6 best voltage stabilizers for a gas boiler

Modern gas boilers are high-quality equipment with a processor system for monitoring and adjusting operating parameters. Of course, electronics are sensitive to voltage drops and any minor surge in the network can damage the control unit, the cost of which in the price of the boiler is 30-50%. This will lead to the heating system stopping (which is extremely undesirable in the winter months) and unplanned expenses, and not small ones. To prevent such consequences, network stabilizers are used to level out differences, and in critical cases simply turn off the equipment.

Our review will look at these devices of various types (the most widespread on the market), which are best suited for protecting heating boilers. The rating was formed based on the characteristics declared by the manufacturer and the experience of the owners of this equipment.

The best inverter voltage stabilizers for gas boilers

Stabilizers of this type react faster than others (instantly) to changes in voltage in the network, which provides better protection of equipment from surges. They operate on the principle of double conversion, which determines the unique characteristics of the device. In the private sector, due to weather conditions or other reasons, an increase to 380 Volts (phase-to-phase short circuit) can easily occur, which will damage even the electronics that are connected through the stabilizer (at its low response speed). Those who are not at risk of the consequences of an emergency are the owners of inverter protective devices, the best models of which are presented below.

The best models in terms of price/quality ratio

The presented models are distinguished by their affordable cost, sufficient response speed and good stabilization accuracy.

Rating of the TOP 5 voltage stabilizers for a gas boiler in terms of price and quality.

Defender AVR Typhoon 1000

Single-phase stabilizer Defender AVR Typhoon 1000 with built-in surge protector is one of the most economical solutions for domestic gas boilers.

The device is equipped with an automatic voltage regulator, overload and overheat protection, and an automatic fireproof fuse.

The output voltage with an error of 10 percent can vary within acceptable values ​​from the nominal values ​​of 198-242 V.

Informative LED indicators allow visual monitoring of the device status.

The stabilizer has compact dimensions and light weight.

Specifications:

• stabilizer type - relay;
• rated power - 320 W;
• input voltage - 175-285 V;
• stabilization accuracy - ±10%;
• output voltage - 198-242 V;
• information display - LED indication;
• protection - against short circuit/overheating/overvoltage/interference;
• load connection - 2 sockets;
• overall dimensions - 115x110x140 mm;
• device weight - 1.5 kg.

Advantages

• compact dimensions;
• two sockets for connection;
• Illuminated power button;
• visual indication of modes;
• good build quality.

Flaws

• short connection cord;
• high noise level;
• low power.

RESANTA ACH-2000/1-C (2 kW)

The RESANTA ACH-2000/1-C (2 kW) model with protection against overheating and overload will solve the problem of unstable power supply to household gas boilers by maintaining optimal voltage in the network.

The holes located on the unit body provide natural cooling of the components. Internal elements are protected from mechanical damage by a reliable housing.

The electronic display of the single-phase device shows operating parameters.

The auto shut-off system is responsible for safety when the maximum permissible power is exceeded. The response time is 5-7 ms.

Specifications:

• stabilizer type - relay;
• rated power - 2000 W;
• input voltage - 140-260 V;
• stabilization accuracy - ±8%;
• output voltage - 202-238 V;
• display of information - digital display;
• protection - against short circuit/overheating/overvoltage/interference;
• load connection - 1 socket;
• overall dimensions - 140x170x237 mm;
• device weight - 5.8 kg.

Advantages

• stability of work;
• small sizes;
• low price;
• low energy consumption;
• ergonomic design.

Flaws

• no indication of current input/output voltage;
• heating during operation;
• loud relay.

SVEN AVR SLIM 1000 LCD (0.8 kW)

The compact SVEN AVR SLIM 1000 LCD stabilizer will reliably protect an electric gas boiler with an active power of 0.8 kW from high-voltage pulses, short circuits, overheating and overload.

The switching time of relay equipment does not exceed 10 milliseconds.

The input voltage can vary from 140 to 260 V, the output provides optimal 220 V with a frequency of 50 Hz.

The gray metal body of the device is equipped with elements for wall mounting, and a built-in digital voltmeter displays the input and output voltage.

A standard socket is provided to connect the load; the thermal breaker acts as a fuse.

Specifications:

• stabilizer type - relay;
• rated power - 800 W;
• input voltage - 140-260 V;
• stabilization accuracy - ±10%;
• output voltage - 198-242 V;
• display of information - digital display;
• protection - against short circuit/overheating/overvoltage/interference;
• load connection - 1 socket;
• overall dimensions - 290×175×60 mm;
• device weight - 2.9 kg.

Advantages

• stylish design;
• possibility of wall mounting;
• reliable metal case;
• power supply indication;
• template with fastener markings included.

Flaws

• audible relay clicks when switching;
• short input cord;
• one socket on board.

ERA SNPT-2000-C

The ERA SNPT-2000-Ts device with a declared efficiency of up to 95 percent is recommended for stabilizing the power supply network for domestic gas boilers and other sensitive equipment.

The stabilizer is capable of handling an active load with a total power of 2 kW.

Connection of consumer devices is carried out to two sockets.

The unit is supplemented with a digital display, which allows you to determine the main parameters and control the operation of the device.

Natural passive cooling in the form of ventilation grilles on the case is responsible for cooling the elements. The model can be installed on the floor.

Specifications:

• stabilizer type - relay;
• rated power - 2000 W;
• input voltage - 140-260 V;
• stabilization accuracy - ±8%;
• output voltage - 202-238 V;
• display of information - digital display;
• protection - against short circuit/overheating/overvoltage/interference;
• load connection - 2 sockets;
• overall dimensions - 140×188×265 mm;
• device weight - 4.7 kg.

Advantages

• high-quality assembly and materials;
• relatively quiet operation;
• two sockets for connection;
• small dimensions and weight.

Flaws

• unstable legs;
• very bright display.

TEPLOCOM ST-555-I, white

The single-phase stabilizer TEPLOCOM ST-555-I with the possibility of wall-mounted installation in close proximity to the consumer device is designed to power gas heating boilers with a power of up to 0.4 kW.

When developing the presented model, the basic requirements for the parameters of their power supply were taken into account.

The stabilizer is equipped with microprocessor control, an accident protection system with automatic recovery, and an emergency indicator.

The device provides quick and easy connection; for this purpose there is a standard Euro socket on board.

Specifications:

• stabilizer type - relay;
• rated power - 400 W;
• input voltage - 145-260 V;
• stabilization accuracy - ±9%;
• output voltage - 200-240 V;
• display of information - digital display;
• protection - against short circuit/overvoltage;
• load connection - 1 socket;
• overall dimensions - 130×170×85 mm;
• device weight - 1.8 kg.

Advantages

• compact dimensions;
• input voltage indication;
• has all the necessary functions;
• ease of use;
• holds overload well.

Flaws

• short cord;
• only one socket.

Customer Reviews

Maksim

RUCELF BOILER-600 (0.6 kW)

I bought it for a gas boiler. Boiler 600. I was choosing between Calm and Rouself. I decided to support the domestic manufacturer. Everything is fine, the case is steel, powerful, looks good, but the Chinese button that switches the voltage display modes somehow treacherously sticks out half-sidedly onto the floor of the case... I looked, yeah, they sprayed so much paint that the button stupidly doesn’t fit into its place and one of the buttons is already broken out of the fastening tabs, apparently they pushed it - it didn’t fit, they pushed it harder, broke off the tab, well, what the hell with it... Damn it’s a shame! Well. I cut off a drop of paint in the hole, bought a new button, soldered it, installed it... Everything works. It's a small thing, of course, but unpleasant. To immediately disassemble a new thing and, even though it’s such a small thing, still repair it. But overall it works great. There are no complaints about the work.

Pavel Sergeevich

Energy APC 1500

So, the stub was bought for 4300₽ in 2022 for a gas boiler and the ability to connect to it the pump that is in the well. It works with the boiler without problems, I don’t know how accurately it stabilizes, I checked it with a multimeter during drawdowns, it seems to be normal, but you won’t be constantly monitoring it, I looked at it a couple of times and scored. Sometimes when you turn on the boiler, the display blinks strangely, like it turns off and turns on a couple of times, then normal. Sometimes several parts of the numbers disappear on the display. The display is generally useless, 99% of the time it shows the same thing, only occasionally the load changes. Even if the “input” is 180V, it will still show 230V. Next, work in tandem with a pump (about 1 kW, I don’t remember exactly). For some reason, sometimes it goes into overload protection, not always, but about once out of 20. And this is a real problem, because if it goes into protection at night and it doesn’t restart, you need to flip the switch, then by morning it’s already fresh . The heating doesn't work either. There may be a problem with the pump, but directly from the network it works without failures. And if the problem is with the pump, then why 19 times out of 20 it starts normally, with a load of 60-70% (this is paired with the boiler). Krch, it’s not yet very clear why this problem is happening, later I’ll check using a wattmeter (when it arrives) how much the pump (and the stub itself) eats at peak, I’ll add if anything happens.

Maxim R.

Huter 400GS (0.35 kW)

The company already has the same stabilizer, but on the boiler. Works stably. Therefore, when the question arose about power supply for the video surveillance alarm, I suggested that the installers install the same, time-tested one - and received approval. Moreover, it “maintains” the output voltage when the input voltage is from 120 to 260 V - it works in both directions. Stabilization errors are acceptable. Has a couple of output sockets. Does not require care or maintenance. The stabilizer is low-power, but not cheap. But such a device, which produces a stable sine wave at the output, cannot by definition be cheap. Such a miniature stabilizer was purchased for the very specific purpose of providing high-quality power to the gas boiler. The stabilizer copes with this task perfectly. It takes up very little space and hangs on the wall under the boiler.

Alexander

RESANTA ACH-15000/3-EM (15 kW)

The stabilizer was installed in a village house three months ago. Online surges are a common thing in our village; equipment has broken down more than once, both for us and for our neighbors. But now we are calm about the safety of the washing machine, refrigerator and TV. The equipment equalizes the voltage in the network immediately, the voltage indicators are visible on the display. Stabilizer with good efficiency, with functions against short circuit and overheating. The device operates quietly and takes up little space.

Yuri

Calm IS350 (0.3 kW)

I purchased this stabilizer on the recommendation of competent people to protect the wall-mounted Westen Quasar d24fi boiler; the board in these boilers is famous for its demands on the quality of the supply voltage. I bought a stabilizer in the modification for 230 V output voltage, because... The boiler's data sheet indicates exactly this voltage. There are simply no analogues in terms of the speed of response to changes and the accuracy of maintaining the output voltage at this price; Chinese crafts such as all sorts of Svens and Resants have significantly worse performance, a large error in the output voltage, and what is especially important is that Chinese stabilizers do not produce a pure sine wave at the output, there is information on the Internet There are many demonstrative tests with the connection of various stabilizers via LATR to an oscilloscope; the output voltage steps are clearly visible, which is not the case with the Shtil stabilizer. The stabilizer turned out to be unexpectedly very small and light, I expected it to be larger and heavier, there is nothing superfluous - a power button, three signal LEDs and an output socket, a bracket for mounting to the wall is included. The cooling of the stabilizer is passive, it works completely silently, it does not heat up much, it does its job - the boiler does not respond to power surges when the light bulbs begin to flicker. An excellent stabilizer.

Egor Z.

RUCELF BOILER-600 (0.6 kW)

I bought this stabilizer for a small store operating in the private sector. Constant problems with voltage, especially in winter.. I have never regretted buying it. After installation in place, 220V remains stable. Serves two refrigerators, a cash register and a small TV. Basically, I purchased this model because of the inappropriate voltage stabilization range. I've been using this model for about a month now. Overall, I'm happy with everything. The advantages are, firstly, quite high power and stabilization speed. There is no noise during operation. I would also like to note the function of protection against overheating and overvoltage, which is quite convenient and useful. In general, not a bad model.

Shamil

Energy APC 1000

Was purchased for a gas boiler in the village. The boiler installers were unable to connect it due to the impossibility of finding the right plug. Later I had to buy an adapter. You can use a computer cable instead of the standard one. BUT... if you take a cable with an angled plug, you will not be able to use both sockets, because... one plug will interfere with the other, and the switch will be blocked by the cable. What prevented you from installing sockets by rotating them 90 degrees... or using a different type of sockets? Scoreboard. Not the same as the picture in the description. The scoreboard itself is round, three-line. On the middle line, the numbers “220” are constantly lit in large font (a successful marketing ploy); on the top line, in small font, the readings of the power used are displayed. On the bottom line, also in small print, the input voltage is displayed. As I already noted, the display is very bright... the night lights are resting. It looks like the developers listened to marketers who are unfamiliar with the concept of ergonomics. As for the technical side, a conventional relay stabilizer... is no better or worse than others.

Juliana E.

RUCELF BOILER-1200 (1.2 kW)

The stabilizer attracted attention because it was made in Russia, and this, according to my observations, indicates good quality. It turned out to be not only simple to use, but also reliable, especially during voltage surges. The automation is quite sensitive, so having been using the stabilizer for about a year now, I don’t have to worry about the safety of the boiler equipment. During all this time, no interruptions in its work were noticed. I am definitely satisfied with the purchase.

Anton Esyakov

RESANTA ACH-9000/3-EM (9 kW)

The stabilizer was purchased for a garage where equipment powered by a 3-phase circuit is used. And since the voltage in all phases is always low in our life, without a stabilizer some equipment simply refuses to work. A 9 kW voltage stabilizer is quite enough to operate the equipment, since I don’t turn it all on at once anyway.

Pavel L.

Calm IS550 (0.4 kW)

Advantages: Compact, quiet and most importantly the response time to voltage drops is 0 ms. Perfectly smoothes out the consequences of welding work in the same phase and does not lose performance at critically low voltage. I was very pleased with the device’s ability to withstand overloads and return to operating condition without outside intervention, as well as the ability to turn off the load when the voltage limits are exceeded. What is especially valuable in boiler rooms. Disadvantages: There are practically no disadvantages. Comment: I bought it to replace a relay stabilizer, which did not have time to handle sudden voltage drops, as a result, when there was a sharp jump in voltage from low to high, it did not have time to switch and everything burned. The Stihl IS 550 reacts instantly and there are no such problems with it. In my case, it would be convenient to have a second outlet, since the 350 model is enough for one boiler, and the 550 just copes with two boilers, and given the installation in the boiler room, I would like to have an increased level of moisture protection. Otherwise the model is very successful. A little expensive. but it works great. I recommend this model for installation in a dry place with devices that are demanding on network parameters.

Paul

Calm IS350 (0.3 kW)

Advantages: I have not found an analogue in terms of the quality of voltage stabilization within 220V AC and the provision of a sinusoidal voltage curve. In my opinion, this is the best voltage stabilizer in those cases. when it is necessary to provide a high-quality level of stabilization and the shape of a sine wave of alternating current. The device is lightweight, 1550 g, high-quality body and colorful coating correspond in appearance to the highest quality devices of international standard. The light indication clearly indicates the operating mode status of the device, which gives confidence when working with it and understanding the process. Disadvantages: The only, but still disappointing, quality of the output socket of the device. It simply dangles, since its fastening is extremely unreliable. Provided that the socket openings are protected by closing curtains, which are very tight and require strong pressure from the plug of the powered appliance (in my case, an extension cord with several sockets at the end), when connecting it to the socket, the impression is created. that the socket may completely break or fall off. For myself, I decided to plug the extension cord into the outlet once and never take it out again. Comment: I bought the device with a 220V output voltage modification. With continuous fluctuations in the network at the input from 208V to 240V, the output is constantly maintained without any fluctuations, even at least 1V, the voltage of 217V. I took the device to provide reliable power to expensive cinema and audio equipment during the field expedition along the coast of Chukotka, where extremely unstable voltage in the villages is provided by local diesel generators. Weighing just 1.5 kg is the minimum price to pay for reliable power to expensive and critical expedition equipment. The price is not even remotely close to insuring such equipment. I count on the reliability of the stabilizer. While it's working. I can confidently power my equipment and camera battery chargers. This is the only device on the market with this principle and, accordingly, the quality of stabilization - as long as it works.

Oksana Sergeeva

Calm IS550 (0.4 kW)

We spent a long time choosing a stabilizer to protect the Bosch WBN 6000 gas boiler, because... it is very sensitive to voltage changes. On the recommendation of a friend, we began to look at the InStab IS550 inverter stabilizer and, after studying the characteristics, reviews and testimonials, purchased it on the official website. They took it from a representative in Krasnodar. Large stabilization range, absolute noiselessness of the model, which takes up minimal space, being on the wall next to the boiler. I am glad that the stabilizer is of domestic production. Used to protect the boiler and water pump for over a year.

With external battery connection

Stark Country 1000 Online

pros

• affordable price
• reliable device
• compact
• pure sine wave
• fast response

Minuses

• The fan is very noisy

From 17965 ₽

Those who choose a suitable stabilizer among UPS for boilers with an external battery connection should take a closer look at this model. The device operates using the double current conversion method, resulting in a correct sine wave, ideal for gas boilers and other equipment. Additional batteries are used only when there is no current in the network.

Main types

There are different types of power stabilizers for a gas boiler:

• servo driven They are otherwise called electromechanical. This is the simplest design that has come since the times of the USSR. The operating principle of such a device is to use an autotransformer, along the windings of which carbon brushes move. When the input voltage changes, the position of the brushes changes using a servo drive, which creates a specified voltage of 240 V 50 Hz at the output. Such designs are simple and cheap, but their speed does not allow solving the problem in the required mode. The time difference between the change and the device’s reaction to it allows the boiler electronics to operate in a dangerous mode for moments. Because of this, control boards often burn out, despite the connected stabilizer;
• relay _ The design of these devices resembles the operation of an autotransformer. Its coils are divided into several sections that produce different values. When the power parameters in the network change, a special relay switches sections, adjusting the output value of the device. These stabilizers are relatively inexpensive, but have a large error value (usually 8%) associated with the step type of adjustment. In addition, the speed of relay stabilizers is low, which jeopardizes the delicate electronics of the gas boiler. The advantages of relay devices are considered to be reliability and low maintenance requirements;
• thyristor . These are modified versions of relay stabilizers. The difference is that instead of a relay, the windings are switched at the command of the thyristors. This greatly increases the performance and service life of the device. Such designs can withstand up to a billion switchings without loss of performance. The disadvantages of thyristor devices include the discrete (step) nature of switching, which sets a high error at the output (the same 8%);
• inverter stabilizers . These are the most accurate and high-speed devices. Otherwise they are called double conversion stabilizers. They have a different design. There is no autotransformer, which makes the devices light and compact. The principle of operation has also been changed - the input alternating current is passed through the filter and becomes constant. A certain amount of energy is stored in the capacitor in order to release the charge at the right time to maintain the flow parameters. Then the reverse conversion is carried out into alternating current with a given value. All actions are performed at lightning speed, in a continuous mode. The output values ​​are adjusted smoothly with high precision. The only drawback of the devices is their high cost.

The most effective models are inverter stabilizers, however, all other devices are in demand and are used to work with various equipment.

Double conversion

Calm IS350

pros

• works quietly
• high accuracy
• pure sine wave
• minuscule error.

Minuses

• does not output exactly 220 V

From 4790 ₽

Among inexpensive inverter stabilizers, this model stands out due to its effective protection against short circuits, overheating, network faults and filtering of impulse noise. Made in a stylish modern design, the device is hung on the wall, where it does not interfere with anyone.

RESANTA ACH-600/1-I

pros

• LED indication
• good cooling
• easy installation
• two output sockets

Minuses

• total power 600 W

From 7202 ₽

Today, advanced inverter uninterruptible power supplies are an ideal solution for protecting heating system equipment from high-voltage surges and input voltage sags, frequency fluctuations, harmonic distortion and electrical interference in the supply network. Model ASN-600/1-I, new for 2022, is suitable for a small cottage or apartment with an individual heating system.

Hybrid

Energy Hybrid SNVT-6000/3

pros

• universal
• wide voltage range
• display indication
• reliable assembly

Minuses

• high price

From 30420 ₽

The three-phase device, produced by , consists of three single-phase stabilizers of 2000 VA each. The device combines two types: electromechanical and electronic, which allows it to work with voltages from 105 V to 280 V.

Volt Engineering HYBRID E 9-1/32A v2.0

pros

• high total power
• bypass
• clear controls

Minuses

• high price

From 17980 ₽

A single-phase stabilizer is ideal for installation in a country house or country house to protect a boiler and other household appliances. It is designed to operate in unstable electrical networks with significant voltage fluctuations from 135 to 315V. An electronic transit function (bypass) is provided.

How to choose and what to pay attention to?

First you need to find out the type of network in the room where the gas boiler is installed. This is how the phase of the required device is determined. There are two or three of them.

To understand how many of them are in your apartment or house, just look at the distribution board.

Single-phase will have two wires, three-phase will have four or five.

Later, the total power of all consumers in your network is calculated. For normal operation, this parameter of the stabilizer must definitely be no lower.

Plus, the range of its input voltages must cover the entire range of changes in the mains voltage. These conditions should not be forgotten.

Important data about the upcoming purchase are its efficiency and response speed . Many are still looking at the design.

For example, they pay attention to the general appearance of the case - the material for its manufacture and color.

The presence of an indication of the temperature range in the design is also interesting. But these are additional features that indicate convenience for specific users.

Some will like the huge, bright display, while others may find it insufficiently informative. Same thing with colors.

The stabilizer is often chosen from products of manufacturers that have already proven themselves on the market..

There is an offer for every budget. When choosing, they are based on their own experience or someone else’s. There are a lot of reviews left on the Internet. Having studied them, a certain picture emerges.

Of course, there are also conflicting data - some praise a certain model, others, on the contrary, write angry comments . For example, for some people the noise level from a car is acceptable, but for you it may seem too loud.

Single-phase or three-phase?

Don't know which one to choose? We will help with this too.

For apartments, offices and workshops, a single-phase stabilizer is preferable . They are usually connected to a 220 V network with a voltage frequency of 50 Hz.

And for enterprises and industries with a heating system that requires connection to a 380 V network, a three-phase device is offered.

You can also install single-phase equipment, one for each phase, which will cost less in total, but will take more time to connect.

Usually they prefer not to bother and not rack their brains over it.

Criterias of choice

The choice of stabilizer is influenced by the following factors:

• power . This parameter determines the ability of the stabilizer to ensure operation when high loads occur;
• input voltage type . There are single- and three-phase devices capable of operating with different voltage ranges. When purchasing, you should clarify what minimum and maximum value limits this device can overcome. The higher the value, the better;
• stabilizer type . The most effective designs include inverter models. However, alternative types are no less effective in their fields. To make the right choice, you should know the features of your networks, the magnitude of normal voltage fluctuations and other specific data;
• installation method . There are floor and wall installation options. Typically, floor-standing models are more massive, while wall-mounted ones are compact and weigh less;
• minimum input voltage . This value is important for residents of remote villages or areas with high loads on the electrical grid. The lower the voltage that the stabilizer is capable of adjusting, the greater the confidence in its effectiveness;
• short circuit protection . For modern models, this function is included in the list of required features. However, there are devices that are not equipped with this ability. It is recommended to check its availability;
• device performance . This is an important parameter that displays the speed of voltage equalization after a surge. The lower the value, the better for the boiler control board;
• additional functions . This includes built-in protection, the presence of a grounding electrode and other options. As a rule, the list of additional features is not too wide, since excess load on devices is contraindicated.

NOTE!

When choosing a device, you should not hesitate to consult with the seller. He will provide the necessary information and help you choose the most suitable sample.