How Much Electricity Does An Inverter Air Conditioner Use? Here is a detailed post about how to use inverter ac to save electricity. Suppose you are looking for how many hours to use inverter aircon. Then reading this article may help. It also includes inverter aircon power consumption.
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.
inverter aircon power consumption
How Much Electricity Does An Inverter Air Conditioner Use
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
- 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.
- Inverter technology air conditioners adjust their speed/tonnage depending on heat load of a room. Whereas regular air conditioners do not.
- 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.
- 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.
- 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.
how to use inverter ac to save electricity
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 ton||1 ton||1.5 ton||2 ton|
|1 Star AC (mostly non Inverter)||627||843||1246||1648|
|2 Star AC (mostly non Inverter)||596||800||1184||1626|
|3 Star AC (mix of Inverter and non Inverter)||542||747||1104||1448|
|4 Star (mostly Inverter)||464||645||945||1293|
|5 Star (mostly Inverter)||450||554||840||1113|
|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:
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)
Best budget 1.5 ton Split inverter AC – Midea SANTIS PRO 3i (MAI18SP3N8F0)
Most Energy Efficient (Electricity Saving) 1.5 ton Inverter AC – Toshiba RAS-18PKCV2G-IN+RAS-18PACV2G-IN
Best 1 ton split Inverter AC – LG KS-Q12YNZA (5 Star)
Best budget 1 ton split inverter AC – Midea Santis Pro 3i (MAI12SP3N8F0)
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 fungi||ConsAluminium CondenserR290 is environment friendly but highly flammable too.|
|Cooling Capacity: 3550 WattsPower Consumption: 795 wattsISEER: 6.15R290Annual Power Consumption: 453 units.|
|Find it Online|