The issue of energy consumption of large household appliances becomes critical when choosing a Side by Side format model. Large two-door units occupy a significant area and can accommodate huge stocks of products, but their operation requires a constant connection to the power grid around the clock. Many potential owners fear that electricity bills will increase significantly if such a giant appears in the kitchen.
In fact, modern technologies allow these devices to remain quite economical, despite the impressive internal volume. Electricity consumption directly depends on many factors: energy efficiency class, type of compressor, the presence of a No Frost system and even the room temperature. Understanding these processes will help not only choose the optimal model, but also significantly reduce operating costs in the future.
In this article we will analyze in detail what determines refrigerator energy consumptionhow to calculate the approximate amount in the receipt and what nuances of operation can turn an economical model into an energy vampire. You will find out why older models consume more, and new ones, even with an increase in volume, can be more economical.
What determines the electricity consumption in Side by Side refrigerators
The main factor determining how many kilowatt-hours your meter will “wind up” is the energy efficiency class. Models marked A++ or A+++ are designed to minimize heat loss and optimize compressor operation. The difference in consumption between class G (obsolete) and class A+++ can reach a fivefold value with the same volume of chambers.
The second most important aspect is volume cooled space. Side by Side refrigerators usually have a capacity of 500 to 700 liters. Obviously, cooling such a mass of air and products requires more energy than a standard 300 liter two-chamber model. However, modern thermal insulation materials make it possible to keep the cold inside much more effectively than it was 10-15 years ago.
⚠️ Attention: The energy consumption declared by the manufacturer (kW/year) is calculated in laboratory conditions at an ambient temperature of +25°C. In real life, especially in summer or in a hot kitchen, consumption can increase by 15–25%.
Also (cannot be ignored) the impact of additional functions. The presence of a display on the door, a freshness zone with separate cooling, an ice maker and an air circulation system Multi Air Flow increases the load on the network. The more electronics and motors work inside the case, the higher the final figure in kilowatts.
Calculation of annual and monthly energy consumption
To To understand the real burden on the budget, it is necessary to translate technical characteristics into money. On the back wall of any refrigerator or in its passport the value of energy consumption for the year is indicated, for example, 350 kW/year. This is the basic figure from which you should build.
To obtain monthly consumption, divide the annual value by 12. For example, 350 / 12 ≈ 29 kW per month. Next, this figure must be multiplied by the tariff of your region for 1 kW/h. If the tariff is 5 rubles, then maintaining the refrigerator will cost approximately 145 rubles per month.
However, it is worth considering that the actual consumption may differ from the passport one. Below is a table showing approximate consumption depending on the efficiency class for refrigerators with a volume of about 550 liters.
| Energy efficiency class | Approximate consumption (kW/year) | Consumption per month (kW) | Cost per month (tariff 5 rub.) |
|---|---|---|---|
| A+++ | 250 – 300 | 21 – 25 | 105 - 125 rub. |
| A++ | 300 – 400 | 25 – 33 | 125 - 165 rub. |
| A+ | 400 – 500 | 33 – 42 | 165 - 210 rub. |
| A | 500 – 650 | 42 – 54 | 210 - 270 rub. |
As can be seen from calculations, even for a powerful Side by Side unit the costs are not astronomical if the correct efficiency class is selected. Overpayment when purchasing a more economical model often pays off in 3–5 years of operation.
The influence of the type of compressor on energy costs
The heart of any refrigerator is the compressor, and the nature of energy consumption depends on its type. Traditional linear compressors operate on the “on-cool-off” principle. Such cyclic starts create high starting currents, which increases the overall electricity consumption.
Inverter compressors, which are now installed in most models Side by Side premium and mid-segment, work differently. They do not turn off completely, but only reduce the speed to maintain the set temperature. This avoids peak loads on the network and reduces wear on mechanical parts.
The difference in consumption between a linear and inverter motor can be up to 25% in favor of the latter. In addition, inverters are less sensitive to voltage drops in the network, which is important for many regions. When choosing a refrigerator, pay attention to the presence of the word Inverter in the description of the characteristics.
Why is the inverter quieter?
The inverter compressor does not make loud clicks when starting and stopping, since it works constantly, but at low speeds. This makes its operation almost silent compared to its linear counterpart.
How operating conditions change consumption
Even the most economical refrigerator can become “gluttonous” if its operating conditions are violated. Ambient temperature plays a key role. If the unit is located near a radiator, stove, or in direct sunlight, the thermostat will command cooling much more often.
The frequency of door openings also affects the energy balance. In Side by Side refrigerators, one of the doors (freezer) is often narrower, but high. With each opening, cold air, which is heavier than warm air, flows out, and warm air comes in. The compressor has to re-cool this volume.
- 🔥 Installation near (heat sources) increases consumption by up to 30%.
- 🚪 Frequent and prolonged opening of doors disrupts the temperature regime.
- ❄️ Clogged ventilation holes inside the chambers prevent circulation air.
It is also important to monitor the condition of the sealing rubber bands. If they do not fit tightly, the cold will disappear constantly, forcing the engine to work without stopping. You can check the tightness using a sheet of paper: clamp it with the door and try to pull it out - it should come out with force.
⚠️ Attention: Do not put hot foods in the refrigerator. Cooling a pot of soup will take as much energy as operating the unit for several hours in normal mode.
Comparison of Side by Side with conventional refrigerators
The question often arises: how much more power-hungry is Side by Side than a regular two-chamber refrigerator? The answer lies in the physics of volume. If a standard refrigerator has a volume of 300–350 liters, then Side by Side is 500–600 liters or more. It is logical that a larger space needs to be cooled.
However, thanks to improved wall insulation (they are often thinner, but hold the cold more efficiently) and modern compressors, the difference in consumption is not proportional to the difference in volume. A modern Side by Side class A++ can consume only 20–30% more than an old two-compartment refrigerator of the same class, while holding twice as much food.
In addition, Side by Side models often feature a zone cooling system. This means that cold air is distributed more evenly, and the compressor does not have to work hard to cool the far corner of the chamber. In conventional refrigerators with static cooling (Direct Cool), this process is less efficient.
Practical tips for reducing energy consumption
There are a number of actions that will help minimize electricity consumption without compromising comfort. First of all, this is the correct installation. Provide a gap between the back of the refrigerator and the wall of at least 5–7 cm for normal air circulation around the condenser.
Secondly, control the temperature inside the chambers. For the refrigerator compartment, the optimal value is +4...+5°C, and for the freezer compartment -18°C. Reducing the temperature in the freezer to -24°C or lower has no practical meaning for storing food, but will significantly increase energy consumption.
Regular defrosting (if the model is not completely No Frost) and cleaning the condenser on the rear panel from dust is also required. A layer of dust 1 mm thick can increase energy consumption by 10%.
☑️ Energy saving checklist
Frequently asked questions (FAQ)
Is it true that a Side by Side refrigerator does not fit into a standard doorway?
The standard width of a doorway in most apartments is 80 cm. The width of Side by Side refrigerators usually varies from 90 to 92 cm. However, many models provide the ability to remove the doors or reinstall them, which allows you to bring the body through the opening. Also, some manufacturers make doors that are narrower than standard. Before purchasing, be sure to measure the opening and check with the seller for the dimensions without doors.
Does Side by Side need a separate outlet?
Using an extension cord or tee to connect such a powerful unit is not recommended. It is advisable to have a separate outlet with grounding. If this is not possible, make sure that the wiring can withstand the load, especially if there are other powerful devices connected to the same outlet. Voltage surges can damage the electronic control unit.
How often do you need to defrost a No Frost refrigerator?
The No Frost (or Full No Frost) system automatically removes moisture from the chambers, preventing the formation of ice. Technically, such refrigerators do not require defrosting. However, manufacturers recommend turning off the device at least once a year, washing it and letting it rest so that the lubricant in the compressor acquires the desired consistency and odors go away.
Does Side by Side make a loud noise compared to a conventional refrigerator?
The noise level depends not on the format, but on the type of compressor and build quality. Models with inverter compressors operate very quietly (up to 36–38 dB). However, due to the large volume of the cabinet and the air circulation system, noise may travel differently. Before purchasing, read reviews about a specific model, since this parameter differs greatly between different brands.