital inverter technology? Also suggest pros and con’s (apart from regular pros of a BMR).

Mahua Dasgupta
June 3, 2015

Thank you team, your response helps me. But you had mentioned earlier that in long term top mounted ref are marginally more efficient than same.volume BMR. So we thought Samsung would be more efficient. Also which fridge is better in longer term considering we do not plan to change the fridge in future.