Does Leaving Things Plugged In Use Electricity?
Yes, most electronics use 1-5 watts when plugged in but off or in standby mode. This 'vampire power' can add $50-100+ to annual electricity bills. Items with clocks, lights, or remote functions use the most standby power.
Key Takeaways
- Standby power (phantom load or vampire power) keeps devices ready to respond to remotes, maintain clocks, or charge internal batteries.
- Smart power strips cut power to devices automatically when the main device is off.
- Some devices need continuous power (routers, security systems, refrigerators).
Explanation
Standby power (phantom load or vampire power) keeps devices ready to respond to remotes, maintain clocks, or charge internal batteries. TVs, game consoles, and cable boxes are common culprits, using 1-15 watts each in standby.
The average home has 20-40 devices drawing standby power, totaling 50-100 watts constantly. At $0.16/kWh, this costs $70-140 per year just for devices that aren't actively being used. Use the Power Cost Calculator to calculate your standby costs.
Modern phone chargers use very little power when not charging (under 0.5W). But older chargers, gaming consoles, and set-top boxes can be significant. Cable DVRs may use 30-40 watts even when 'off.'
Things to Know
- Smart power strips cut power to devices automatically when the main device is off.
- Some devices need continuous power (routers, security systems, refrigerators).
- The largest standby loads are usually desktop computers, game consoles, and cable/satellite boxes.