When choosing modern household appliances in the kitchen, one of the first questions that arises is buyer, the question arises about electricity consumption. Power of a two-chamber refrigerator is not just a number in technical documentation, but a real indicator that directly affects monthly utility bills. Many users mistakenly believe that the larger the volume of the chambers, the more energy the unit “eats,” however, modern technologies allow even large models to remain within the high energy efficiency class.
It is important to understand that power usually means two different parameters: the nominal (consumed) power of the compressor in operating mode and the peak power at the time the engine starts. The total amount in the receipt depends on their ratio and duration of work. In this article, we will look in detail at what the consumption depends on, how to calculate the costs for your model and what parameters you should pay attention to when buying a new device.
It is worth noting that aging equipment inevitably leads to an increase in energy consumption. If your refrigerator is more than 10 years old, its actual power may exceed that declared in the passport by 20-30% due to wear of the seals and compressor. Therefore, the calculations given below are relevant primarily for working devices.
Nominal and peak power: what is the difference?
To correctly assess the load on the electrical network, it is necessary to distinguish between two types of power. Rated power is the average value that the refrigerator consumes in normal operation, when the compressor has already entered the operating cycle and maintains set temperature. It is this indicator that is usually indicated in watts (W) on an information sticker or in the instructions.
In contrast, starting (peak) power is a short-term jump in consumption that occurs when the compressor is turned on. At this point, significantly more energy is required to start the engine and begin circulating the refrigerant. The peak value can be 3-5 times higher than the nominal value, but it lasts only a few seconds.
- ⚡ The rated power of two-chamber models most often varies in the range from 100 to 250 W.
- 🚀 Peak power at startup can reach 800-1200 W, which is important to consider when connecting through stabilizers.
- 📉 Modern inverter compressors are devoid of sudden starting surges, since they operate in continuous mode with changes in speed.
It is the starting currents that create the greatest load on the wiring. If you plan to connect the refrigerator via a UPS or generator, you need to select them with a margin, taking into account the peak values. For a regular outlet, this is not critical, since the jump is too short to cause heating of the contacts.
Energy efficiency classes and their impact on consumption
Since 2021, a new scale has been in effect in Russia and the EAEU countries energy efficiency, which replaced the old designations with many advantages. Now class Ais considered the most economical, followed by B, C, D and so on. Models marked A++ or A+++ according to the old system now correspond to classes F or G in the new one, which often confuses buyers.
Double-chamber refrigerators of the new model with class A or B consume significantly less electricity thanks to improved thermal insulation and efficient compressors. The difference in consumption between the class A and, for example, Dcan reach 40-50% with the same volume of chambers.
⚠️ Attention: When purchasing, pay attention to the production date. Refrigerators manufactured before 2021 may be rated A+++ on the old scale, which is effectively the new Class C or D. Always check the stated annual kWh consumption.
In addition, the type of refrigerant and evaporator design will affect efficiency. Systems No Frost require more energy to operate fans and defrost heating elements, but provide a more stable temperature, which in the long run can be more beneficial than the constant on-off cycles of old drip systems.