7 Best Stabilizers for Air Conditioners (2021): Buyer’s Guide & Reviews

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If you live in India, you are surely a victim of voltage fluctuations. In these situations, all electrical appliances like LED TVs, washing machines, air conditioners, refrigerators etc. can trip. This can put all your home appliances at high risk. How do we save them? Only a voltage stabilizer can be of some help to you.

Our focus today is on air conditioners and therefore we are going to talk about the best stabilizers for ac’s. A carefully chosen, right kind of stabilizer will keep your air conditioner protected from voltage fluctuations. How does this happen?

The stabilizer will sense this harmful voltage fluctuation and tame it down before sending it to your air conditioner.

Most people do not find voltage stabilizers worth a buy and I was no exception to this. Until one fine night when I was a victim of a horrified incident. The air conditioner in my room was running all night. Little did I expect the power to surge and all the components of the AC to get damaged. That’s when I learnt the biggest lesson of my life. I was trying to save some money by avoiding buying a voltage stabilizer, but in the process, I ended up having to take care of a bigger damage.

So, if you are looking for hassle free operations, you need to invest in the best voltage stabilizer for air conditioners today. Let’s find out how.

What factors to consider before buying a stabilizer for AC?

Before you choose the best stabilizer for your ac, here are a few factors you must consider. Here are some important features for an ideal stabilizer.

  • Indicators
  • Time delay
  • Capacity
  • Mounting
  • Overload protection
  • Digitized
  • Working range
  • Surge protection
  • Warranty

Top 7 Best Stabilizers for 1.5 ton or 1 ton AC (2021)- Reviews & Comparison

S,No.ProductsWorking Range Buy Now
1.V Guard Voltage Stabilizer160V-280VCheck on Amazon
2.Microtek Voltage Stabilizer160V-285VCheck on Amazon
3.MONITOR Mountable Voltage Stabilizer170-270VCheck on Amazon
4.V Guard Stabilizer for Inverter AC140V - 280VCheck on Amazon
5.Everest Voltage Stabilizer for AC130-300VCheck on Amazon
6.V Guard AC Stabilizer 160- 280VCheck on Amazon
7.Microtek Automatic Voltage Stabilizer 170-270VCheck on Amazon

1. V Guard VG 400 Voltage Stabilizer – Best Overall

Key Features:

  • Capacity: Upto 1.5 ton ac
  • Working range: 160V-280V
  • LED indication
  • In built thermal
  • Intelligent time display
  • ABS plastic body
  • Warranty: 3 years
Why should you buy V Guard VG 400 Voltage Stabilizer?

V Guard has been recognized as India’s most outstanding brand for its excellent performance and high-end features. The stabilizer has a lot of smart features.

V Guard has an intelligent time delay technology to ensure enhanced safety for the ac’s compressor.

In case the stabilizer is off for more than 3 minutes it will switch on immediately. In a situation of power failure, the stabilizer will go off. It will switch on automatically once the power is back. The stabilizer features a user-friendly LED indicator. Once the device is on, this LED will glow and display the input and output performance. What do we love about this stabilizer? It has an in-built thermal overload protection. This is a saviour in times of internal short circuit, overheating of your device or excessive consumption of power. Your air conditioner will be protected from burning out.

V Guard stabilizer is wall mountable. Hence, you do not need any extra space to get it installed. It is compact in size and has an aesthetically pleasing design. The stabilizer also features an advanced IC technology design to ensure a more reliable output voltage.

Lastly, V Guard has all the safety features like high and low voltage cut off, initial time delay and is fire retardant. Without a doubt all these high-end features make V Guard one of the best stabilizers for 1.5-ton inverter ac.

Things we like
  • High low voltage cut off
  • Micro controlled circuitry
  • Wall mountable
  • Fire retardant
  • Advanced IC technology design
Things we don’t like
  • Has compatibility issues sometimes

2. Microtek EM4160 + Voltage Stabilizer for AC – Best Budgeted Stabilizer

Key Features

  • Capacity: 1.5 ton
  • Auto restart
  • Wall mountable
  • Working range: 160V-285V
  • Internal thermal management
  • Digital display
  • Warranty: 3 years
Why should you buy Microtek EM4160 + Voltage Stabilizer for AC?

The highlight of Microtek EM4160 is the ‘save power technology’. It focuses on stabilizing the utility voltage before it passes to the connected air conditioner. Sounds great right?

Let’s tell you why it has made it to our ‘best stabilizers for ac’. Microtek is equipped with all high-end features. The brand has also been awarded to have the most energy efficient voltage stabilizers.

The stabilizer is ideal for a 1.5-ton air conditioner. To ensure a long life of your air conditioner, the stabilizer comes with few latest technologies. It is capable of working smartly at a wide range of 160-285V.

We quite like the design of this voltage stabilizer as well. It has an attractive looking metal design. The body is sleek, compact and can be easily wall mounted. The sturdy design makes the stabilizer durable and reliable.

Microtek also features a seven-segment digital display and an intelli thermal management to give the user all the convenience. The stabilizer will protect your air conditioner from getting damaged internally. It will ensure your air conditioner does not start immediately after any power cut or voltage fluctuation. The smart time delay mechanism looks after this aspect.

This voltage stabilizer does not stop impressing us here. It has an intelli microchip design and a silver caked relay to ensure maximum comfort for the user.  The three-year warranty on the product and the automated functioning will make this voltage stabilizer a win-win for you.

Things we like
  • Reasonably priced
  • Advanced micro-chip controlled operation
  • Wide input range
  • Advanced seven segment display
  • Sturdy
Things we don’t like
  • Bulky and overweight

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3. MONITOR 4-KVA Mountable Voltage Stabilizer – Best for 1.5 Ton AC

Key Features:

  • Capacity : 1.5 ton ac
  • Wall mountable
  • Working range: 170-270V
  • 100% copper windings
  • LED display
  • Thermal protection
  • Warranty: 5 years
Why should you buy MONITOR 4-KVA Mountable Voltage Stabilizer?

Monitor has made it to our best voltage stabilizers for ACs since it has most of tshe features your air conditioner would require. Like the above ones, even this one a high low voltage cut off stabilizer. It is capable of cutting off the power supply outside the voltage range, which is 170V-270V. The stabilizer is equipped with an epoxy coated metal body to ensure a level of durability and reliability. The design is attractive, sleek and light in weight. The stabilizer can be wall mounted as well as kept on the floor.

So, what is the USP of this voltage stabilizer? Most stabilizers have an aluminum winding, but Monitor has a 100% copper winding. This makes the appliance energy efficient so you can be sure of low energy bills. Another feature that makes this voltage stabilizer stand out from the others is the five-year warranty phase. The stabilizer can also be replaced up to five years in case of any service issue.

Well, we are slightly disappointed with the stabilizer since it lacks two important features. Monitor has no provision for time delay and a LED display. But if you are looking to protect the internal components of your air conditioner, this stabilizer will do an efficient job.

Things we like
  • Energy efficient
  • High and low voltage protection
  • Copper coiling
  • Provision for 5 years of replacement
  • Can be wall and floor mounted
Things we don’t like
  • Lacks an input-output display
  • No time delay feature

4. V Guard ID4 Ace 5540 – Best Stabilizer for Inverter AC

Key Features

  • Capacity: 1.5 ton
  • Working range: 140V – 280V
  • LED display
  • In built thermal protection
  • Initial time delay feature
  • Electromagnetic interference
  • Double booster
  • Warranty: 3 years
Why should you buy V Guard ID4 Ace 5540 Stabilizer for Inverter AC?

V Guard has made it to our list yet again, because in our view it is one of the most trustworthy brands. What brings it to our ‘best voltage stabilizers for acs’? A few common, but also a few uncommon features. Let’s find out. The USP of this V Guard stabilizer? It has an electromagnetic interference filter which will suppress all the electric waves and keep your air conditioner safe. The stabilizer also has a double booster to ensure high end performance in case of any power fluctuations.

The stabilizer has a wide working range of 140-280V. This ensures optimal output voltage for your air conditioner so that you enjoy uninterrupted cooling. Excessive consumption or a short circuit can of course damage all the internal components of your air conditioner. The in-built thermal overload protector will protect your AC from burning out.

Like most other stabilizers, this V Guard stabilizer also features an intelligent time delay mechanism which is very useful in times of power failure. So yes, the stabilizer is packed with all safety features. You can give your 1.5 ton inverter AC a layer of safety with this V guard stabilizer.

Things we like
  • Micro controlled operations
  • Sharp voltage control
  • Seven segment digital display
  • Safe circuit design
  • Wide input range
Things we don’t like
  • Pricing is on the higher side

5. Everest EWD 400-D Voltage Stabilizer for AC

Key Features

  • Capacity: 1.5 ton
  • Working range: 130-300V
  • German technology
  • Double booster
  • Intelligent time delay
  • Circuitry technology
  • Warranty: 5 years
Why should you buy Everest EWD 400-D Voltage Stabilizer for AC?

Looking for the best stabilizer for your 1.5-ton inverter ac? This Everest voltage stabilizer is a good option.

Have you ever noticed sudden spikes in your power supply? This happens due to power failure or short circuit, which can lead to internal damage of your air conditioner. Keeping this in mind, Everest features an in-built spike protection technology to protect your AC and keep it away from these voltage spikes. The stabilizer has copper windings instead of aluminium. Do you know what are the benefits of this? Less heat generation and more power. The stabilizer works on the power saving technology.

The in-built thermal sensor will sense in any excessive consumption of energy and disconnect the power load accordingly. This will keep your air conditioner protected from burning out. Like most other stabilizers, Everest also features an intelligent time delay feature, advanced IC technology design and a double booster.

You can order for this Everest stabilizer online without having any worries of it getting damaged during the transit. The packaging is done especially keeping safety in mind. The USP of this stabilizer is it ensures additional safety with the toroidal transformers. This is the latest German technology. So, this Everest voltage stabilizer will totally be worth your investment.

Things we like
  • Advanced IC technology design
  • Spike protection
  • 100% copper winding
  • Built in thermal protection
  • Short circuit protection
  • E commerce friendly packaging
Things we don’t like
  • Poor customer service

6. V Guard AC Stabilizer ID4

Key Features

  • Capacity: 1.5 ton
  • Working range: 160- 280V
  • Low and high voltage cut off
  • Built in thermal protection
  • Digital display
  • Intelligent time delay system
Why should you buy V Guard AC Stabilizer ID4?

V Guard stabilizers work amazingly well for a 1.5-ton capacity air conditioner. What features are you looking for? An in built thermal protection? High and low voltage cut off? Intelligent time delay system? This V Guard AC Stabilizer ID4 has it all.

The highlight of this stabilizer is the presence of a sharp voltage control technology. It will ensure an optimum performance by the compressor. This mechanism will limit the voltage swing to a short span and it promises a steady operation of the air conditioner.

This V Guard stabilizer works in an efficient way fulfilling all your requirements in the voltage range of 160-280V. You will have access to a seven-segment digital display. The smart and attractive LED ring is an added advantage. As per our research this V Guard stabilizer has the best reviews for being the best voltage stabilizer for air conditioners. The fail-safe circuit design, microcontroller option and the sleek makes this V Guard stabilizer a great option for your home. We are taken aback only on one aspect. The warranty period of the product is missing.

Things we like
  • Sharp voltage control
  • Seven segment digital display
  • E commerce friendly packaging
  • Low and high voltage cut off
  • Highly compatible with an inverter AC
Things we don’t like
  • No warranty period

7. Microtek EM4170 + Automatic Voltage Stabilizer for AC

Key Features:

  • Capacity: 1.5 ton
  • Working range: 170-270V
  • LED display
  • Wall mountable
  • Auto restart
  • High and low cut off
  • Warranty: 3 years
Why should you buy Microtek EM4170 + Automatic Voltage Stabilizer for AC?

If you are in search of the best stabilizer for 1.5 ton inverter ac without being harsh on your pocket, this Microtek stabilizer is a great option.

It features high and low voltage cut off protection for a wide range of 170-270V. The automatic stabilizer will stop the supply in case of any fluctuations or power failure. It also operates on the ‘save power technology’ by being extremely energy efficient. Microtek is equipped with an auto start feature. As per the input voltage, the stabilizer can step up and step down. The stabilizer features an advanced seven segment digital display which shows the input and output voltage.

Microtek is wall mountable and is very easy to install as well. It has an ergonomic and a sturdy design. What we don’t like about the product is the lack of time delay feature and the ‘not so appealing design’. There are no red flags on the display as well. Lastly, we would like to mention that the warranty policy offers service within 24-48 hours. So, if you have a small budget to protect your air conditioner, you can surely invest in the Microtek EM4170 + Automatic Voltage Stabilizer.

Things we like
  • Thermal over protectors
  • Sturdy
  • Seven segment digital display
  • Reasonably priced
  • Advanced micro chip-controlled option
Things we don’t like
  • Does not have the time delay feature
  • A little bulky in size
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What things to consider while buying a Stabilizer for Air Conditioner – Buying Guide

Choosing the best stabilizer for your ac is a tough and confusing process. However, you cannot just let your air conditioner get damaged by any voltage fluctuations. So, if you are in search of a voltage stabilizer, our guide is going to help you for sure. We are going to take you through the process of selecting one.


Technology has gone one step ahead to make the functioning easy for users. LED indicators is one such provision. You can view the input and output voltage. So how does this help? You can monitor the performance of the stabilizer and your air conditioner.

Most importantly, you can keep a track on the voltage fluctuation level. All the above listed voltage stabilizers have LED indicators. This is a basic feature. Before the LED indicators were invented, one could understand the performance by keeping a check on the arrow of the indicators. These were called galvanometer indicators.

Working range

The working range of the stabilizer is one of the most important aspects to look into. If the working range of the stabilizer is 150 – 260V, then the stabilizer will stop its functioning if the voltage goes more than 260V or less than 150V. If the voltage is within the range then the stabilizer will function and ensure the input voltage is stabilized and set it as per the required range of output voltage.


A voltage stabilizer, being an electrical appliance, has a certain level of risk involved in it too. If you place the stabilizer on a flat surface, there are chances of it getting damaged. So, we would recommend you to invest in a stabilizer which is wall mountable. You can place it at a high level and this will protect your stabilizer to a certain extent. This will eliminate risk of shocks for you and your family.

Time Delay

Just like your refrigerator, your air conditioner also has a compressor. The compressor gets locked up if it gets disturbed by a power failure. If this happens then the motor consumes a strong current which will cause the compressor to get heated up. This can also cause the compressor to trip. However, the time delay feature can solve this problem. Voltage stabilizers with the time delay feature will ensure the compressor does not switch on immediately and gives it time to come out of this lock period.


Most new voltage stabilizer models are digitized. These models are compatible with most devices. You can easily shift your stabilizer from one device to the other. It can also conveniently be connected with a generator.

Overload protection

Modern voltage stabilizers come with the overload protection technology. So, in this mechanism, the stabilizer stops its functioning incase of any overloading or short circuit. This will protect your air conditioner from burning out.

Surge protection

Surge protection is also known as spike guards. In case of any short circuit there can be voltage fluctuations. If this happens then the surge protection feature ensures supply of current, which is connected to the stabilizer, is stopped immediately. So, you can be sure of your appliance not getting damaged. Everest EWD 400-D Voltage Stabilizer for AC is equipped with the spike protection.


Budget plays a crucial role in influencing any buying decision. Voltage stabilizers are not a big investment. So, you should not be concerned about this aspect. Microtek EM4170 + Automatic Voltage Stabilizer for AC is the most economical option amongst all of the above.


Most brands do come with a warranty period of 3-5 years. So, make sure you buy a voltage stabilizer with a maximum warranty period to ensure maximum protection to your air conditioner.

Benefits of Using Voltage Stabilizer with an Air Conditioner

A voltage stabilizer has now become a necessity for each household. Let’s tell you the benefits of using a voltage stabilizer with an air conditioner.

  • It is a constant power supply to your air conditioner.
  • It will protect your ac from damage due to overload protection.
  • A voltage stabilizer will cost you less in comparison to the damage caused to the appliance.
  • It can regulate the AC power distribution line.
  • The life of your air conditioner will get elongated.
  • It will protect the ac from current spikes, distorted waveforms, voltage surges, impulsive noise etc.
  • It is low on maintenance.
  • The stabilizer will increase the efficiency of your air conditioner.
  • It reduced the level of the risk factor.

How should you decide which stabilizer works best for your AC?

Selecting the right stabilizer for your air conditioner is a little technical. It should depend based upon the energy consumption of the air conditioner and the voltage fluctuations in your area. You should be aware about the rating of the appliance which is usually mentioned as KW, KVA or AMPS. You should also be aware of the nominal line frequency and voltage.

How should you select a stabilizer?

  • The power rating, current and the voltage of the appliance should be checked. This should be mentioned in the user manual or on the specification sticker.
  • The standard service voltage should be 230VAC, 50 Hz.
  • For maximum power, multiply ‘230 by the max current rate. Make sure you add a 20-25% safety margin to the rating of the stabilizer. You may have some buffer if you plan on adding some more devices later.
  • The surge current should also be considered. This current flow once you turn on the device.
  • Since the voltage stabilizer is rating in watts, you may assume a power factor of 0.8 (W+V*A*pf).

Some important points to remember:

  • Be sure you are aware of the nature of the load which you would connect to the voltage stabilizer.
  • Ensure to note down the power (of all the appliances) in watts.
  • The total energy consumption of all the connected appliances will give you the load on the stabilizer in watts.
  • Most stabilizers are measured in VA (volt ampere).
  • For the actual reading in VA from watts, some detailed measurements will have to be taken.
  • You can have a rough approximation by increasing the watts by 20%. This will give you an approximate VA size.
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Frequently Asked Questions (FAQs) about Voltage Stabilizer

To put it in simple words, voltage fluctuations is a continuous change in the voltage. Extreme voltage fluctuations can lead to heavy damages to the person and the appliance.

A voltage stabilizer is thoughtfully designed to ensure a constant voltage irrespective of the uncertain input voltage. The stabilizer can effectively fix voltage fluctuations. It will protect your appliance from under or over voltage.

Getting a voltage stabilizer means taking additional care of your appliance. Inverter air conditioners also require a stabilizer. We have listed all the best stabilizers for an inverter 1.5 ton ac above.

Yes, you surely can use an AC without a stabilizer. But this is a risk. In case of no voltage fluctuation, there is absolutely no issue. However, if there is any voltage fluctuation then it can have serious damages on your AC.

AC stabilizers do not consume a lot of electricity generally. They are energy efficient and consume only 3-5% of the moad.

A consistent voltage is the key to smooth functioning. In case of low voltage, the compressor will pull more current. This can harm the motor and have an impact on the durability of your AC.

Wrapping Up

So by now you know that voltage fluctuations can have serious damage on your air conditioner, hence it is about time you invest in the best stabilizer for ac. We have a few suggestions for you to keep your appliance away from this danger.

Everest EWD 400-D Voltage Stabilizer for AC. Why has this one won our heart? It features a special German technology which ensures safety at a maximum level. It is equipped with an intelligent time delay, double booster, circuitry mechanism, wide working range (130V – 300V), 100% copper windings, thermal protection, advanced IC technology, spike protection and the e commerce friendly packaging. Undoubtedly, it is one of the best copper stabilizers for 1.5-ton ac. Our second recommendation for you is the V Guard VG 400 Voltage Stabilizer. What has impressed us about this stabilizer? The wide working range (160V – 280V), LED indication, thermal protection, intelligent time delay, energy efficiency, high low voltage cut off, micro controlled circuitry, advanced IC technology and the sleek design.

We are sure it is not going to be difficult for you to choose the best voltage stabilizer for your air conditioner now. It is about time you make this smart and sensible investment.


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