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The reason why electricity bills are consistently high in some households is primarily due to passive behavior and the inability to manage electrical appliances such as air conditioners, washing machines, and refrigerators effectively. In this article, Mytour shares methods for calculating electricity consumption on electrical appliances to help you estimate the energy costs of existing or upcoming devices and devise strategies to save electricity for your household.
Power Rating of Electrical Devices on Labels
Currently, most refrigeration and household electrical appliances display the operating power on the product label, along with specifications such as power consumption, serial number, origin, etc. Through these specifications, you can determine the monthly electricity consumption. The power rating of the device is usually listed on the packaging or energy label.
Formula for Calculating Electrical Energy Consumption: A = P x t
Where
A - Amount of electricity consumed over time t
P - Power consumption (in kW)
t: Time (unit: hours)
The power rating of refrigeration devices is indicated on the packaging label
Electricity Consumption Levels of Some Common Electrical Appliances in Households
Refrigerator: A refrigerator has a power rating of 120W (0.12KW). Over 1 day (operating for 24 hours), it consumes about 2.88 KWh (0.12KW x 24h) of electricity.
Air conditioner: An air conditioner with a power rating of 1,200W consumes approximately 1.2 KWh after 1 hour of use.
Air conditioner: Air conditioners have power ratings ranging from 800 to 850W; 12,000 BTU units have a power rating of 1,500W. Therefore, a 9,000 BTU air conditioner consumes around 0.85KWh (almost 1 unit of electricity) when used for 1 hour; a 12,000 BTU air conditioner consumes 1.5 units of electricity after 1 hour of use.
In reality, power consumption may be lower because not all electrical appliances operate at maximum power all the time. Especially with electrical appliances equipped with Inverter compressors capable of saving electricity, power consumption will be lower.
Furthermore, if the energy label of the product mentions electricity consumption, it can also be used to calculate the approximate amount of electricity the device consumes in 1 day; simply divide the energy consumption in 1 year by 365 days to obtain the amount of electricity the device consumes in 1 day.
The annual electricity consumption displayed on the energy label of refrigerators
For instance, if the energy label states 'Power consumption': 403kWh/year, then on average, the refrigerator will consume about: ~403kWh/365 days = 1.104 kWh/day, and in a month it would be 1.104×30=33.12 kWh.
You can check the latest electricity price list here to calculate your electricity cost!
However, this is just a reference number as it also depends on usage habits, frequency of refrigerator door opening, and external conditions such as hot weather causing refrigerators and air conditioners to work harder.
Some ways to choose energy-saving appliances
According to regulations of the Ministry of Industry and Trade, electrical appliances are required to have energy labels before being sold on the market. Energy labels provide information on the energy consumption of the appliances to help consumers make smart and energy-efficient choices.
In Vietnam, there are 3 types of energy labels placed on electrical appliances: confirmation energy label, comparative energy label, and energy label without stars.
- Confirmation energy label (Vietnam Energy Star label): is a triangle-shaped label, with the energy-saving symbol attached to appliances that meet or exceed high energy performance levels set by the Ministry of Industry and Trade (also known as HEPS).
Confirmation energy label
- Comparative energy label: is in rectangular shape, with 5 stars on the label corresponding to different energy performance levels. These are the declared energy consumption figures of electrical appliances, depending on the electricity consumption efficiency of each appliance, the Ministry of Industry and Trade will stipulate whether the appliance should be labeled with 1 star, 2 stars... or 5 stars. A 5-star label is for the most energy-efficient products when compared to products of the same type, capacity, and function.
Comparative energy label
- Energy label without stars is often used for products with energy efficiency below the minimum level.
When choosing refrigeration appliances, consider selecting the appropriate power capacity based on your needs and the number of users.
Additionally, opt for appliances with modern technologies such as Inverter technology, Plasmaster technology, etc.
Above is an article sharing tips on 'How to calculate the amount of electricity consumption on refrigeration appliances'. Hopefully, with the information shared by Mytour Supermarket, you can calculate the amount of electricity consumed per month to devise a reasonable plan for using energy-efficient appliances!
