When purchasing an electrical appliance for domestic use, the first thing that we look at is its star rating.
The star rating is based on a scale from 1-5. These stickers would indicate the star rating on the devices. These ratings indicate the appliance’s energy efficiency.
The star rating label can be used to determine how much power the machine uses in a year. The 5-star appliances are the most efficient and use the least power of all star-rated appliances in their niche.
Before we discuss the star ratings in 2021, let’s first understand the concept.
Bureau of Energy Efficiency – BEE
The Indian government agency, Bureau of Energy Efficiency (BEE), issues star ratings to electronic and electrical appliances based on their energy efficiency. BEE has issued star ratings to 26 types of machines, including domestic, industrial, commercial, and office equipment.
The following are the domestic electrical/electronic household appliances we use every day. Each appliance has a different rating.
- Air conditioners for rooms – split and window ACs, as well as inverter ACs
- Refrigerators – Direct cool, frost-free refrigerators
- Color TV
- Electric geysers and solar water heaters
- Ceiling fans
- LPG Stoves
- Washing machine
- Microwave oven
- Solid State Inverter
- Computers, laptops, and notebooks
- LED lamps, including fluorescent tubes lamps
BEE Star Ratings for Air-Conditioners
People are most concerned about the BEE ratings of air conditioners, which consume the highest power.
It is important to be familiar with concepts such as EER and ISEER before we get into the BEE star ratings. The EER and ISEER determine the star rating of the appliance.
Energy Efficiency Ratio – EER
EER is usually calculated for fixed-speed compressor ACs. EER refers to the ratio of AC heat removal in an hour and power consumption over the time period.
The EER can be affected by many factors, as the room temperature may not always be the same.
BEE calculates EER for a given temperature and humidity. For calculation purposes, it sets the outdoor temperature to 35°C and the indoor temperature to 27°C. The humidity is set at 50%.
Indian Seasonal Energy Efficiency Ratio – ISEER
The EER is an all-inclusive ratio that takes into account specific indoor and outdoor temperatures. The weather can change from one place to another throughout the year.
EER calculations are not accurate for ACs that use variable speed compressors (also known as inverter or inverter compressors). BEE created a new concept called ISEER (Indian Seasonal Energy Efficiency Ratio).
Two additional concepts are required to calculate ISEER.
Cooling Seasonal Total Liability (CSTL)
It is the amount of heat that has been removed from the room by the cooling equipment in active mode.
Cooling Seasonal Energy consumption is the energy used by an air conditioner to cool in active mode.
ISEER refers to the ratio of CSTL and CSEC. The calculation can be seen to be almost identical, however, ISEER takes into account seasonal temperature changes as well as variable energy consumption from inverter ACs.
Rating BEE Star
BEE has established star ratings for air conditioners that last for two years. BEE has released the latest star ratings for air conditioners from January 1, 2018, to December 31, 2023.
Refrigerators rated by BEE stars
The BEE Star Rating calculation formula for refrigerators differs from air conditioners. There are also separate calculations for Direct Cool and Frost-free refrigerators.
These star-level parameters determine the star level of frost-free refrigerators.
- Constant Multiplier K (Kilowatthour/liter/year).
- Constant Fixed Allowance C (Kilowatthour/year)
- Volume Adjusted – V
- CEC – Comparative Energy Consumption
The year of manufacture/import/sale determines the constant multiplier or constantly fixed allowance.
Comparative Energy Consumption = C*V + K
Below is the Frost-Free refrigerator star rating, valid January 1, 2020, to December 31, 2021
Direct Cool Refrigerators
CEC can be calculated the same way, but the constant multiplier is different and the constant fixed allowance values are not the same as for frost-free refrigerators.
Below is the star rating of Direct Cool refrigerators between January 1, 2020, and December 31, 2021.
Ratings of Color Televisions by BEE
According to BEE guidelines, color televisions that have native resolutions of up to FHD (1920x1080p), must meet the applicable compliance standards and standby power consumption requirements.
These are the standby power requirements of different color television models.
The maximum star rating will be five stars. Televisions are rated one through five based on their annual energy consumption (AEC).
This formula calculates the Annual Energy Consumption.
AEC = [(6x Pa) + (12x PS)] x 0.365 Kilowatts/annum
Pa = Mode power consumption in Watts, assuming a daily use pattern of six hours
Ps = Standby Mode power consumption, in watts, on a daily usage pattern for twelve hours
The Star rating for color televisions is based on the Annual Energy Use. This can be calculated by replacing the screen size in square cms (A) with the equations depending on the year of manufacture/purchase/sale.
Current BEE star ratings are valid until December 31, 2021. The ratings are for LCD TVs with LED backlighting that exceed FHD resolution (1920x1080p) since there is no CRT/Plasma/LCD equipped with CCFL backlighting TVs.
These star ratings are valid from January 1, 2019, through December 31, 2021.
The TV screen size in square cms is A.
BEE Star Ratings Electric geysers and solar water heaters
BEE states that electric storage heaters with a maximum capacity of 200 liters should comply with star ratings.
These geysers include closed hot water heaters and cistern-fed water heaters.
The Standing Loss (Kilowatts/24 hours/45 degrees Celsius) is the basis for star ratings of geysers. It is the energy consumed by a water heater when it reaches a steady state after being connected to an electric supply.
The electric storage water heater’s label will display the star rating. It indicates the degree of standing loss. This rating can be based on a grade from one to five. It is valid between January 1, 2019, and June 30, 2021.
These ratings show that the storage water heater with the lowest standing loss is the most efficient.
Solar Water Heaters
Solar water heaters have a different star rating system depending on their efficiency. The system efficiency can also be described as the rate at which the water in the storage tanks’ energy content changes. The following formula is used to calculate it.
Rate of change in energy content of water in storage tank = (Rate of useful energy supplied to water in the tank by the solar collector)- (Rate of energy lost from storage tank water to ambient air).
This complicated calculation can be used to calculate the star ratings. The test conditions are as follows.
- Average Storage Temperature = 50° Celsius
- 25°C is the average ambient air temperature
- Average solar radiation incident on the solar collector plan = 700 W/square meter
These are the star ratings.
Ceiling fans rated with BEE stars
BEE Star rating ceiling fans include all sizes from 900mm sweeps to 1500mm (35 ins to 60 ins). BEE standards require that the rated quantities for air delivery and service values not fall below the minimum values.
These are the BEE star ratings, which are valid from September 1, 2019, to June 30, 20,22.
For a rating of 1 star, the minimum service values for fans with sweep sizes 1400mm or 1500mm are 4.1/4.3. Other values are the same.
BEE Star Ratings LPG Stoves
BEE star ratings LPG stoves are based on their thermal efficiency. All domestic LPG stoves must comply with the following star labels, regardless of their size.
BEE Star Ratings Washing Machine
BEE Star ratings should be applied to washing machines that are intended for domestic use in India. Star ratings are based on the ‘per-cycle energy consumed per kg (Kilowatthour/cycle/kg). These parameters are taken into account.
- Perform washing
- Rinse performance
- Energy consumption
- Water consumption
- Performance of water extraction
These are the standard conditions.
- Standard Cotton 30-degrees Celsius Program for top-loading and semi-automatic washing machines with or without an inbuilt heater
- Standard Cotton 60 degrees Celsius Program for Front-loaders with or without an inbuilt heater
These are the BEE star ratings for various types of washing machines, effective March 8, 2019, through December 31, 2020.
BEE Star Ratings Microwave Oven
All microwave ovens used for domestic purposes, including combination microwaves, must comply with BEE star ratings. These are the parameters that go into star ratings.
- Microwave function efficiency
- Energy consumption
- Standby mode: Power consumption
Ratings are calculated based on energy consumption per cooking cycle (Watt-hour/cooking cycle). The minimum qualifications standards as per IEC standards are the following.
- Microwave function efficiency >=54%
- Standby mode power consumption = 0.6W
These star ratings are valid from March 1, 2019, through December 31, 2020.
BEE Star Ratings Solid State Inverter
An inverter is essential for every Indian home. Power cuts are common in India. BEE Star ratings are also available for home inverters powered by 12V DC storage batteries that have an output rating of 250VA up to 2000VA.
BEE is looking into solid-state inverters which can be powered by 24V DC storage cells. The star ratings currently only apply to the 12V range.
Star ratings are based upon the DC to AC efficiency of inverters while delivering the rated output at a load of power factor of 0.8. These ratings are available.
BEE Star Ratings Computers: Notebooks and Laptops
BEE Star ratings are only applicable to desktop computers, notebooks, and laptops. This does not apply to gaming consoles, Ereaders, gaming consoles, and handheld gaming devices. It also doesn’t apply to personal digital assistant devices and POS products that don’t use internal components such as processors, memory, and motherboard.
It does not include handheld computers and small-scale servers.
Computers don’t have star ratings between 1 and 5, like all household appliances. An Energy Star label is available on computers that are energy-efficient.
BEE Star Ratings of LED lamps, including tubular fluorescent lamps
All LED lamps, including tubular fluorescent light bulbs, must also comply with the BEE Star ratings. Star ratings are based upon the Luminous Efficacy (Lumen/Watt).
The star ratings of LED lamps are valid for the period July 1, 2020, to June 30, 2023.
The rating of fluorescent tubular lamps is valid from July 1, 2018, to June 30, 20,23
We’ve discussed all electrical/electronic home appliances that comply with BEE star ratings. BEE star ratings are not only for domestic appliances. They also apply to machines that are suitable for commercial, industrial, or official use.
You should have no trouble selecting the right appliance for your home after reviewing the ratings. These are some questions that you might be asking. We will try to answer and clarify them.
Why is it important to check for BEE star labeling when buying appliances?
You can see the star ratings of each appliance in the star rating list. The BEE rating ranges from 1-5, with the 5-star rating representing the most efficient.
You know how much power an AC or water heater will use when it is in use. An AC can consume as much as 1.5 units an hour. A 5-star AC can reduce consumption by as much as 0.5 units per hour if it is rated 5 stars. Refrigerators and water heaters, too, are power-guzzling appliances.
It is always a good idea to invest in an energy-efficient machine.
Are 5-star appliances more expensive than lower-rated ones?
A 5-star appliance of any type/model in any category/model will be more expensive than a 3-star, 4-star or 4-star model within its niche. The 5-star model uses less power than the 3-star or 4-star models.
You can save money over time by reducing your energy consumption. Even though it may be more expensive at first, it is a good idea to choose a 5-star model.
Is each piece of equipment tested by BEE before it gives them a rating?
BEE doesn’t test every model before rating it. BEE must receive the necessary information from the manufacturers to be able to rate these appliances. Manufacturers are responsible for their reputation. They do not stand to gain anything from misrepresenting data.
BEE is able to test any model or equipment at any time if it discovers that its performance is not in line with industrial specifications. BEE can receive complaints from customers about poor performance. BEE can suspend ratings if the information is accurate. This will force the manufacturer to take the product off the market.
Are manufacturers required to test each model’s energy efficiency?
Every model is subject to quality control before it leaves the factory. They test each model before they put them on the market.
Is the star rating accurate in all situations?
The reason star ratings are accurate is that appliances are tested under ideal conditions. You may experience different conditions at home. You may have a different usage pattern. The star label’s energy usage doesn’t have to be exact at all times. The figures should be equal on average.
Important things to be aware of when buying an appliance that is rated BEE Star Rating
It is important to understand that star ratings do not indicate an appliance’s energy efficiency. When you buy an instrument, other critical factors are also important.
The date of the rating
Every BEE Star label includes the year it was rated. BEE is constantly updating its rating system. An AC model could have been a 5-star appliance in 2019.
It might still be a 3-star or 4-star machine today, depending on the new star ratings. It is always recommended to buy appliances with the most recent rating possible.
A BEE Star label is not required for all appliances.
BEE star ratings for appliances are not required. BEE star ratings are not mandatory for all appliances.
Induction stoves, however, have higher BEE star ratings than LPG gas stoves. The 4K TVs are the only color TVs that do not have a star rating.
Different rating standards can be applied to sub-categories of appliances.
Take a look at the washing machine. The ratings for top-loading and semi-automatic machines are the same, while front-loaders have a different rating.
Window ACs also have different star ratings than split ACs. A 5-star window AC may consume more power than an AC with a 3-star split AC.
It is important to calculate the Return on Investment.
An AC 5-star model will cost more than an AC 3-star in the same market. The 5-star model is more economical and saves more energy over time. The return on investment of any appliance purchased based on its star rating is crucial.
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