TOP 12 best voltage stabilizers for a gas boiler: 2021 rating and tips on how to choose

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Published: 06/04/2019

Reading time: 7 min

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To achieve maximum efficiency from the operation of a gas boiler and avoid breakdowns, experts recommend purchasing and installing a voltage stabilizer on it. The types of equipment and ratings of the best models are discussed further in the article.

1 Why do you need a stabilizer for a boiler?
2 Types of stabilizers 2.1 Electromechanical
2.2 Relay
2.3 Electronic

3 Calculation of stabilizer power

3.1 Calculation formula:

4 Connection to a gas boiler

5 Rating of the best stabilizers

Criteria for choosing a voltage stabilizer for a gas boiler

The most common are electromechanical with a servo system, relay with step voltage regulation, inverter with double energy conversion and hybrid models.

Inverter stabilizers are the most accurate and progressive, relay stabilizers are the cheapest and most common.

When choosing this equipment, you need to consider a number of points:

Number of phases. Domestic gas boilers are mainly designed for connection to a single-phase 220 V electrical network. Powerful three-phase equipment requires power from a three-phase 380 V network and the selection of an appropriate stabilizer.
Load power. The output power of the stabilizer must correspond to the same characteristics of gas equipment. The average boiler power for a small private house is 150-200 W, while consumption at start is 2-3 times higher than the nominal parameter.
Stabilization speed. The characteristic reflects the time spent on equalizing the output voltage. A high stabilization speed with a reduction in the response time of the system in case of deviations guarantees protection of the boiler from breakdowns and its stable operation.
Input voltage. Extreme network deviations, up or down, can easily damage the connected equipment. For this reason, for a gas boiler it is recommended to choose a stabilizer with the widest input voltage range.
Output voltage. For working with a gas boiler, a stabilizer with a permissible deviation of ±10% is recommended. There are also more accurate devices that completely eliminate malfunctions and increase the service life of connected equipment.
Other parameters. Modern network stabilizers are equipped with a number of useful options and capabilities. These are, for example, electronic protection against overheating/overload/short circuit/network failures, automatic restart, surge protectors, digital or LED indication. Expanded functionality contributes to the convenience and better performance of the stabilizer.

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.

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.

In what case is it advisable to use a UPS instead of a stabilizer?

In addition to voltage stabilizers, there are also uninterruptible power supplies (UPS), which provide a constant volt value and can provide voltage to boiler equipment. Their difference lies in the presence of batteries that provide backup current even when the power in the house is completely turned off. The duration of power supply depends on the battery capacity, and the latter is directly related to the size of the equipment and cost.

It is not advisable to buy an IPB when there are no long power outages. If in an apartment building or village the voltage sometimes disappears (breaks in the line, drop below 100 V from user loads), the stabilizer will turn off the boiler and wait for the power to be restored. Since the heating has a large temperature reserve, the system will not shrink after 5-6 hours of inactivity, even in the most severe frosts. As soon as the voltage level is restored to the minimum allowable according to the stabilizer’s passport, it will pass it through and the boiler automation will start working again.

But if power outages occur for a long time (the light went out in the evening and appeared only the next day at lunch), and this happens once a month, then you should think about purchasing an UPS. Using batteries, the device will be able to provide power to the boiler and pump, which will prevent the coolant from cooling down.

Its principle of operation is to accumulate energy in batteries while there is voltage in the network, and release current to consumers in the event of a general shutdown. The transition from external voltage to internal voltage occurs instantly, so the equipment continues to work. The disadvantages of the UPS include more complex maintenance, increased housing size, and high cost.

UPS types

Uninterruptible power supplies are structurally divided into two types:

UPS with built-in battery. They have a small reserve due to the low battery capacity. Designed to maintain the functionality of the boiler electronics, and possibly equipment alarms (low-flow networks).

UPS connected to external batteries. This is a more advanced type of equipment that is capable of powering the boiler, pumps, and ensuring the operation of solenoid valves and other actuators. With their help, you can survive long blackouts without any consequences for the indoor microclimate.

UPS architecture type

Equipment with batteries is divided into three types according to their design architecture:

Offline. They operate without a built-in stabilizer, so as soon as the network indicators become unacceptable, they switch to battery operation. If the input current parameters change frequently, the battery will be used regularly and will quickly discharge.
Online. Has an increased number of batteries and produces double current conversion. The battery is constantly recharged, and the boiler receives voltage from the battery, converting 36 V DC to 220 V AC. Optimally suitable for boiler equipment, but expensive.
Linear interactive. At the same time, the battery is recharged and voltage is supplied to the boiler, leveling the indicator to 220 V. It is distinguished by sufficient accuracy of the output voltage and an average price.

Comparison of voltage stabilizers and UPS


	Stabilizer	UPS


In what case is it advisable to use.	During short-term power surges and rare power outages.	With frequent power outages for long periods.
Principle of operation.	Eliminates short-term power surges and stabilizes voltage.	As long as there is electricity, the batteries are charged; during a power outage, the batteries are a source of electricity.
Service.	Simple.	More complicated due to the presence of batteries.
Device size.	The device is compact.	The dimensions of the device are large.
Price.	Lower than UPS.	High.

To summarize, we can highlight the main points: a voltage stabilizer is essential to protect the gas boiler; It is important to calculate its power with a reserve according to the formula, select a speed of 5-10 ms. The protection and restart functions are important. For prolonged power outages, it is better to choose a UPS with online architecture.

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The best three-phase stabilizers for a gas boiler

Stabilizers of this class are used to connect domestic and industrial boilers with a supply voltage of 380 V.

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

Three-phase equipment RESANTA ACH-15000/3-EM (15 kW) is designed to provide high-quality power supply to domestic and industrial gas boilers in conditions of unstable network voltage.

This stabilizer is equipped with an electric motor that regulates the output voltage with high accuracy.

The error is only 2 percent, or 4 V.

A total power of 15 kW allows you to power one or more consumer devices and even small objects in general.

The stabilizer is protected from short circuits, overheating, overvoltage and pulsed network noise.

Specifications:

stabilizer type - electromechanical;
rated power - 15000 W;
input voltage - 140-260 V;
stabilization accuracy - ±2%;
output voltage - 216-224 V;
display of information - digital display;
protection - against short circuit/overheating/overvoltage/interference;
load connection - output terminals;
overall dimensions - 360×840×360 mm;
device weight - 60.2 kg.

Advantages

reliable microprocessor control;
high speed of protection response;
built-in filters against interference;
output voltage stability;
holds overload well.

Flaws

impressive dimensions;
heavy weight;
high price.

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

The three-phase stabilizer RESANTA ACH-9000/3-EM is designed to provide power to gas installations and other equipment with a total electricity consumption of up to 9 kW.

The input voltage range of the unit is 140–260 V (on one phase).

This stabilizer is equipped with an electric motor that allows you to regulate the output voltage with higher accuracy.

The error in this model does not exceed 2 percent.

The device is equipped with a protection unit against short circuit, overheating and overvoltage.

The built-in digital indicator allows you to control the operation of the device.

Specifications:

stabilizer type - electromechanical;
rated power - 9000 W;
input voltage - 140-260 V;
stabilization accuracy - ±2%;
output voltage - 216-224 V;
display of information - digital display;
protection - against short circuit/overheating/overvoltage;
load connection - output terminals;
overall dimensions - 330×770×330 mm;
device weight - 39.1 kg.

Advantages

reliability;
accuracy of work;
no noise;
high power.

Flaws

heavy weight;
heating during operation.

Energy Hybrid 15000/3 II, black

Three-phase voltage stabilizer Energy Hybrid 15000/3 II is an improved model equipped with an advanced voltage regulation control circuit, ideal for powering gas boilers.

The presented device is equipped with a processor control board that ensures stabilization accuracy with an error of no more than 3 percent of the nominal value.

Reliability and long-term operation are guaranteed by the rational layout of internal components and innovative autotransformer winding technology.

The stabilizer has an extended input voltage range from 100 to 260 V.

Specifications:

stabilizer type - hybrid;
rated power - 15000 W;
input voltage - 100-260 V;
stabilization accuracy - ±3%;
output voltage - 213-227 V;
display of information - digital display;
protection - from short circuit, overheating, overvoltage;
load connection - output terminals;
overall dimensions - 230x380x545 mm;
device weight - 46 kg.

Advantages

Ease of use;
informative control panel;
minimum error;
high power.

Flaws

not an affordable price tag;
case heating;
heavy weight.

Basic recommendations for purchasing

You can select a voltage stabilizer for a gas boiler, guided by the instructions for a specific model and the recommended safety regulations. Preference should be given to proven brands, having studied their technical characteristics, all the advantages and disadvantages on the company’s official website. You need to buy a stabilizer from official dealers or representatives of the brand so as not to run into a fake.

Also, you need to learn more about the chosen model by reading customer reviews. The seller of stabilizing electronic devices must have an official website. The main page contains a catalog with a full description and technical characteristics of each model. In the menu you can find popular brands and types of equipment, as well as useful articles that help the buyer decide on the choice of stabilizer. The website must indicate the warranty period of the devices and the degree of safety. Then the purchase will be useful, reliable and guaranteed safe. It’s better to find out everything in detail than to pay money for a “pig in a poke.”

The best inverter single-phase models

The presented stabilizers use the principle of double energy conversion, which eliminates most of the disadvantages inherent in other types of devices.

Calm IS350 (0.3 kW)

Single-phase inverter-type stabilizer Shtil IS350 (0.3 kW) is designed to protect gas boilers and other equipment sensitive to the quality of the mains power supply.

The model has a wall/desktop version, built-in protection against impulse noise, protection against malfunctions and failures.

Quiet operation ensures natural cooling.

The unit has an instant response to changes in input voltage, high stabilization accuracy in the region of 2 percent of the nominal value, and a wide range of input voltages.

LED indicators make it possible to monitor the status and operating modes of the stabilizer.

Specifications:

stabilizer type - inverter;
rated power - 300 W;
input voltage - 90-310 V;
stabilization accuracy - ±2%;
output voltage - 216-224 V;
information display - LED indication;
protection - against short circuit/overheating/overvoltage/interference;
load connection - 1 socket;
overall dimensions - 155x223x80 mm;
device weight - 2 kg.

Advantages

ease of use;
stencil for installation included;
no noise during operation;
high-quality assembly and materials.

Flaws

lack of information board;
non-removable power cord;
inflated price tag.

Shtil IS5000 2021 (4.5 kW), gray

Inverter stabilizer Shtil IS5000 2021 (4.5 kW) is a new generation device with double transformerless energy conversion to protect against high and low input voltage levels of gas boilers and other electrical appliances.

The stabilizer is wall-mounted and convenient for installation in small spaces.

Connection to the network and load is carried out through terminals and an input circuit breaker.

The front panel of the product is equipped with an electronic display with digital readout.

Cooling in this model is forced fan with an intelligent rotation speed control system.

Emergency protection against short circuits, impulse noise, overload and overheating is provided.

Specifications:

stabilizer type - inverter;
rated power - 4500 W;
input voltage - 90-310 V;
stabilization accuracy - ±2%;
output voltage - 216-235 V;
display of information - digital display;
protection - from short circuit, overheating, overvoltage;
load connection - output terminals;
overall dimensions - 246x358x101 mm;
device weight - 6 kg.

Advantages

light weight;
compact dimensions;
quiet operation;
excellent build quality;
decent equipment.

Flaws

high price;
heating under load.

Stil IS550 (0.4 kW), gray

Single-phase inverter device Shtil IS550 (0.4 kW), equipped with LED indicators for monitoring status and operating mode, is designed to power gas boilers, household appliances and refrigeration equipment.

The model is equipped with built-in protection against impulse noise, malfunctions and malfunctions.

The equipment is characterized by a high response speed to changes in input voltage, increased stabilization accuracy, and a wide range of input voltages.

The system is controlled by a high-performance digital microprocessor.

The electronics provide continuous regulation of the output voltage with no unpleasant effects when switching stabilization thresholds.

Specifications:

stabilizer type - inverter;
rated power - 400 W;
input voltage - 90-310 V;
stabilization accuracy - ±2%;
output voltage - 216-224 V;
information display - LED indication;
protection - against short circuit/overheating/overvoltage/interference;
load connection - 1 socket;
overall dimensions - 155x245x82 mm;
device weight - 2 kg.

Advantages

compact unit;
low noise level;
small error;
ease of connection.

Flaws

unreliable power button;
lack of digital display;
only one socket for load.

RESANTA ACH-600/1-I (0.6 kW), gray

The inverter stabilizer RESANTA ACH-600/1-I (0.6 kW) in a universal gray design is compact equipment for protecting gas boilers from voltage surges in the electrical network.

The weight of the presented device is only 4 kg, the device is easy to carry and transport.

The housing protection level corresponds to class IP20.

The presented stabilizer has passive cooling, is equipped with two sockets, and a wall mounting system.

The efficiency of the unit reaches 97 percent. The rated load power is 0.6 kW.

Specifications:

stabilizer type - inverter;
rated power - 600 W;
input voltage - 90-310 V;
stabilization accuracy - ±1%;
output voltage - 218-222 V;
information display - LED indication;
protection - against short circuit/overheating/overvoltage/interference;
load connection - 2 sockets;
overall dimensions - 410×225×125 mm;
device weight - 4 kg.

Advantages

high accuracy;
bright LED indication;
silent natural cooling;
possibility of wall mounting;
two output sockets.

Flaws

high price;
short connection cable;
lack of digital display.

Semiconductor (thyristor and triac) circuits

Devices with semiconductor switches - thyristors and triacs - can be built according to two principles:

Similar to a relay circuit. The only difference is that semiconductor devices are used as a key rather than relay contacts.
Using a transformer at the input and regulating the output voltage by changing the opening angle of thyristors (triacs).

The first circuit is similar in characteristics to the relay circuit, but has higher performance. At the same time, to control semiconductor switches, a more complex circuit is required, and they themselves have a higher cost, lower overload capacity and less time between failures.

In a circuit with an AC voltage regulator, the transformation ratio remains unchanged. The effective voltage value is stabilized by controlling the moment of unlocking the keys. This approach makes it possible to simplify and reduce the cost of the winding unit and the structure as a whole.

However, this method of regulation has its own disadvantages, the main of which is the non-sinusoidal output voltage and the high level of interference induced into the network.

Expert opinion

Grebnev Vadim Savelievich

Heating system installer

Both variants of such schemes require cooling of the switches, the power losses on which are higher than on the relay. This affects the dimensions of the structure.

POWERMAN AVS 500 S – affordable price

Single-phase stabilizer for working with gas boiler equipment with a power of up to 200~300 watts. It is small in size and weight. Made in a wall-mounted version. Equipped with a European output socket. Stabilizes the input parameters of the electric current.

Built-in filters cut off extraneous frequency noise and remove interference. Visual control is carried out on a liquid crystal display. The current state of the structure is reflected by light indicators.

Pros:

Compact, light weight, fulfills its functions.
Peak load and short circuit protection.
Inexpensive, easy to install and connect.

Minuses:

The socket is at the bottom, slightly inconvenient.
For some reason there is no second indicator.

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Energy VOLTRON - 1,000 5% E0101-0154 - power and accuracy

Wall mounted stabilizer. Levels out input distortions of network electricity. It is distinguished by high accuracy and small error coefficient.

Works in tandem with computer and household appliances, heating equipment, control units from the “smart home” series.

It is used in private homes, medical institutions and laboratories, and office premises. Reaction time is less than 10 milliseconds. Works outdoors in any weather.

Pros:

High-quality assembly, beautiful design, precision.
Powerful device, good output parameters, small error.
Small size, LED display.

Minuses:

Only one output socket.

Bastion Teplocom ST-555 – super compact design

Small-sized voltage stabilization device. Levels out differences in input parameters of the electrical network. The model is specially designed to protect the heating system and individual components, including gas boilers. Has a remote socket on a flexible cable.

The stabilizer is designed for use in basement conditions with high humidity. Provides protection against lightning strikes.

Pros:

Super small size, easy to install, lightweight.
Completely fulfills its duties and is quite accurate.
Bright LED indication, replaces the night light at night.

Minuses:

Loud, very good clicks when working.
The output voltage fluctuates and there is instability in operation.

Calm R 800T – high reliability

Wall-mounted single-phase AC voltage stabilizer. Designed to work with heating equipment and heating boilers. Has built-in frequency filters to correct input distortion.

Equipped with LED indication, two European sockets are built-in for connecting to consumers. An electronic protection system and a special algorithm for operating in normal mode and peak loads are used.

Pros:

High-quality assembly, nothing superfluous, good power.
Design, informative display.
Unpretentious, reliable, stable output parameters.

Minuses:

The display is missing.
Possibly high price.

RUCELF BOILER-1200 – protection of boiler units

Single-phase stabilizer for reliable provision of boiler heating equipment with stabilized voltage. It is implemented in a wall-mounted version, which allows you to save space and make more efficient use of the room area.

Levels out voltage surges and eliminates impulse noise. Works over a wide input range. It has a high motor life, the internal components are enclosed in a durable and rigid steel body.

Pros:

Performs basic functions successfully and works in a basement environment.
Powerful – boiler and circulation boiler connected.
Durable, rigid case, small in size, mounted on the wall.

Minuses:

No input fuse.