inverter ac benefits

Are you looking for Inverter Ac Benefits? Read through for problems with inverter ac. The article contains how to use inverter ac to save electricity. You will also find inverter vs non inverter ac power consumption in the post.

The inverter technology is the latest advancement concerning the electromotor of compressors. An inverter is used to regulate the speed of the compressor motor in order to adjust the temperature. The main feature of an inverter AC is its ability to control its compressor motor speed. The regulated speed allows the unit to maintain the temperature without having to power down its motor. This means an inverter air conditioning unit is way more energy-efficient than non-inverter ones.

inverter vs non inverter ac power consumption

What Are The Major Advantages Of Inverter Air Conditioners?

Inverter Ac Benefits

  • Consumes less power in comparison to a traditional AC.
  • No voltage fluctuation.
  • Keeps constant room temperature.
  • Effective cooling.
  • Suitable for small and large spaces.
  • Safe for residential wiring due to lower power consumption.
  • Environment-friendly.

The inverter air conditioning offers variable compressor speed. The sensor embedded in the inverter regulates the power in accordance with the room temperature, thus resulting in less electricity consumption and higher energy-efficiency. When compared to non-inverter ACs, inverter air conditioners have fluctuation detection capabilities and automatic adjustments made to the overall compressor speed. This advanced mechanism helps save energy, proving beneficial to the surroundings.

Major Benefits –

  • Cost-effective

Owing to the operational method of inverter air conditioner, its compressor does not work at full capabilities, hence saving you from paying a huge amount of money at the cost of electricity units. Thus it is much more efficient than a non-inverter AC as it helps you save a lot on electric bills.

  • Energy-efficient

The inverter technology is regarded as the best solution when it comes to economic and energy-saving operation. In an inverter model, the heating and cooling are automated in a seamless and power-saving manner whereas former technologies used to the consumer a lot of electricity regardless of the usage.

  • Better Cooling

A non-inverter AC cannot adjust the level of cooling, so it cannot cool the area faster when required. On the other hand, inverter AC can run the compressor at a higher speed to cool the entire area fast when required.

  • Silent Operation

The inverter AC runs at a very slow speed, thus it is much more silent. In split inverter ACs, apart from the low compressor noise, there is comparatively less noise inside the room as well.

  • Sound Sleep

AC enables you to have a sound sleep as it maintains the temperature of the room steady at the temperature you set on the thermostat of the AC.

Air conditioners maintain set temperature by cooling when room temperature rises above the set temperature and heating when the room temperature falls below the set temperature.

Motor speed in non-inverter type air conditioners remains constant and temperature is adjusted by turning the motor ON and OFF, which consumes more energy.

In inverter type air conditioners, temperature is adjusted by changing motor speed without turning the motor ON and OFF.

Compared to non-inverter type air conditioners, air conditioners with inverters have less power loss and can save in energy.


When compared with a man running

Non-Inverter Type Air Conditioner

Starting and stopping hard running, resting, then starting and stopping once again uses more energy.

Inverter Type Air Conditioner

When an appropriate pace is maintained, a runner can continue without wasting energy.

how to use inverter ac to save electricity

Motor operates by magnets and electric current.

The motor consist of two types of magnets.

One is a permanent magnet that has a natural magnetic force.
The other is an electromagnet that produces a magnetic force by electricity.

The direction of electric current determines polarity of the electromagnet

The north (N) and south (S) poles of the electromagnet are determined by the direction of electric current.

When the direction of electric current is reversed, the north (N) and south (S) poles are also reversed.

The motor rotates by switching direction of electric current.

When magnets come into contact, an attractive force occurs between the N and S poles of the magnets and a repulsive force occurs between the N and N poles and the S and S poles.

The motor rotates from the attractive and repulsive forces caused by the change in polarity of the electromagnet.

The inverter is used to adjust the speed in which the direction of the electric current is switched, and this regulates the rotation speed of the motor.

The inverter rotates the motor by switching the direction of the electric current of the electromagnet.

Moreover, regulation of rotation speed in a motor is also performed by meticulously controlling the switching speed.

What is Inverter AC and How it is Different from Non Inverter AC?

If you are thinking of buying an air conditioner, the latest and the most efficient technology that is available in market today is the Inverter Technology for AC. Inverter technology is designed in such a way that it can save 30-50% of electricity (units consumed) over a regular air conditioner. And since 2016, BEE has started give star ratings to inverter technology AC as well. And in 2018 BEE has merged the star rating levels of inverter and non inverter ACs. However, let’s look at what is inverter technology and how is it different from a non inverter ACs. And also look at Best Inverter AC in India in 2021 and Window Inverter AC.

How does an air conditioner work?

For most people, air conditioner just throws cool air at the temperature one sets it at. But does it really work that way? In fact air conditioner during cooling process, takes the indoor air, cools it by passing it through evaporator and throws it back in the room. It is quite opposite to how our good old air coolers used to work. Air coolers used to take outside air, cool it with water and throw it in. But air conditioners just work on internal air. Along with evaporator air conditioner also has a compressor that compresses the gas (refrigerant) in the AC to cool it that in turn cools the incoming internal air from the room.

In a regular air conditioner:

The compressor is either off or on. When it is on, it works at full capacity and consumes full electricity it is designed to consume. When the thermostat reaches the temperature level set in the AC, the compressor stops and the fan (in AC) continues to operate. When the thermostat senses that the temperature has increased, the compressor starts again

What is Inverter Air Conditioner?

The inverter technology works like an accelerator in a car. When compressor needs more power, it gives it more power. When it needs less power, it gives less power. With this technology, the compressor is always on, but draws less power or more power depending on the temperature of the incoming air and the level set in the thermostat. The speed and power of the compressor is adjusted appropriately. This technology was developed in Japan and is being used there successfully for air conditioners and refrigerators. This technology is currently available only in split air conditioners.

What is benefit of Inverter Technology?

Every air conditioner is designed for a maximum peak load. So a 1.5 ton AC is designed for a certain size of room and 1 ton for a different size. But not all rooms are of same size. A regular air conditioner of 1.5ton capacity will always run at peak power requirement when the compressor is running. An air conditioner with inverter technology will run continuously but will draw only that much power that is required to keep the temperature stable at the level desired. So it kind of automatically adjusts its capacity based on the requirement of the room it is cooling. Thus drawing much less power and consuming lesser units of electricity.

Although air conditioner with Inverter Technology adjusts its capacity based on the room requirement, it is very important to install a right sized air conditioner in a room. Please make sure that you evaluate the room and air conditioner capacity before you make a purchase.

In case you are not convinced about the benefits of inverter technology, you can read more over here: Why and How Does Inverter Technology Save Electricity?

What’s the difference between Inverter Technology AC and BEE 5 star non inverter AC

  1. Inverter technology air conditioners are variable speed/ variable tonnage air conditioners and thus operationally they are quite different from regular air conditioners that have single speed compressors and single tonnage.
  2. Inverter technology air conditioners adjust their speed/tonnage depending on heat load of a room. Whereas regular air conditioners do not.
  3. Every room has a different heat load, even if they are of the same size. The heat load depends on various factors as we have listed on our article: Things that impact electricity consumption in air conditioners. To give you an analogy, every human being is different; even then the waist sizes of most trousers available in the market are fixed (leaving the ones with elastic). Inverter Technology AC is just like a trouser with an elastic waist that can adjust to the size. The other benefit is that even if the waist size increases or decreases, the trouser with elastic will adjust accordingly. Regular Air Conditioners are fixed size.
  4. Based on the data on power consumption by BEE, Inverter ACs of BEE 3 star ratings are about 7% more energy efficient than BEE 3 star rated non inverter ACs.
  5. The heat load in a room does not remain constant and it varies from seasons, varies based on number of people, varies between day and night, varies based on climate profiles of your location. To take the same analogy we mentioned above, the waist size increases or decreases with the amount of food one eats or the amount of exercise one does. So as a trouser with elastic waist can work well, an air conditioner with inverter tech can work well.

Power Consumption of Inverter and non inverter air conditioners.

Based on data from BEE in 2018 (the levels are similar in 2020), below is the representative (median) sample of power consumption of Air Conditioners of various tonnage and star ratings:

0.75 ton1 ton1.5 ton2 ton
1 Star AC (mostly non Inverter)62784312461648
2 Star AC (mostly non Inverter)59680011841626
3 Star AC (mix of Inverter and non Inverter)54274711041448
4 Star (mostly Inverter)4646459451293
5 Star (mostly Inverter)4505548401113
Annual Electricity Consumption (Units or kWh for 1600 hrs) based on data from BEE

Are Inverter technology air conditioners slow in cooling?

Several people have concerns that Inverter Technology air conditioners do not cool well or cool slowly. However let us take this image as reference to understand how inverter AC works:

Inverter AC

Non inverter ACs are fixed speed ACs, where as inverter ACs are variable speed ACs. Non inverter ACs have compressors that go “On” and “Off”. Whereas inverter ACs have compressors that are “On” all the time. As non inverter ACs are sized for peak summer heat load, they are over-sized all the other times (in fact most of the time people oversize even for peak summer season). The drawback of the same is that the AC “Over cools” most of the time. So if you set AC at temperature of 25, it will cool it down to 23 or 22. Now one would question: then what is the use of thermostat? Well the thermostat (in a non inverter AC) switches off the compressor when the outside temperature has reached 25. But a lot has happened before that. In an AC, refrigerant moves from liquid to gas (by taking heat from the room) and then back from gas to liquid as the compressor compresses it. But if the refrigerant is more and heat in the room is less (which happens in over sized AC), it does not get enough heat from the room to convert from liquid to gas and it keeps moving as liquid. Now when the thermostat detects temperature and switches off the compressor, the refrigerant still remains in liquid state and thus has capacity to take heat from room to convert to gas. And so it takes more heat from the room and cools the room below the set temperature.

In comparison, the inverter tech AC changes the flow rate of refrigerant based on the heat of the room. When heat is less, the flow rate is less, when heat is more, the flow rate is more. And it does not switch off the compressor ever. It just makes sure that if temperature setting is 25, it is maintained at that level.

So the difference is: non inverter AC would over cool as shown in the picture. Whereas inverter AC will cool optimum. And thus one may feel that inverter AC does not cool or is slow.

Is there a Window AC with inverter technology available in market?

In in 2021 LG is the only brand that has window inverter air conditioners. They have 1 Ton,1.5 ton and 2 ton models with BEE star rating of 5 and 3 among window air conditioners. They have ISEER levels similar to BEE 3 star rated split Air Conditioners

Are there Star Ratings for Inverter ACs?

In 2016, BEE introduced a new star rating standard for Inverter Technology ACs as well. In 2018 all inverter AC models are in BEE 3, 4 and 5 Star rating ranges on BEE. To know more about new star rating standards for Inverter ACs, you may read this page on our website: Understand What is ISEER and Star Labeling of Inverter Air Conditioners in India.

Best Inverter AC in India in 2021

Here are some handpicked models:

Best 1.5 ton Split Inverter AC – LG KS-Q18YNZA (5 Star)

The three most important things that people expect from an air conditioner are: 1) It should cool well 2) It should not consume a lot of electricity and 3) It should be durable. Out of these 3, the first depends on the cooling capacity or the tonnage of an air conditioner and if you have calculated the right tonnage as mentioned above and you have derived 1.5 ton as your cooling requirement then this particular AC from LG is a perfect fit if you are looking for the “Best” 1.5-ton Air Conditioner. LG is a great Korean brand which has a large service network in the country. It is also one of the most popular AC brands in the country. This AC has a cooling capacity of 5100 watts which is equal to 1.46 ton. This AC is a BEE 5 star rated air conditioner with ISEER of 4.73 and nominal power consumption of 1440 watts. But as this is an inverter tech air conditioner, it will vary its tonnage as well as power consumption based on the need of the room. It comes with 100% copper heat exchangers with Ocean Black Corrosion Protection which make them quite durable. The dual rotary compressor cools faster than most regular ACs and consumes less electricity. It has a low derating factor which means it cools well even in peak summers. It has active energy control which senses the cooling requirement perfectly and thereby adjusts the cooling and electricity consumption. This results in good electricity savings. So, it is a good AC with high efficiency, durability and cooling and does not cost a lot.
ProsHigh energy efficiency at affordable price.Ocean Black Protection for Durability.Dual Rotary Compressor for faster and efficient cooling.100% Copper.Has Stabilizer free operation.Low derating factorConsSlightly lower cooling capacity as compared to most 1.5 ton ACsDoes not have PM 2.5 or PM 0.1 air filtersDoes not have 3D Air FlowNo latest features like Wifi
Keyspecs
Nominal Cooling Capacity: 5100 WattsNominal Power Consumption: 1440 wattsISEER: 4.73R32100% CopperAnnual Power Consumption: 836 units
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Best budget 1.5 ton Split inverter AC – Midea SANTIS PRO 3i (MAI18SP3N8F0)

If you want an inverter AC for your room to have better comfort or to save electricity, your usage is not very high, and you want a model that is not expensive, then the best model in the market come from a budget brand: Midea. It’s Santis Pro 3i model is a BEE 3 star rated model with nominal cooling capacity of 5400 watts (which is 1.54 tons), the nominal power consumption of 1990 watts and ISEER of 3.75. The ISEER number is pretty good if your usage is moderate (less than 1600 hrs per year). But still, the model is among the cheapest inverter ACs in the market. Midea is a pretty decent Chinese brand that makes ACs with 100% copper condenser. On top of it, Midea has partnered with Carrier in India and so the JV provides support on the products.  This AC has Auto Cleaning feature along with refrigerant leakage detector, Follow Me (sensor to direct airflow to the user) and timer to set on/off timing of the AC. So if you are looking for a value for money buy, then this AC is a great choice.
ProsGood energy efficiency and cooling at a reasonable price.Auto Cleaning functionality.This AC also has refrigerant leakage detector.Comes with a rust guard for outdoor unit.ConsBasic model which lacks high end features like air filtersNo sensors for performance optimization.
Keyspecs
Nominal Cooling Capacity: 5400 WattsNominal Power Consumption: 1990 wattsISEER: 3.75R410A100% CopperAnnual Power Consumption: 1069 units.
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Most Energy Efficient (Electricity Saving) 1.5 ton Inverter AC – Toshiba RAS-18PKCV2G-IN+RAS-18PACV2G-IN

If you are looking for the most efficient 1.5 ton inverter AC then Toshiba RAS-18PKCV2G-IN+RAS-18PACV2G-IN is what you are looking for. Toshiba is a Japanese brand which makes really good and efficient ACs. This AC has a nominal cooling capacity of 5100 watts and nominal power consumption of 1230 watts. The ISEER of this AC is 5.6 which is highest among all 1.5 ton ACs. This AC also boasts of a lot of features like 100% copper, Dustless coils (has technology to keep coils dust and mold free), self-cleaning and uses R32 refrigerant. If your usage of AC is really high, then you must go for it.
ProsSuper high energy efficiency.Dust Free Coils which can be odor and mold freeSleep mode can help improve comfort level at night.ConsDoes not have too many air filters or features.
Keyspecs
Nominal Cooling Capacity: 5100 WattsNominal Power Consumption: 1230 wattsISEER: 5.6R32100% CopperAnnual Power Consumption: 704 units.
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Best 1 ton split Inverter AC – LG KS-Q12YNZA (5 Star)

This 1 ton model from LG again comes out as the best in terms of performance and price. This AC has a cooling capacity of 3470 watts which is almost 1 ton. This AC is a BEE 5 star rated air conditioner with ISEER of 4.70 and nominal power consumption of 938 watts. But as this is an inverter tech air conditioner, it will vary its tonnage as well as power consumption based on the need of the room. It comes with 100% copper heat exchangers with Ocean Black Corrosion Protection which makes it quite durable. The dual rotary compressor cools faster than most regular ACs and consumes less electricity. It has a low derating factor which means it cools well even in peak summers. It has active energy control which senses the cooling requirement perfectly and thereby adjusts the cooling and electricity consumption. This results in good electricity savings. So, it is a good AC with high efficiency, durability and cooling and does not cost a lot.
ProsHigh energy efficiency at affordable price.Ocean Black Protection for DurabilityDual Rotary Compressor for faster and efficient cooling100% Copper.Has Stabilizer free operation.Low derating factorConsDoes not have PM 2.5 or PM 0.1 air filtersDoes not have 3D Air FlowNo latest features like Wifi
Keyspecs
Nominal Cooling Capacity: 3470 WattsNominal Power Consumption: 938 wattsISEER: 4.7R32100% CopperAnnual Power Consumption: 572 units.
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Best budget 1 ton split inverter AC – Midea Santis Pro 3i (MAI12SP3N8F0)

Midea Santis Pro 3i model is a BEE 3 star rated model with nominal cooling capacity of 3500 watts (which is 0.99 tons), the nominal power consumption of 1180 watts and ISEER of 3.75. This model is among the cheapest inverter ACs in the market. Midea is a pretty decent Chinese brand that makes ACs with 100% copper condenser. On top of it, Midea has partnered with Carrier in India and so the JV provides support on the products. This AC has Auto Cleaning feature along with refrigerant leakage detector, Follow Me (sensor to direct airflow to the user) and timer to set on/off timing of the AC. So if you are looking for a value for money buy, then this AC is a great choice.
ProsGood energy efficiency and cooling at a reasonable price.Auto Cleaning functionality.This AC also has refrigerant leakage detector.Comes with a rust guard for outdoor unit.ConsBasic model which lacks high end features like air filtersNo sensors for performance optimization.
Keyspecs
Nominal Cooling Capacity: 3500 WattsNominal Power Consumption: 1180 wattsISEER: 3.75R410A100% CopperAnnual Power Consumption: 722 units.
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Most Energy Efficient (Electricity Saving) 1 ton Inverter AC – Godrej GIC 12 BAH 8 GGQG

If you are looking for the model with the highest ISEER in the market, then you need to look at Godrej GIC 12 BAH 8. This model has an ISEER of 6.15 which is the highest ever seen in the Indian market. It has a rated cooling capacity of 3550 watts (or 1.01 ton) and power consumption of 795 watts. It has an annual electricity consumption (for 1600 hrs) of 453 units which would be very close to what your air cooler would consume for that much usage. This model is part of NXW series from Godrej which all come with R290 which is the greenest refrigerant in the market. This model comes with Aluminium condenser with solid corrosion protection. It has BLDC motors for IDU, ODU and compressor which makes it efficient. It has 2 stage air filters for dust, viruses, bacteria and fungi. It comes with 10 year compressor and 5 year condenser warranty. Good buy if your usage of AC is quite high.
ProsBest in class energy efficiency.High Cooling capacity.Durable (100% Copper).Air Filters for dust, viruses, bacteria and fungiConsAluminium CondenserR290 is environment friendly but highly flammable too.
Keyspecs
Cooling Capacity: 3550 WattsPower Consumption: 795 wattsISEER: 6.15R290Annual Power Consumption: 453 units.
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Best Window Inverter AC – LG JW-Q18WUZA

Window ACs are the most neglected appliance as they have not been improved for years. We at Bijli Bachao usually do not recommend people to go for Window ACs as their technology is quite outdated in general. Most BEE 5 star window ACs are low in efficiency and are equal to BEE 2 or 1 star rated split ACs. They also do not have any of the advanced technologies like filters and sensors. But if you still want to go for a window AC then you must look at LG JW-Q18WUZA which is the first Window AC with inverter technology compressor in India. It is like a revolution in a segment that has been lacking innovation. This model from LG has LG’s Dual Inverter Compressor technology which is quick in cooling and is super silent (something that we do not associate with window ACs). It has 100% copper with ocean black protection to protect the AC from corrosion. The AC is also Wi-Fi enabled and thus can be operated using a smartphone. The nominal cooling capacity of this AC is 5000 watts (or 1.42 tons) and ISEER is 3.5 (which is equivalent to an entry-level BEE 3 star split AC). On the whole, this is the best window AC in the market if you want to go for one.
ProsInverter Compressor in a Window AC.Good efficiency.100% copper with corrosion protection.Dual Inverter is quick in cooling and silent.ConsEfficiency still low as compared to split ACs.Lacks air filters and sensors.
Keyspecs
Nominal Cooling Capacity: 5000 WattsNominal Power Consumption: 660~1950 wattsISEER: 3.5100% CopperAnnual Power Consumption: 1106 units.

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