How to competently choose an inverter for a heating boiler

The comfort and energy efficiency of your home can be greatly impacted by selecting the appropriate inverter for your heating boiler. Choosing the best option might be intimidating at first because there are so many options on the market. To make sure you choose an inverter that suits your needs, you can streamline the decision-making process by being aware of a few important factors.

First and foremost, it’s critical to comprehend the functions of an inverter and their significance for your heating system. In essence, an inverter is a device that changes electricity from direct current (DC) to alternating current (AC). When it comes to a heating boiler, the inverter regulates the compressor motor’s speed, enabling the system to modify its output in accordance with your home’s heating needs. As a result, temperature control is more accurate and energy efficiency is raised.

One of the most important things to think about when selecting an inverter for your heating boiler is its size or capacity. Your home’s heating needs should be met by the inverter’s capacity, which should take into account your living space’s size, insulation levels, and climate. Selecting an inverter with the appropriate capacity guarantees best results and energy conservation.

The inverter’s efficiency is another crucial factor to take into account. Selecting models with high efficiency ratings can eventually result in lower energy consumption and utility bills. Consider how well the inverter works with your current heating system as well. To prevent compatibility problems, make sure it is compatible with the voltage and power requirements of your boiler.

When choosing an inverter for your heating boiler, it’s also a good idea to take the manufacturer’s reputation and dependability into account. Select well-known brands that have a history of creating dependable and long-lasting goods. Making an educated selection can also be aided by reading reviews and getting advice from experts or other homeowners.

To sum up, selecting the ideal inverter for your heating boiler is essential to maximizing performance, comfort, and energy efficiency. By taking into account variables like capacity, efficiency, compatibility, and manufacturer reputation, you can choose an inverter with confidence that satisfies your unique needs and helps create a more sustainable and comfortable home environment.

Consider the power requirement of your boiler Check the compatibility with your heating system
Look for energy efficiency ratings Ensure adequate safety features

What are and what inverters are for the heating boiler for

An inverter is a device that converts direct current into alternating current while altering the voltage. It has an internal or external battery that can run at 12, 24, or 48 volts. It produces an output voltage of 220 volts, which is similar to a typical single-phase home power supply. The frequency of 50 Hz, which is necessary for the operation of energy-dependent boilers, is likewise produced by modern inverters for heating boilers.

Even though the equipment is optional, people frequently undervalue its significance. Why an inverter isrequired is

  • in automatic mode, without interruption in work, provide normal power to any energy -dependent boiler in case of interruption in power supply;
  • restore the normal voltage of 220 V in the event of a voltage drop in the network below the critical mark necessary for the boiler;
  • prevent the freezing of the heating system and its damage due to disconnecting the boiler (if antifreeze is not used as a coolant);
  • Prevent failure of the boiler components due to a jump or voltage drop, most often it is an electronic control board (automation). Dear boilers with complex automation are especially vulnerable to such as Viessmann, Vaillant, Lamborgini, Ferroli, but this also applies to Russian -made boilers, for example, energy -dependent Lemax models . In this case, the inverter will turn off the external power from the mains and will provide normal electric current characteristics for a certain time.

Many manufacturers now include extra modules—such as a charger, controller, etc.—with their modern inverter models. This confuses people and eliminates many of the distinctions from the UPS (sources of continuous nutrition with broader functionality). Although a tension converter is only one component of an uninterrupted power source in its classic form, modern inverters can have even more functionality than UPSs, depending on the model.

Because of this, choosing between devices can be confusing. We advise you to always compare the differences between devices in general, but also the features and price of a particular converter model to those of a particular uninterrupted power source model.

However, the most important thing to remember is that a basic inverter can last up to four hours, or more, on electricity compared to a basic UPS, which can only last for twenty to thirty minutes. However, even with the cost of a battery purchase included, the cost of a budget converter is typically two times less than that of a budget uninterruptible.

Device and principle of operation

The inverter functions on a very basic principle when used as a standalone component. By connecting a direct current (battery), it is necessary to first connect the source with one polarity, then turn it off and connect it with the back polarity to ensure the power of the consumer (boiler). Therefore, a 50 Hz frequency requirement requires the creation of an algorithm that switches 50 times per second, which is what modern inverters do.

An electronic board with a number of transistors or tristors running in key mode is used to perform switching functions. With such work, converters with a capacity greater than 300 watts separate a significant amount of thermal energy, which is why they also have a cooling system.

Examine the inverter’s operating principle using the above schematic image as an example. The left UA represents the battery. using terminals 1-2, and terminals 3–4 on the boiler RHLH1 active–inductive nature. I Klemi boiler 3-4 is currently connected to terminals 1-2 UA. In this instance, the current is going from UA to LHRH1. The subsequent point II terminals 3–4 shift, and the current’s direction shifts in the opposite direction with respect to the boiler, which is the energy consumer.

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Choosing the right inverter for your heating boiler is crucial for efficient and cost-effective heating in your home. An inverter regulates the power supply to the boiler, ensuring it operates at the optimal level to meet your heating needs while saving energy. When selecting an inverter, consider factors like the size and power requirements of your boiler, the type of heating system you have, and any specific features you need, such as remote control or energy monitoring capabilities. It"s also important to ensure compatibility between the inverter and your boiler to avoid any potential compatibility issues. By taking these factors into account, you can make a smart choice that will keep your home warm and comfortable while reducing your energy bills.

Simple and available about types of voltage converters

The primary factor that must be decided upon initially when making a decision is the type of inverter. Every species has distinct qualities, traits, and an algorithm of labor.


Another name for offline inverters is backups, and their design and algorithm are the simplest:

  1. With normal voltage in the mains, the inverter is inactive, and the boiler works as usual, exclusively from the mains.
  2. As soon as the voltage in the electric network decreases below the critical mark (usually 175-190 V) or disappears altogether, the inverter instantly switches the boiler power to the battery connected to the converter. Switching occurs imperceptibly, in modern models for 4-8 ms, which is enough for the uninterrupted operation of the boiler unit.
  3. As soon as the voltage in the electrical network is restored, the inverter switches the power to the main network and goes into waiting mode.

The majority of devices are built to withstand voltages greater than 260–300 V, which is typically the case. The simplest and least expensive inverters are offline models, which start at 4,000 rubles.

If there are frequent or excessive voltage jumps in the mains, it is advisable to avoid using them. Because of this instability, the converter frequently flips between the primary and backup power sources, rapidly depleting the batteries.

Line -intractive

The best and most versatile voltage converters for a contemporary heating boiler are line-interactive (also known as line-intractive) converters. In line-interactive models, a voltage stabilizer is utilized in addition to the converter and switching relay, just like in offline devices.

The boiler still draws power from the main network when operating in standard mode, but the voltage is adjusted by an integrated stabilizer, and some more advanced models have extra filters to reduce network noise, etc. Because of this work, batteries are less common and electricity use is much more efficient.

In line-interactive models, the boiler’s autonomy can be extended to several days by connecting external additional batteries, although the boiler’s built-in battery typically lasts for 20 to 120 minutes.

For every type of boiler, whether gas, solid fuel, or low-power electric, a line-intractive inverter is always sufficient. These devices do, however, have some drawbacks, including poor sinusoidal smoothing with interference and uniformity violations with deep drawings or differences (switching times of 4-6 ms do not protect too sensitive modules).

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The priciest and most advanced double transformation inverters. This is how a simplified work algorithm appears:

  1. At the entrance, the inverter converts the alternating voltage of the electric network into a permanent, size of 12 V.
  2. At the output, the inverter converts 12 V into 220 V with a perfectly clean sinusoid frequency of 50 Hz.

In a device like this, the batteries serve as the buffer capacity required to match the current parameters. The benefit of the technology is that the boiler receives the flawless, clean sinusoid produced by the inverter without having to make direct contact with the electric grid. Nevertheless, the efficiency of such equipment is lower, up to 90%, because of the double transformation.

How to choose an inverter for a heating boiler

After deciding on the viewpoint, the converter’s parameters must be selected, and whether or not extra capabilities are required must also be determined.

The selection criterion Optimal parameters Description
1. The minimum necessary power 300-600 watts (from 3 kW for electric boats) The maximum boiler power consumption is always indicated in its passport. For example, for gas boilers, this is an average of 130-140 watts. Large of all electricity is used for ignition, at this moment consumption can grow by another 100 watts from above maximum. We also recommend laying 25-30% of the power reserve. Total, for a gas boiler you need an inverter with a capacity of 300, it is better – 600 watts.
2. The input voltage range From 180-190 to 250-260 in The input voltage range determines critical values, when the converter is reached, the power supply will switch to batteries. Accordingly, the fewer deviations from 220 V, the safer such parameters for the boiler work.
3. Amplite of distortion of sinusoids and output voltage Frequency: 50 Hz +- 0.5-1%

Protection against voltage surgery

Lightning safety

It’s also important to take note of the integrated battery and the quantity of external power source connections available. Certain inverters can be used to connect solar panels that have a 12 or 24 V voltage.

Best famous manufacturers and models: characteristics and prices

Cyberpower SMP550EI

One of the most popular, reputable, and well-known manufacturers. One of the best models in terms of price-quality ratio is the SMP550EI, which is a backup inverter with ideal heating boiler parameters and the bare minimum of protection. There is an integrated battery and an external connection option. Reviews from customers claim that it operates almost silently. Its design is also quite pleasing.


Russian-made linear-interactive model that offers optimal parameters and a wide range of functionality at a very low cost. The integrated stabilizer suggests a close, if imperfect, analogy with online sinus models. comes with a charging cable. varies when there are numerous protective measures in place, such as those against overload, short circuit, overvoltage, low voltage, excessive heating, etc. Versions with capacities of 300, 600, 800, and 1000 watts are available.

Cost: 6,100–6,500 rubles.

Powerman Online 1000

One of the best inverters for the heating boiler is an online voltage converter. The output voltage always has a pure sinusoidal form, regardless of the mains’ parameters. Two 9 ah built-in batteries are present. Additionally, it has a very wide operating voltage range of 115-295 V, making it ideal for situations where a private residence is situated across the nation with an unreliable, weak substation that is frequently overloaded.

The only negative aspects are that there are no models with a capacity of less than 900 watts and the noise level is quite high (approximately 45 dB). However, even an inverter with such power is relatively cheap compared to an online species.

SibKontakt ID2-12-300

Russian-made offline inverter, inexpensive, straightforward, and tested. differs in favorable parameters and the potential for temporary double forcing caused by the power applied to the load. This suggests that a device that uses more power than it is supposed to be able to be connected to the device power. T.e. – the perfect feature for boilers that use, on average, 100 watts more than the face value when turned on; any heating system with a single pump can use even the most affordable VT model.

Additionally, there are numerous built-in safeguards for this quantity, including protection against overload, short circuit, overheating, rising voltage, and total battery discharge.

The comfort and energy efficiency of your home can be greatly affected by selecting the appropriate inverter for your heating boiler. With so many options on the market, it’s critical to comprehend the features that different inverters offer as well as your unique heating requirements.

First and foremost, take your heating system’s power requirements into account. Make sure the inverter you select is capable of supporting your boiler’s electrical load without causing any problems. Inverters that are either too large or too small may cause inefficiencies and future issues.

Additionally, take note of the efficiency ratings of the inverter. An inverter with a higher efficiency rating will be able to convert DC power from your batteries or solar panels into AC power more successfully, which will lower energy losses and eventually result in lower electricity bills for you.

A reliable and durable inverter is an important consideration when evaluating them. Seek out respectable companies that have a history of producing dependable goods. A high-quality inverter may be more expensive up front, but it can give you peace of mind that your heating system will continue to function properly for many years to come.

Additionally, think about how well the inverter works with your current heating system. Make sure it works in unison with your boiler and any additional heating system parts. It is essential to select an inverter that is compatible with your particular setup to avoid any problems during installation or operation.

Lastly, don’t be afraid to consult with authorities in the field or ask professionals for advice. They can offer insightful information and support you in reaching a decision that is well-suited to your particular needs and situation. You can choose an inverter that is suitable for your heating boiler with confidence and have a comfortable and energy-efficient home by carefully weighing factors like power requirements, efficiency, reliability, compatibility, and professional advice.

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