An energy vampire is a device that uses electricity while it appears to be off or is sitting in standby. TVs, computers, chargers and other electronics can draw this standby power, but the amount varies by device; being plugged in does not automatically make something a costly drain. For a bigger bill, heating, cooling, water heating, lighting and refrigeration may matter more than any single standby device.
What counts as an energy vampire?
The U.S. Department of Energy (DOE) describes standby power as electricity used by devices that appear to be turned off. Its standby-power guidance also explains that the IEC 62301 procedure measures standby consumption. This is different from equipment actively doing its job: a refrigerator running to keep food cold or a heating system conditioning a home is using electricity, but that is not standby power.
The nine categories below are practical places to look, not a ranked list. DOE identifies several as possible sources of vampire loads, but it does not establish a universal top nine or say every model draws a significant amount.
9 common places to check for standby power
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Televisions and home-theater equipment
A television or connected theater component may draw power while waiting for a remote command, maintaining settings or staying ready to turn on. The actual standby draw depends on the equipment.
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Set-top boxes and streaming devices
Boxes and streaming hardware may remain ready for a signal or update rather than fully powering down. Check whether the device has a true off setting and whether turning it off would interrupt a service or feature you rely on.
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Game consoles
A console in a low-power or quick-start mode may remain available for remote wake-up or background tasks. Compare the convenience of that mode with the option to shut down completely when the console is not in use.
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Computers and monitors
Desktop computers and monitors can use power in sleep or standby modes. Sleep is not the same as unplugged, though the draw and usefulness of leaving equipment ready vary by setup.
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Printers and other peripherals
Printers and connected accessories may keep a display, network connection or wake function active. If they are used only occasionally, check whether their standby mode can be disabled safely or whether a switched strip is suitable.
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Chargers and docks
DOE’s EnergySavers guide recommends unplugging chargers when they are not in use. Whether a particular charger has a meaningful standby draw is not established by its being plugged in alone; avoid the daily hassle if measurement shows the load is negligible.
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Stereos and other audio equipment
Receivers, speakers and audio components may stay ready for a remote, network command or connected source. DOE includes stereos among examples of possible vampire loads, not as a claim that every stereo is a major drain.
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Kitchen appliances with clocks or displays
Some kitchen appliances keep a clock, display or control circuit powered between uses. DOE lists kitchen appliances as possible sources of vampire power. Do not unplug an appliance if doing so would affect a required setting, safety feature or food storage.
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Network equipment and other always-on electronics
Routers, hubs and similar equipment are often deliberately left on because a household needs a continuous connection. Their consumption is ongoing use, not necessarily a device “off” in standby. Treat them as candidates to measure, and do not switch off equipment needed for internet, security or other essential functions.
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Standby loads are only one part of household electricity use
A DOE 2022 Energy Saver guide reproduces an Energy Information Administration (EIA) chart of U.S. residential electricity use per household in 2016. Those historical estimates cover total end uses, not standby power isolated from active use:
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| End use | 2016 household estimate |
|---|---|
| Cooling | 2.1 thousand kWh per household — Energy Information Administration, 2016 (reproduced in the U.S. Department of Energy’s 2022 guide) |
| Lighting | 1.1 thousand kWh per household — Energy Information Administration, 2016 (reproduced in the U.S. Department of Energy’s 2022 guide) |
| Heating | 1.1 thousand kWh per household — Energy Information Administration, 2016 (reproduced in the U.S. Department of Energy’s 2022 guide) |
| Water heating | 1.15 thousand kWh per household — Energy Information Administration, 2016 (reproduced in the U.S. Department of Energy’s 2022 guide) |
| Refrigerators and freezers | 1.05 thousand kWh per household — Energy Information Administration, 2016 (reproduced in the U.S. Department of Energy’s 2022 guide) |
| Laundry and dishwashing | 0.85 thousand kWh per household — Energy Information Administration, 2016 (reproduced in the U.S. Department of Energy’s 2022 guide) |
| Cooking | 0.3 thousand kWh per household — Energy Information Administration, 2016 (reproduced in the U.S. Department of Energy’s 2022 guide) |
| TVs and PCs | 1.0 thousand kWh per household — Energy Information Administration, 2016 (reproduced in the U.S. Department of Energy’s 2022 guide) |
| Other uses | 3.5 thousand kWh per household — Energy Information Administration, 2016 (reproduced in the U.S. Department of Energy’s 2022 guide) |
These figures are not current estimates for an individual home and cannot tell you how much of a bill comes from phantom power. DOE says appliances account for about 15% of household energy consumption; that broader figure is not a standby-load estimate. DOE’s energy-efficiency guidance addresses appliances and other ways to reduce energy use, while ENERGY STAR notes that heating and cooling consume more energy than any other appliance in the home.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to find and reduce standby loads safely
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Identify what can actually be switched off
Look for electronics that are not needed continuously, such as a group of TV accessories or a printer used occasionally. Keep equipment powered if it must maintain a safety function, food storage, security monitoring, network access or a setting you depend on.
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Group suitable devices on a switched strip
DOE recommends power strips as a way to avoid vampire loads. Connect only devices that can safely lose power together, then switch the strip off when the group is not needed. A smart plug or smart power strip can add scheduled or remote control where useful; ENERGY STAR’s home energy management criteria include plug-load monitoring or control as a system capability. That does not mean every smart plug or strip is ENERGY STAR certified.
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Unplug chargers when convenient
Unplug a charger when it is not being used if that is practical. DOE’s older guide suggests unplugging chargers when fully charged or idle, but the likely benefit depends on the charger’s measured draw and how often it is left connected.
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Measure before ranking suspects
If you want to know whether a device is worth changing, measure its power in the relevant mode with an appropriate electricity meter, or ask a qualified energy professional. DOE describes a standby measurement procedure, but does not endorse a particular consumer meter. A device’s plugged-in status alone is not enough to estimate its cost.
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Investigate large uses separately
If the bill remains high, review heating and cooling settings, air sealing, insulation, lighting, water heating and appliance efficiency. ENERGY STAR’s smart home energy tips discuss smart thermostats and other home energy measures. These actions address broader energy use, not standby power specifically; results depend on the home, equipment, climate, energy rate and behavior.
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