Evie Summers
When a TV is in sleep mode, it consumes a small amount of power, known as 'standby power'. The amount of power used varies depending on the TV's age, model, size, and configuration. Older TVs tend to be less energy-efficient, with newer LCD and LED models being designed with energy efficiency in mind. The average smart TV in standby mode consumes around 12.5 watts, but this can range from as low as 0.2 watts to as high as 20 watts. While leaving a TV in sleep mode may not significantly increase your electricity bill, it can add up over time. To save energy, it is recommended to fully power off the TV when not in use, either manually or by using the sleep timer feature.
| Characteristics | Values |
|---|---|
| Power consumption when in sleep mode | A few watts up to 20 watts |
| Power consumption when in active use | 60 watts |
| Average smart TV standby power draw | 14 watts |
| Power consumption of modern flat-screen 32-inch TV when left on for 12 hours | 28W to 57W |
| Average TV wattage per year | 620,000 watt-hours |
| Energy consumption of older CRT TVs in standby mode | 1.5 watts |
| Energy consumption of modern LCD TVs in standby mode | Less than one watt |
| Energy consumption of TVs with smart wake features enabled | 12.5 watts |
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Standby mode
Televisions today have a standby mode, which is a setting that allows the TV to receive power even when it is turned off. This mode can be an energy-saving feature in some circumstances. For instance, a TV in standby mode can power itself down if there is no activity for a certain period. However, standby mode still consumes power, and the amount varies depending on the TV and its configuration.
The standby power consumption of a TV can range from as low as 0.2W to as high as 20W. The average smart TV standby power draw is around 14W, while newer sets with optimized "smart standby" functions can consume as little as 0.2W. Older CRT TVs consume 1.5W in standby, while modern LCD TVs use less than 1W. The standby mode electricity estimates range from about 2.25% to 5% of the power consumed while the TV is on.
Some ""smart wake" features on modern TVs can cause a TV's overall annual electricity consumption to increase by as much as 75%. These features allow users to wake their TV through voice command or seamlessly shift from a tablet or phone to the TV. While convenient, these features can lead to increased energy consumption and higher utility costs over the TV's lifetime.
To reduce power consumption, individuals can turn off the "Quick Start" or ""smart wake" features to ensure the TV is fully shut down when not in use. Additionally, powering off the TV at the wall or using a smart power strip can help eliminate vampire power drawn by the TV and other entertainment devices.
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Energy efficiency
One such feature is the "smart wake" or "Quick Start" function found on many smart TVs. This feature allows users to turn on their TV using voice commands or by casting content from a phone or tablet. While convenient, these features can cause a significant increase in power consumption when the TV is in standby mode. In some cases, enabling these features can increase a TV's annual electricity consumption by up to 75%. This adds up over time, resulting in higher utility costs for consumers. Therefore, it is recommended to disable the Quick Start feature to ensure the TV is fully shut down when not in use.
Another way to improve energy efficiency is to utilise the TV's light sensor, which automatically adjusts the screen's brightness based on ambient lighting conditions. Running a TV at a static brightness can consume more power than necessary. Modern smart TVs are designed to seamlessly adjust the lighting without affecting the viewing experience.
The age and type of TV also play a role in energy efficiency. Modern LCD and LED TVs are designed with energy efficiency in mind and are more efficient than older, conventional models. Additionally, smaller TVs generally consume less power than larger ones. When purchasing a new TV, consider the Energy Star rating, as these TVs are 25% more efficient than conventional ones.
Simple habits can also contribute to energy efficiency. For example, turning off the TV when leaving the house or using the sleep timer to automatically switch off the TV if you fall asleep can help reduce unnecessary power consumption. Additionally, avoiding the habit of running the TV in the background while using other devices can also lower energy usage.
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Smart TVs
On average, smart TVs use around 14W of power in standby mode, but this can range from as little as 0.2W to as much as 20W. This means that the cost of leaving a smart TV in standby mode can vary significantly, from just $0.18 per year for a TV using 0.2W, to $17.52 per year for a TV using 20W, assuming power costs 12 cents per kWh.
To reduce the power consumption of your smart TV, you can try turning off any "smart wake" or "Quick Start" features, which may cause the TV to use more power in standby mode. You can also try adjusting any ECO settings and timers to optimise performance and efficiency. If you're not going to be using the TV for a while, it's best to turn it off at the wall to prevent it from drawing any power at all.
When purchasing a new smart TV, it's worth considering the power usage of different models. Energy Star-certified TVs are 25% more efficient than conventional TVs, and you can easily compare different products on the Energy Star website. Modern LCD and LED TVs are generally more energy-efficient than older CRT or plasma models, and smaller TVs will consume less power than larger ones.
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Power strips
Even when a TV is in sleep mode, it still uses some power. The amount of power used varies depending on the TV and how it's configured, ranging from 0.2W to 20W. Newer TV models with properly optimized "smart standby" functions consume less power in sleep mode, sometimes as little as 0.2W.
To avoid unnecessary power consumption, it is recommended to turn off the Quick Start or "'smart wake' feature on your TV, so that it is fully shut down when not in use. You can also use your TV's sleep timer to automatically switch it off if you fall asleep while watching. Additionally, consider adjusting the brightness settings to save energy, as running your TV at a static brightness can consume more power than necessary.
To further reduce standby power consumption and save energy, you can use advanced power strips or surge protectors. These devices work in tandem with your TV and other electronics, intelligently cutting off power to connected devices when they are not in use. They detect when a device is in a low-power mode and then shut down any attached peripherals, such as task lights or printers. These power strips can help simplify your routine and save you money on your energy bills by reducing vampire power loss.
When purchasing a new TV, consider choosing modern LCD and LED models designed with energy efficiency in mind. Look for the Energy Star rating to find TVs that are 25% more efficient than conventional options. Additionally, keep in mind that smaller TVs generally consume less power than larger ones, and the brand of the TV can also impact its energy efficiency.
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Screen type and size
When a TV is in sleep mode, it does use some power, though the amount varies depending on the make and model. On average, a TV in sleep mode uses 1-5 watts of electricity, but this can range from 0.2 watts to 20 watts. This is known as "vampire power", and it can add up to significant energy consumption over time, especially with newer smart TVs that have ""smart wake" features. These features allow users to wake the TV with a voice command or cast content from another device, but they can increase annual energy consumption by up to 75%.
The type and size of a TV screen are important factors that influence power consumption. Modern TVs, such as LED and OLED models, are generally more energy-efficient than older CRT and plasma TVs. LED TVs, for example, consume 24-28 watts for small sizes and 90 watts for larger screens, while CRT TVs can use up to 120 watts. Similarly, a 42-inch LED TV typically uses about 64 watts per hour, while a plasma TV of the same size consumes around 195 watts per hour.
The larger the screen size, the higher the power consumption. A 48-inch TV, for instance, consumes 80 watts, while a 65-inch TV uses approximately 115 watts. This increase in power consumption with screen size is true for most TV technologies.
However, it's worth noting that some modern large-screen TVs have been designed with energy efficiency in mind, and certain brands may offer more energy-efficient options. For example, Samsung's range of 4K smart TVs has been shown to consume less energy than similarly sized LG TVs. Additionally, Energy Star-certified TVs are 25% more efficient than conventional TVs, so looking for this certification when purchasing a new TV can help reduce power consumption.
In summary, when considering screen type and size, modern LED and OLED TVs are generally more energy-efficient than older technologies, and larger screens tend to consume more power. However, advancements in energy efficiency for larger TVs and brand-specific differences should also be considered.
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Frequently asked questions
Yes, a TV uses power when in sleep mode. The amount of power used varies depending on the make and model of the TV, ranging from 0.2W to 20W.
The cost of keeping a TV on standby will depend on the wattage and the price of your electricity. For example, if you pay 0.70kWh for electricity and your TV uses 20W in standby, it will cost you $17.52 a year.
You can reduce the power consumption of your TV by turning it off at the wall when it's not in use. You can also adjust the ECO settings and timer to reduce power usage.
Newer TVs are designed with energy efficiency in mind, so they generally use less power than older models. For example, modern LCD TVs use less than one watt of power in standby mode.
Smart TVs can use more power than regular TVs due to their smart wake features, which can cause a TV's annual electricity consumption to increase by up to 75%. However, newer smart TVs with properly optimized "smart standby" functions can consume as little as 0.2W in standby mode.
