Unplugging some devices does eliminate standby power, but savings depend on how much they draw when apparently off and how many hours they sit that way. Efficient modern devices may use very little; others with displays, networking, or adapters draw continuously.
Measure or look up standby power
A properly rated plug-in energy meter can compare operating and standby watts. Multiply standby power by annual hours to see whether changing habits is worthwhile.
Group small standby loads with a suitable smart strip
A television, game console, and peripherals can sometimes be switched together if they do not need essential standby functions. Do not use a strip for loads that require direct wall connection or equipment that must stay powered.
Do not unplug refrigeration, alarms, or essential network equipment for tiny savings
Refrigerators, freezers, alarms, and some security systems need continuous power. The cost of lost function or safety outweighs any standby savings.
Prioritize major loads before chasing tiny standby draws
Heating, cooling, water heating, dryers, and other high-power loads usually dominate the bill. Cutting runtime or improving efficiency there can save far more than unplugging a modern charger with almost no standby draw.
Sources
- U.S. Department of Energy — Energy Saver — Residential energy efficiency, heating and cooling, and equipment use.