You may not know: the appliances that are turned off at home, the power consumption is amazing.

In the past, there was a difference between the opening and closing of electrical appliances. The difference is now more complicated – Alan Meier, a senior scientist at the National Laboratory's Department of Energy, estimates that about 50 devices and appliances in an average household in the United States are consuming electricity, even when the appliances are off.

This is the so-called poly sand into a tower. According to a study by the Natural Resources Defense Council's Northern California, about a quarter of residents' electricity consumption is spent on devices in standby mode. That is to say, turning off the device or standby mode or sleep mode consumes up to 50 power plants, and costs more than $190 billion a year. At the same time, there will be environmental costs: the entire electricity production represents 37% of the carbon dioxide emissions in the United States, which is one of the main factors of climate change.

In the name of a scientific investigation, I tested 30 devices from my friends and my own home. This test was to plug the device into a one-watt meter, and the meter could track how much power was consumed at any time.

Many appliances consume the same power when they are turned off.

My set-top box has 28 watts of power when it's on and recording, and 26 watts when it's off and doesn't record anything. Although I never watch TV, I consume 227 kWh per year. According to World Bank estimates, it is placed in a certain context, which exceeds the annual consumption of ordinary people in some developing countries, including Kenya and Cambodia.

Always let the laptop power up - even when it's fully charged - it will consume the same amount of power - 4.5 kWh a week, or about 235 kWh a year (of course your records will depend on the model and The battery is different. My computer has been used for some years, and some readers show that Apple notebooks consume less power.

Many devices are always on

In 2014, 73% of American households had high-speed Internet connections, which usually required at least one cat and one router.

Even if the switchgear does not consume much power, in most homes these devices have never been turned off. This is the case with television.

Turn on the TV with the remote control and the TV must be on to receive the signal. If it is a smart TV, it must be in online mode. And if your TV is in Quick Start mode, this mode can avoid 15 seconds of pain waiting to boot, but it will consume more power.

Many traditional home devices—from your grandmother's generation—are now online, just like your grandmother. Light bulbs, ovens, refrigerators, coffee makers and even mattresses are now connected to the network, so they also consume power all the time.

While durable appliances such as dishwashers or washing machines have become more efficient with the times, many models now have digital displays, which means they also consume a small amount of electricity.

There are also a large number of low energy devices

Although appliances have become more efficient, we have used more: According to World Bank data, in 1996, ordinary Americans used about 5,590 kWh per year. In 2013, this data quickly rose to 12,985 kWh per year.

Some of the increase comes from electronics: almost two-thirds have laptops, half have tablets or e-readers; 64% have smartphones; 36% have three.

But some traditional kitchen utensils, before the network, used some power when they were opened or not often opened. My tests showed that my drip coffee machine had a power of more than 900 watts and used it for a few minutes as soon as possible. If a coffee machine takes ten minutes to make a cup, once a day, it will consume 50 kWh per year, or slightly more than one Niger's annual electricity.

The easiest way to reduce hidden energy consumption

By installing smart meters in certain areas, many utility companies provide hourly data on power consumption, which allows you to record your home's hourly electricity consumption.

Perhaps the easiest way to limit power usage is to use a power strip to sort devices—such as TVs, game consoles, powered speakers, DVD players, and streaming devices—you can turn them off at the same time. However, Dr. Meier also warned that because some products have timers or network connections, network connections, time, and other information may be lost if you turn off the power to the power strip.

If you order movies in Stream's game controller, then it's best not to. According to the data of the Natural Resources Defense Council, they consume 45 times more power (playing games). After all, as a handheld device, it is not good at doing this.

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