you save depends on three main factors:
How much standby power each appliance uses
How long it remains plugged in
Your electricity price
Let’s look at a simple example.
Suppose a device draws 5 watts of standby power continuously.
To estimate its annual electricity use, multiply its wattage by the number of hours in a year and divide by 1,000.
For this example:
5 watts × 8,760 hours ÷ 1,000 = 43.8 kilowatt-hours per year.
If your electricity costs $0.20 per kilowatt-hour, that device would use about $8.76 worth of electricity annually while drawing that constant standby power.
That’s only an illustration—not a claim that every television, charger, or appliance uses 5 watts in standby mode.
Some devices consume much less, while others may use more. Your actual savings will depend on measured consumption and your local electricity rate.
What If You Unplug Several Devices?
Now imagine
