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What is an Inverter AC?

Edited by Piyush

If you are looking to buy an air conditioner in your house, you must be doing some research before zeroing upon which one you should buy.

While doing your research, you must have come across a new term – Inverter AC. So, let's understand what Inverter AC is?

Inverter AC is the latest AC technology in the market. Thanks to the electronic evolution, the AC industry has undergone a tremendous shift.

Inverter ACs are the current trend in the market. Inverter AC is designed, keeping in mind the electricity consumption part. You will be amazed to know that it can save approximately 30-50% of your electricity bill than regular AC.

Inverter AC

To know which AC is the best since 2016, BEE has started to give ratings to AC, but earlier, they used to provide a different rating to the inverter and non-inverter AC. But in 2018, this pattern was revised. Now, BEE gives a merged rating to both inverter and non-inverter AC.

How does the Inverter AC work?

Before we understand inverter AC, we must understand what inverter is. An inverter is a device which, in the simplest term, is used to control frequency. An inverter is used in almost every household and it controls the voltage, temperature, and current.

Inverter technology in AC works on the electromotor compressors. The inverter is used to regulate the compressor motor's speed, which in turn controls the temperature. The DC inverter unit consists of a variable frequency drive, which further contains an adjustable electric inverter.

This adjustable electric inverter controls the electrometer's speed, which is the compressor and the heating or cooling device. The drive is responsible for converting the incoming AC into DC and then using a modulation technique, electric inverter produces a current of a desired frequency.

Thus, when you use a non-inverter AC, the temperature keeps on fluctuating whereas it is not the case with inverter AC. In inverter AC, the temperature remains constant, and thus the cooling also remains constant. The microcontroller is responsible for air temperature in both the cases and gets it adjusted according to the compressor's speed.

Inverter air conditioning techniques are highly recommended these days. They are considered to be quite efficient when compared to non-inverter air conditioners. Since the voltage fluctuations are eliminated; thus, spare parts of the air conditioner last quite long, and the shelf life also increases.

Other than that, the customer satisfaction is high because cooling is the same throughout the night. Temperature does not change, and thus the cooling remains constant. As a result, inverter AC is quite silent. They create much less noise when compared to the non-inverter AC.

They also operate on a lower operating cost, and they have a much lesser breakdown than non-inverter AC. But while buying, you might observe that inverter ACs are bit costlier than non-inverter ACs, but with a reduction in the electricity bill, this cost is justified.

Benefits of Inverter Air conditionerff

The inverter air conditioner comes with several benefits and a higher price tag. So, if you want to go ahead with inverter air conditioners then read the following major benefits of the same -

  • Strong and powerful – Inverter air conditioners are known to operate in their full capacity right from the time it is switched on. This results in achieving the set temperature much more quickly as compared to the non-inverter air conditioners. For instance, in a closed study, we have observed that a non-inverter AC takes 15 minutes to reach 22 degrees, whereas non-inverter AC takes 9 minutes.
  • Reduction in electricity consumption – Once the desired indoor temperature has been achieved, inverter AC is known to lower its capacity to regulate the same temperature. As a result, inverter AC is much more energy-efficient when compared to non-inverter AC. In contrast, non-inverter AC starts or stops the compressor many times to maintain the required temperature.
  • Comfortable – Inverter air conditioners are highly comfortable when compared to non-inverter air conditioners. Inverter air conditioners are known to adjust to the capacity as per the air conditioning load and the difference in the desired temperature and the current temperature of the room. This makes it score full points when it comes to the comfort level.
  • No noise – Inverter AC is quite silent because they operate at a very low speed. Even if you go for split inverter AC then also other than the compressor sound, you won’t hear any other noise from the AC. It’s silent operation is one of the biggest pros.
  • Sound sleep – Since the same temperature is maintained throughout the night; thus, your sleep is not at all disturbed. Normally, the sleep gets disturbed on a hot and humid day when the AC temperature fluctuates. But thanks to inverter AC this never happens and thus, you can enjoy a break free and peaceful sleep with an inverter AC.

How does an Inverter AC reduces electricity bills?

Since it’s a very important debate when it comes to electricity bills and AC, thus we have decided to dig deeper here. Since, the voltage fluctuations are eliminated in such ACs, thus the cooling requirement is lower and the device also pumps less gas.

As a result, less quantity of heat is then distributed to the condenser. As a result, your condenser is much cooler, and thus there is much less pressure on the condenser. Also, the compressor draws much less current, and thus the compressor is much more efficient.

Some other important observations

  • Inverter AC works best when you go for a large tonnage requirement.
  • Undersized inverter AC will never save your electricity bills, whereas oversized inverter AC is a big saving.
  • You must keep using the inverter Ac for a longer period rather than switching it on and off. Repeatedly turning changing the power mode will not reduce the electricity bill.

Are Inverter ACs slow in operation?

Some people also are of the view that inverter AC cools quite slowly. But this is not true. Let us explain to you how. Non-inverter AC is fixed speed AC, whereas inverter AC has variable speed. Non-inverter AC has a compressor that can be “ON” and “OFF” both whereas inverter AC has their compressor at “ON” mode only.

Non-inverter AC is specifically designed to cool during the peak summer times, and thus they are oversized all the time. The overcooling is the biggest drawback of this AC.

For example, if you have kept your AC temperature at 25, then it will further lower down your room temperature to 22 or 23. But then you may ask what is the use of thermostat then?

Well, the thermostat is known to switch the compressor when the outside temperature has reached 25. But before that, the compressor does the job of converting from liquid to gas and then again from gas to liquid, and then the compressor compresses it.

But in this case, the refrigerant is much more, and the liquid in the room is quite less. Thus, there is not enough heat in the room to convert the liquid into a gas, and it keeps moving as the liquid. Now, the thermostat comes in the picture.

It detects the temperature and switches off the compressor, whereas the refrigerant is still in the liquid state. It absorbs the heat in the room and convert it into gas; bringing the room below the set temperature. Hence, inverter AC cools at an optimum level whereas non-inverter AC cools more than the temperature set.

Other related articles: Top 15 Best Inverter AC in India, Top 12 Best Inverter for Home in India

Let's explore the list and have a look at the features along with the pros and cons of the Top 6 Best Inverter AC in India.

Top 6 Best Inverter AC in India (2022)

 1. LG KS – Q18YNZA - 1.5 ton Split Inverter AC

LG KS – Q18YNZA - 1.5 ton Split Inverter AC


  • Cooling capacity: 5100 watts
  • Capacity : 1.5 Ton
  • Refrigerant : R32
  • ISEER : 4.73 W/W
  • Power consumption : 1440 W
  • Compressor : Dual Rotary
  • Condenser Coil : Copper
  • Battery Type : 2AAA batteries

This split AC has a cooling capacity of 5100 watts, which is equivalent to 1.46 tons. This AC has received BEE 5 star rating and ISEER 4.73.

The power consumption of this AC is also quite nominal, which is just 1400 watt.

It comes with 100% copper heat exchange and also has ocean black corrosion protection, which increases the durability.

The dual rotary compressor in this allows much faster cooling and quite less electricity consumption. 

It can cool quite well in peak summers because it is equipped with a low derating factor.  With active energy control, you can sense the cooling requirement and thus can adjust the temperature accordingly.


  • Consumes very less energy
  • Cooling is quite effective 
  • Design is sleek and trendy 
  • The filter is quite convenient to clean
  • No noise in the indoor unit


  • Slow cooling under energy control option
  • Remote is not that well responsive 
  • For every single change, AC makes sound
  • An outdoor unit is quite bigger

 2. Midea Santis Pro 3i – 1.5 Ton Split Inverter AC 

Midea Santis Pro 3i – 1.5 Ton Split Inverter AC


  • Cooling capacity: 5050 W
  • Capacity : 1.5 Ton
  • Refrigerant : R32
  • Power consumption : 1490 W 
  • Compressor : Rotary
  • Condenser Coil : Copper
  • Battery Type : 2AAA Batteries

This split AC has received BEE 3 star rating with a cooling capacity of 5400 watts. The power consumption of this AC is 1990 watt with an ISEER rating of 3.75.

In case your usage is not too heavy, then this split AC is quite good because the ISEER rating is quite good.

This has got 100% copper condenser, and this is a very good split AC under the budget category.

This split AC comes with an auto cleaning feature and a refrigerant leakage detector.


  • No noise at all
  • Superfast cooling
  • R32 is highly energy-efficient and thus the power consumption is low
  • Elegant look


  • Swing deflector has a downward boundary constraint 
  • AC remote is quite slow in response
  • The remote display has got no light
  • The indoor unit has exposed wires and no plugs

 3. Toshiba RAS-18PKCV2G-IN+RAS-18PACV2G-IN – 1.5 Ton Inverter AC 

Toshiba RAS-18PKCV2G-IN+RAS-18PACV2G-IN – 1.5 Ton Inverter AC


  • Cooling capacity: 5 Kilowatts
  • Capacity : 1.5 Ton
  • Condenser Coil : Copper
  • Suitable room size: 130 Square Feet
  • Noise level: 35 Db
  • Warranty: 1 Year (1 year on product, 1 year on condenser, 5 years on the compressor)

1.5 Ton Inverter AC – This AC has a cooling capacity of 5100 watts and power consumption of 1230 watts.

With an ISEER rating of 5.6, this is best if you are looking for an electricity-saving part. This AC has quite interesting features like – 100% cooper, dustless coils.

It also has a self-cleaning feature and R32 refrigerant. In case your AC usage is high, then you must go for this.


  • Silent AC 
  • Cools room super cool 
  • Product quality is superb 
  • Size of the indoor unit is quite small 
  • Air throw capacity is quite good


  • No copper pipes, wires, and brackets are given in the box of this split AC 
  • No display in the AC 

 4. LG KS-Q12 ENZA – 1 Ton Split Inverter AC 

LG KS-Q12 ENZA – 1 Ton Split Inverter AC


  • Cooling capacity: 3470 W
  • Capacity : 1 Ton
  • Refrigerant : R32
  • Power consumption : 938 W
  • Compressor : Dual Rotary
  • Condenser Coil : Copper
  • Battery Type : 2AAA batteries

This AC has a cooling capacity of 3470 watts, which is equivalent to 1 ton. This AC has got a BEE star rating of 5 with an ISEER rating of 4.70 and power consumption of 938 watts.

This comes with a 100% cooper heat exchange, which also has ocean black corrosion protection, and this makes the AC quite durable.

This AC has got a dual compressor, which is both energy efficient and cools much faster.

This ac comes with active energy control, which allows you to adjust the cooling and thus save the electricity bill.


  • Energy Saving
  • Elegant Look
  • Noise less
  • Small Outdoor Unit
  • Power control options are quite good


  • Cooling Speed is not fast
  • Horizontal swing missing
  • No LED light in the remote

 5. Godrej GIC 12 BAH 8 GGQG – 1 Ton Inverter AC 

Godrej GIC 12 BAH 8 GGQG – 1 Ton Inverter AC


  • Cooling capacity: 3550 W
  • Capacity : 1 Ton
  • Refrigerant : R290
  • ISEER : 5.8
  • Power consumption : 795 W
  • Compressor : Rotary
  • Condenser Coil : Aluminium

This AC model has an ISEER rating of 6.15, which is highest in the entire Indian AC market. This one has a cooling capacity of 3550 watts and power consumption of 795 watts.

With this AC, you would get an annual electricity bill of 453 units, which is equivalent to a cooler. This inverter AC is equipped with an aluminum condenser along with solid corrosion protection. This AC is equipped with BLDC motors for IDU, ODU, and compressor, which makes it highly energy efficient.

It has a stage 2 air filters that controls any kind of virus, dust, or insecticides to enter the AC. This AC also comes with a 10-year compressor and 5-year condenser warranty.


  • Comes with warranty protection
  • Elegant look
  • Good power consumption capacity


  • Cooling not up to the mark
  • Noise level is too high
  • Takes time to reduce the moisture content of the room
  • Remote is quite bulky
  • No temperature sensor in the remote

 6. LG JS Q18 WUZA – Window Inverter AC 

LG JS Q18 WUZA – Window Inverter AC


  • Cooling capacity: 5000 W
  • Heating capacity: 5680 W
  • Capacity : 1.5 Ton
  • Refrigerant : R32
  • ISEER : 4.73 W/W
  • Power consumption : 5000 W
  • Compressor : Dual Rotary
  • Battery Type : 2AAA batteries

There are very few window inverter ACs available in the market. This is the very first window Ac with compressor technology in the market. This one comes with dual compressor technology, which is not only super quick in cooling, but this is quite silent in operation too.

This one comes with 100% copper coating with black ocean protection, which protects the AC from corrosion. Can you believe that this Ac is wi-fi enabled, and thus you can use it with your smartphone as well?

The cooling capacity of this Ac is 5000 watt, and the ISEER rating is 3.5. This is one of the best window inverter ACs in the market at present.


  • Comes with both heating and cooling features
  • Cute and elegant design
  • Superb airflow
  • Highly energy efficient


  • No auto swing function
  • No LED light in the remote
  • Noise level is quite high
  • Auto fan speed control is absent

Here is the list of the Top 6 Best Inverter AC in India:


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About the Author

Piyush Kashyap is a Ph.D student at Sant Longowal Institute of Engineering and Technology, Sangrur. He is a budding editor/ writer and has been working as a part-time reviewer for online content. He loves to read tech-based articles and has a knack for reviewing such articles He likes to stay updated about the latest trends in technology. He has also been working as a reviewer for many scientific journals. He also writes articles based on science. Know More About Piyush

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