Except for the big metros like Mumbai, Delhi, and so on, you experience voltage fluctuations almost everywhere in India. Almost every night you find the AC tripping up frequently.

Best Voltage Stabilizer in India

As you go deep into the summer months, the frequency of tripping increases manifold. The same is the case with your Led TV, fridge, and washing machines.

When you experience tripping, you also put your electrical appliances at great risk.

The only way to avoid these tripping is to install a voltage stabilizer. Here are some voltage stabilizers that you can install in your house to protect these expensive gadgets.

Best Voltage Stabilizers for AC

1. V-Guard VWI 400 2850-Watt AC Stabilizer

V-Guard is a reputed manufacturer of voltage stabilizers in India. Air conditioners are the worst hit of all electrical appliances during voltage fluctuations. The compressor in the AC units can undergo damage if the input voltage fluctuates above or below the permissible range.

This V-Guard stabilizer can work in the range of 130V to 280V with its maximum output voltage being 240V. The presence of the intelligent time-delay system ensures that the compressor does not get damaged due to sudden voltage fluctuations.

This voltage stabilizer is a safe one to use because it comes with both high and low voltage cut-off protection feature where the stabilizer stops functioning when the input voltage is outside the range of 130V to 280V. It is compatible with both the regular and inverter AC units.

The wall mounting feature of this voltage stabilizer is an advantage as it does not come in contact with water, especially when you clean your house. It also allows you to keep this stabilizer out of reach of children.

This three-phase stabilizer has a digital indicator that indicates the output voltage. It is a long-lasting stabilizer as it comes with a manufacturer warranty of three years.

2. V-Guard VDI 400 Voltage Stabiliser

This V-Guard VDI 400 stabilizer is the ideal one for a 1.5-ton air conditioning unit. This stabilizer comes with various useful features that not only protect your AC unit but also looks attractive and blends with your house interiors.

Installing this voltage stabilizer is easy. All you have to do is to mount it on the wall and connect the AC wires to it. You connect this stabilizer to the mains current whereby the current passes through this appliance to your AC. It acts as both a step-up and step-down voltage stabilizer.

The intelligent time delay feature provides a proper balancing time for your AC compressor and protects it from frequent power outages and erratic voltage fluctuations.

This stabilizer works within a specific range of voltage. It shuts down automatically if the input voltage is outside this specific range thereby protecting your AC from low and high voltage.

This stabilizer comes equipped with a thermal overload protection feature comprising of dedicated sensors to protect the stabilizer and the AC units from high temperature burnouts during overload conditions.

This voltage stabilizer comes with a 3-year manufacturer warranty.

3. V-Guard VG 400 Voltage Stabilizer

Here is another V-Guard voltage stabilizer, the VG 400. This voltage stabilizer is ideal for AC units having capacity up to 1.5 tons only. Usually, you have copper windings in voltage stabilizers. This device comes with 100% aluminium windings.

This unit works in the voltage range of 170V to 270V. It comes with a cut-off feature whereby the voltage stabilizer will switch off the current supply to your AC if the input voltage is outside this specific range.

The intelligent time-delay function protects your AC compressor from damage as it allows for a small time-delay before the compressor starts functioning. The thermal overload functionality protects the stabilizer as well as your AC unit in the case of an overloading situation.

It comes with a wall mounting facility whereby it is a safe appliance. This voltage stabilizer does not have the electronic display units.

4. V-Guard VG 500 Voltage Stabilizer for AC up to 2 ton – 170V to 180V

If you have an AC unit with capacity more than 1.5 tons, you would not be able to use the three voltage stabilizers discussed above. You need to go in for a stabilizer with a higher energy limit. The V-Guard VG 500 stabilizer is ideal for AC units up to 2 tons.

This voltage stabilizer works in the specific voltage range of 170V to 270V. If the input voltage falls outside this range, the stabilizer will shut down automatically thereby protecting your AC unit and the stabilizer as well.

The VG 500 stabilizer comes with a compact wall-mounting design that makes it easy to install and safe to use. It is a cost-effective stabilizer that comes with a 3-year manufacturer warranty.

This stabilizer comes with the ITDS (intelligent time delay system) that protects your compressor from harm and enhances its lifespan. The HMC technology protects the appliances connected to it. The thermal overload protection feature is also a highlight of this voltage stabilizer.

5. Microtek EM4160+ 160V – 285V Digital Display Voltage Stabilizer for AC up to 1.5 ton

Microtek is another reputed manufacturer of voltage stabilizers on the market. It is a wall-mountable voltage stabilizer capable of protecting AC units up to 1.5 tons. It comes with useful features such as auto start, low and high voltage cut-off, and digital display.

This voltage stabilizer works in a range of 160V to 285V. The advantage of this stabilizer is that it cuts off electricity supply if the input voltage is outside this range.

The Microtek stabilizer can work as a step-up as well as a step-down stabilizer depending on the input voltage.

The digital display comes with a seven segment decimal display that shows input voltage entering the appliance from the main grid. On pressing the button, it will indicate the output voltage from the stabilizer. Microtek offers a 3-year on-site warranty for this voltage stabilizer.

Best Voltage Stabilizers for Televisions


6. V-Guard Digi 200 Smart TV Stabilizer with Digital Display up to 70 inches

Compared to the voltage stabilizer discussed above, this V-Guard Digi 200 voltage stabilizer can protect multiple appliances such as DTH set top boxes, Blu-ray players, gaming consoles, and home theatre systems in addition to your smart TVs, LCD/LED and 3D TVs having screen sizes up to 70 inches.

Remember, this system can support different appliances with overall load up to 6 amps.

This stabiliZer has a compact design with a durable cabinet with virgin ABS for superior durability. The seven-segment digital display indicates both the input and the output voltage at the press of a button.

It is a good safety feature that enables you to determine the input voltage. This stabilizer works within a voltage range of 140 to 295V. It comes with surge protection features whereby it protects your expensive electronic appliances.

The stabilizer comes with an EMI filter thereby protecting your electrical and electronic appliances from electronic magnetic waves.

Hence, the TV and home theatre system does not exhibit any audio-visual disturbances. It enhances the lifespan of your electronic appliances.

7. V-Guard TV Stabilizer Mini Crystal Supreme for 32-inches TV

This V-Guard product is one of the best voltage stabilizers for TVs having screen size up to 32 inches. It has multiple outlets whereby you can connect your other appliances such as computers, printers, scanners, routers, fax, and so on. This stabilizer comes with surge and spike protection functions.

The manually replaceable fuse enables this stabilizer to provide protection to your TV and other appliances from short circuits and overloading. The LED status indicator allows you to determine the input and output performance.

This stabilizer has a compact design. You can place it on the ground or table. It comes with a wall mountable facility. Hence, it is a safe voltage stabilizer in many ways. This V-Guard stabilizer can work within a wide voltage range of 90 to 290V.

8. V-Guard Mini Crystal Voltage Stabilizer for up to 32-inch TV

This V-Guard Mini Crystal Voltage Stabilizer is ideal for a 32-inch TV. You cannot use it for the bigger TVs. This stabilizer has multiple outlets whereby you can connect your DTH set-top boxes and the DVD players.

It can function in a voltage range of 90 to 290V. This stabilizer comes with an automatic cut-off feature should the voltage go outside this specific range. It has other notable features like mains turn-on delay and displays 95% efficiency. This voltage stabilizer has a wall-mounted as well as a table-top design.

Best Voltage Stabilizers for Refrigerators and Washing Machines

9. V-Guard VGSD 50 ABS Smart Stabilizer with Digital Display for refrigerator up to 300 litres

This V-Guard voltage stabilizer is unique in the sense that it is the perfect one for refrigerators having capacity up to 300 litres. It can protect both the single and double door refrigerators but the capacity should not be more than 300 litres.

This stabilizer works in the input voltage range of 130 to 290V. One has to be careful with refrigerators as these appliances come with compressors.

Hence, installation of a voltage stabilizer is always preferable even if it comes with a built-in stabilizer. This external voltage stabilizer can protect the fridge from surges and short circuits.

The seven-segment digital display feature enables you to know the input and output voltage on the digital screen. You can keep this voltage stabilizer on top of the fridge as it comes with an attractive and compact design.

10. V-Guard VGSD 100 Refrigerator Stabilizer

This compact V-Guard voltage stabilizer is ideal for refrigerators up to 600 litres. You can also use this stabilizer to protect deep freezers up to 4 amps.

Refrigerators come with compressors. Hence, they need additional protection in case of voltage fluctuations. This stabilizer comes with the ITDS technology that provides a time delay of about 3 minutes thereby protecting the compressor from unnecessary damage.

This voltage stabilizer can work in the voltage range of 130 to 290V. It comes with an automatic shut-off feature whereby it switches off the electric supply if the input voltage is outside this range.

Buying Guide for Voltage Stabilizers

As you move out of the major cities in India, you frequently hear the term, ‘voltage fluctuation.’ Now,

What is voltage fluctuation?

What harm can voltage fluctuations do?

How do you deal with voltage fluctuations?

This buying guide will answer these questions and much more.

What is voltage fluctuation?

Ideally, the input voltage in your home electric circuit is in the range of 220 to 230V AC (Alternating Current). What will happen if the input voltage drops down to below 220V or rises above 230V?

For example, you have the incandescent bulbs in your house. Yes, some houses still use these bulbs even after the introduction of the LCD and LED bulbs and tubes. Have you ever seen them becoming dim at times where you can see the filament clearly without straining your eyes?

It is a result of low voltage. Similarly, you also see extreme brightness due to high voltage. This dropping and rising of the input voltage over the standard 230V is what we refer to as voltage fluctuation.

Reasons for voltage fluctuations

There are many reasons for voltage fluctuations. One of the primary reasons is the fluctuation in the input supply from the main grid.

Bad wiring in the house or inadequate earthing can also cause voltage fluctuations. Short circuit is also one of the reasons for voltage fluctuations.

They can also occur when you suddenly switch on high-powered appliances such as AC units, electric motors, pump sets, and so on. Overloading can also cause voltage fluctuations.

Can Voltage fluctuations harm your appliances?

Usually, all home circuits have circuit breakers. Therefore, if there is any voltage fluctuation beyond the acceptable limits, the circuit trips thereby protecting your appliances from harm.

Technically speaking, a sudden switch off will not harm your appliance. However, there can be voltage surges during the restoration of the current supply. This surge can damage your electronic appliances.

In the absence of a circuit breaker, low voltage can cause harm to appliances that use motors or compressors.

The Solution

The solution is to install a voltage stabilizer and ensure that the electric supply to your electrical appliances like AC, TV, fridge, and washing machines passes through the voltage stabilizer.

The Role of the Voltage Stabilizer

The name suggests that the voltage stabilizer is a device that stabilizes the voltage. In other words, it brings the voltage to the desirable range during any fluctuation.

If the input voltage is higher than the acceptable range, the stabilizer reduces the output voltage. On the other hand, if the input voltage is low, it steps up or increases the output voltage.

The voltage stabilizers use electronic regulators that use tap changers with autotransformers.

Thus, the voltage stabilizer acts as a safeguarding mechanism between your equipment and the utility by constantly monitoring the fluctuations and maintaining the output voltage in a trouble-free range.

The choice of the right voltage stabilizer

The sizing of the stabilizer depends on the load you connect to it. Note down the power consumption of all the appliances that you propose to connect to the voltage stabilizer.

The sum total of the power consumption figure of the individual components gives you the load on stabilizer in watts. The stabilizers sizes come in Volt Amperes (VA) or Kilo Volt Amperes (KVA). 1 KVA = 1000 VA.

You have your power consumption load in watts. You need to convert this figure into VA. As a thumb rule, you can add 20% to the watts value to get the approximate VA size you need.

Therefore, if your proposed consumption is 1000 watts, you should go for a voltage stabilizer having capacity of 1200 VA or 1.2 KVA.

Things to look for while buying a voltage stabilizer

Check the input voltage range in your home. Usually, it is 230V AC in India.

Check out the range of the voltage stabilizer. If you opt for a stabilizer in the range of 150V to 250V, it means that the stabilizer will switch off the current if the input voltage goes below 150V or above 250V.

If the input voltage is in this range, the stabilizer will stabilize the input voltage and set it to 230V AC, the desirable output voltage range.

Make sure your voltage stabilizer has surge protection or spike guards. There can be a huge surge of input current during restoration of current or during lightning strikes and short circuits.

Under such circumstances, the surge protection feature switches off the current supply to the connected appliance and ensures there is no damage to it.

Salient features of a voltage stabilizer

You should look into these salient features while purchasing a voltage stabilizer.

High-level mount
Placing your voltage stabilizer on the ground can be unsafe because there is a danger of it getting wet or damaged.

Secondly placing it at a high level not only protects it from damage but also prevents you or your children from exposure to accidental electric shocks.

The modern-day voltage stabilizers come with LED indicators that display the input and output voltage.

In the olden days, you had the galvanometer-type indicators where you have to ascertain the reading by watching the movement of the arrows on the calibrated indicators.

Digital models
The advantage of the digital stabilizers is that they adapt well to different appliances. You have to plug in the devices to these stabilizers and avail the benefit.
Time Delay Function
Your appliances like the AC and the refrigerators have compressors. These compressors need sufficient time to balance the current flow during a power cut situation. The voltage stabilizers come with the time-delay function that enables a time lapse to protect these compressors.
Overload Protection
The present-day voltage stabilizers come equipped with an overload protection feature whereby the voltage stabilizer switches off the current supply in case of short circuits or overloading.

Frequently Asked Questions – Voltage Stabilizers

Final Words

Now, you would not find it a challenge to buy the right voltage stabilizer for your expensive electrical and electronic appliances.

We have discussed the buying guide in detail and reviewed about a dozen voltage stabilizers for different appliances such as AC units, TVs, and refrigerators.

1. Do we have multiple-phase voltage stabilizers?

Just as we have single-phase and three-phase current supply, we have multiple-phase voltage stabilizers. However, you will need using these three-phase voltage stabilizers only if you have a three-phase motor or you require providing stabilizing voltage for the entire three-phase setup.Usually, our electrical and electronic appliances work on the one-phase stabilizers.

There is no need to connect your entire house to a voltage stabilizer. These stabilizers also consume electricity. If you use these devices for a single appliance like your AC or your TV, you can always switch it off when not required.

2. How much current do these voltage stabilizers consume?

Many people are unaware that voltage stabilizers also consume electricity. The energy consumption of the stabilizers depends on their efficiency. A stabilizer with an efficiency of 95% to 98% (as is the norm) will consume 2% to 5% of the load.

Resultantly, a 1000 VA stabilizer will consume up to 50 watts (peak load). Leaving the stabilizer switched on for 10 hours can result in consumption of 0.5 units of electricity.

3. Is it advisable to have individual stabilizers or a consolidated mainline stabilizer?

Not all your electrical devices need the support of a stabilizer. You should be protecting your expensive appliances such as refrigerators, washing machines, televisions, air-conditioners, and so on with voltage stabilizers.

It is better to use dedicated UPS for computers as the UPS mechanism is different from that of a stabilizer. As voltage stabilizers also consume electricity, you should not use mainline stabilizers. You can switch off the individual voltage stabilizers if you do not intend to use the appliance.

4. What is the concept of in-built voltage stabilizers in the modern refrigerators and TVs?

Most of the modern TVs, refrigerators, and AC units come with in-built voltage stabilizers. The usage of electronic circuits like the SMPS (Switch Mode Power Supply) makes voltage management easy. The present-day LED TVs can work even under low voltage.

The mechanism is such that they can work in the voltage range of 110V to 290V. Therefore, there is no need to have a dedicated voltage stabilizer for such devices. Even refrigerators, AC units, and washing machines come equipped with such in-built stabilizers.

5. Are there different stabilizers for different appliances?

Every appliance in the house has different features. They come with specific energy limits. Depending on the energy limit, you need voltage stabilizers. The manufacturers engineer these voltage stabilizers after considering the energy limits of these appliances.

Hence, you have different voltage stabilizers for TVs, washing machines, ACs, refrigerators, music systems, ovens, and so on. The following categories of voltage stabilizers are available in India.

Digital Stabilizer for LED/LCD TV and Music Systems, Stabilizers for CRT TV and Music Systems, Stabilizers for AC, Stabilizers for Washing machines, microwave ovens, and treadmill, Stabilizers for Refrigerators, Mainline Voltage Stabilizer

6. Why do LED/LCD TVs need voltage stabilzers when they have in-built voltage stabilizers?

Most of the LED and LCD TVs come with in-built stabilizers that can handle voltage fluctuations in the range 110V to 290V. The only use for the external voltage stabilizers for such machines is that the surge protection feature in the stabilizers protects these appliances from sudden current surges.

Electrical surges can occur when you suddenly switch on high-voltage appliances like electric motors and ACs. It can also occur during lightning strikes, short circuits, and at times during restoration of electricity supply after a long period of power outage.

7. Why do we use UPS for computers instead of voltage stabilizers?

The voltage stabilizer can stabilize the output voltage, but cannot store and power up an appliance. The computers need some time for you save the work and shut it down safely in case of a power cut.

The UPS allows you to do these activities by continuing the electricity supply to the computers even during a power outage.

8. What is the difference between an inverter and a voltage stabilizer?

An inverter is a device that converts DC into AC and helps your appliances function during power cuts. The inverters come with a battery that enables you to store electricity and use during a power outage. The voltage stabilizer does nothing of this sort.

The job of the voltage stabilizer is to stabilize the input current and ensure that the appliance receives electricity within the prescribed voltage range (230V). It does not work during a power outage.

9. What is a step-up and step-down stabilizer?

The principal responsibility of the stabilizer is to ensure that the output current is within the acceptable range of 220V to 240V. If the input voltage is less than 220V, the stabilizer increases the output voltage to a minimum of 220V.

Under such circumstances, you refer to it as a step-up voltage stabilizer. On the other hand, if the input voltage is higher than the standard range, the voltage stabilizer reduces the voltage to maintain the level within the permissible limits. Thus, it acts as a step-down stabilizer.