The lights are off, the house is quiet and nothing seems to be running. But electricity is silently flowing through the plugs in your home. This hidden drain is known as phantom energy.

Also called vampire energy, the wasted electricity comes from leaving devices plugged in when they’re not in use. That could range from household items such as phone chargers and microwaves to TVs and gaming consoles.

This wasted electricity accounts for about 5% to 10% of home energy use, depending on factors like the age of the equipment, according to Alexis Abramson, dean of the Columbia Climate School.

“Phantom energy depends on … what kind of systems you have and how much they’ve improved over time,” said Abramson.

For example, televisions that are connected to the internet and have smart wake features that allow them to interact with phones and other devices can consume up to 40 watts of energy during the hours of the day that the TV would normally be off, according to Matt Malinowski, director of the buildings program at the American Council for an Energy-Efficient Economy. That’s almost 40 times as much as a regular television.

“The good news is there have been new, renewed efforts to tackle this,” said Malinowski.

He said advocates and manufacturers have come up with a voluntary agreement seeking to reduce the amount of energy smart televisions use when they’re in standby mode.

Phantom energy contributes to climate change because power drawn by unused devices can increase demand for electricity from sources that release planet-warming emissions. Aidan Charron, associate director of Global Earth Day, said that while the amount may seem small when a person looks at their individual utility bill, the environmental toll of phantom energy is significant when multiplied over homes across the country.

“Just take a little step of unplugging the things that you’re not using,” said Charron. “It will save you money and it’ll save emissions in the long run.”

What You Can Do

Some of the main culprits when it comes to draining energy are appliances that are constantly connected to electricity, such as those with a clock.

“Do you really need your microwave to tell you the time, or can you unplug your microwave when you’re not using it?” said Charron.

Read the full article about eliminating phantom energy at WTOP.