“Vampire devices are secretly draining hundreds of dollars from your home!” — the claim is half right, and the wrong half does real damage: it sends people crawling behind furniture to unplug 0.3 W chargers while a 25 W cable box hums away unnoticed. Here is the honest version.

What standby actually costs

Lawrence Berkeley National Laboratory’s standby-power work is the standard reference: standby loads are roughly 5–10% of residential electricity use. For a home using ~880 kWh/month, that’s ~45–90 kWh — $7–14/month or $85–170/year at $0.16. Real money, worth recovering — and recoverable mostly by targeting the top few devices rather than waging war on every LED indicator.

The honest watt table

What common devices draw while “off” or idle — typical ranges, since models vary:

device	standby/idle draw	≈kWh/yr (24/7)	≈$/yr
Cable/satellite DVR box	15–30 W	130–260	$21–42
Desktop PC, sleep mode	1–5 W (on: 65+)	9–44	$1–7
Game console, instant-on	8–15 W	70–130	$11–21
Game console, energy-saver	~0.5–1 W	4–9	<$1.50
Smart speaker	2–4 W	18–35	$3–6
Microwave (clock)	2–4 W	18–35	$3–6
TV, modern LED	0.5–2 W	4–18	$0.70–3
Printer, idle	2–6 W	18–53	$3–9
Laptop charger, no laptop	~0.5 W	~4	~$0.70
Phone charger, no phone	<0.3 W	<2.6	<$0.42
Garage fridge (the bonus one)	~80–150 W avg	700–1,300	$110–210

Two things stand out. First, the list is lopsided — a couple of set-top boxes and one garage fridge can outweigh every small charger in the house combined. Second, the notorious phone charger genuinely doesn’t matter: at <0.3 W it takes four months to burn a single kWh.

Why “off” isn’t off

Standby exists for three legitimate-ish reasons: instant-on readiness (infrared receivers, instant-resume consoles), keeping state (DVR guides, router tables, clock memory), and always-on conversion (power bricks that never fully disengage). The worst offenders combine all three — the DVR updates its guide all night at 25 W so it’s ready when you are.

What actually fixes it — in order of leverage

1. Retire or replace the set-top box. Many providers now offer lower-draw streaming boxes (~3–5 W); at $0.16 the swap pays back quickly. Some utilities even rebate it.
2. Kill the garage fridge. A 15-year-old spare unit is the single largest “standby” in many homes — $10–18/month to keep six sodas cold. A modern unit is ~60% cheaper to run; removing it is free.
3. Strip the entertainment cluster. TV + console + soundbar + streaming box on one switched strip: one click kills 15–35 W of idle draw nightly. A $15 strip, no apps needed.
4. Set consoles to energy-saver. “Instant-on” vs “energy saver” is the difference between ~10 W and ~0.5 W — a settings toggle, not a purchase.
5. Schedule the office/guest room. Printers, guest TVs, spare routers on timers or smart plugs — set once, forgotten.
6. Sleep the PC properly. A sleeping desktop at 2–4 W beats a “still on” one at 65–120 W; configure auto-sleep and it’s automatic.

And what to skip

Unplugging phone chargers, chasing the microwave clock, or unplugging a modern TV nightly — each saves under ~$4/yr. Do them if they make you feel better, but budget your effort where the watts are. The honest rule: if the standby draw is under ~2 W, the payback is under ~$3/year — fine as a habit, useless as a strategy.

Measuring yours instead of trusting tables

Every number above is a typical range — your hardware has its own truth, and two cheap ways to see it:

• A plug-in energy meter (~$25) sits between the wall and the device and accumulates real kWh. Leave it on the cable box for a week; multiply by 52. This is also how you catch a device lying about its sleep mode.
• Your utility’s hourly usage portal. Most smart-metered homes can download interval data from the account site. The flat floor your usage never dips below at 3 a.m. — that’s your whole-home standby, no meter needed. A 90 W floor is ~$125/yr; a 30 W floor is already tight.

The bigger framing

Phantom load is a rounding error next to thermal loads. Trimming $10/mo of standby is worthwhile — after you’ve looked at HVAC and water heat, which the biggest-users ranking sizes honestly. To measure your own devices rather than trust tables, a $25 plug-in meter or your utility’s hourly usage portal settles it in a week — and the estimator can turn whatever you find into dollars.

Frequently asked questions

How much does standby power cost per year?

Studies (notably Lawrence Berkeley National Lab's) put standby at roughly 5–10% of residential electricity — about 500–900 kWh/yr for a typical US home, or $80–140 at $0.16/kWh. Meaningful, but it's concentrated in a handful of always-on devices, not spread across every plug.

Is it true phone chargers waste lots of energy plugged in?

No — this is the most persistent myth. A modern phone charger draws well under 0.3 W with nothing attached: under ~2.6 kWh and ~$0.42 per year. Unplug it if you like, but the cable box next to it draws fifty times as much.

What's the single worst standby offender?

Set-top boxes — cable/satellite DVRs drawing 15–30 W around the clock whether the TV is on or not, often 130–260 kWh/yr each. After that: old desktop PCs left on, game consoles in 'instant-on' mode, and anything with a warm power brick.

Do smart plugs / power strips actually help?

Genuinely, yes — for the right cluster. A switched strip on the TV + console + sound system kills 20–40 W of idle draw for zero daily effort. Timer or smart-plug on the office printer, the guest-room TV, the garage fridge: same idea, scheduled automatically.

Should I unplug my TV every night?

Not worth the ritual — a modern LED TV draws ~0.5–1 W standby, under $1.50/yr. The exception is a decade-old set (5–10 W standby). The strip approach is strictly better: same savings, no daily bending behind furniture.

Why does my 'off' microwave still draw power?

The clock and control board. Most microwaves idle at 2–4 W — more per year than most people spend cooking in it. It's honest to note that's still only ~$4/yr; the fix list should start with the 25 W boxes, not the 3 W ones.