待机功耗计算器
使用待机功耗计算器统计家中电器在待机模式下的隐形耗电量。输入各设备的待机功率，计算年度待机总电量kWh和浪费的电费，发现消除待机浪费的方法。
Annual Standby Cost
98.55 USD
Annual Standby Cost vs Electricity Rate
公式
How to Calculate Standby Power Cost
Standby power (phantom load) is electricity consumed by devices when they are turned off but still plugged in.
Formula
Annual kWh = Devices * Avg Standby Watts * 8,760 hours / 1,000
Annual Cost = Annual kWh * Rate
Common Standby Draws
计算示例
15 devices averaging 5W standby power at $0.15/kWh.
- 01Total standby: 15 * 5 = 75 watts
- 02Annual kWh: 75 * 8,760 / 1,000 = 657 kWh
- 03Annual cost: 657 * $0.15 = $98.55
- 04Monthly cost: $98.55 / 12 = $8.21
常见问题
How much does standby power cost the average home?
The average US home spends $100-200 per year on standby power, accounting for 5-10% of total electricity use. The Department of Energy estimates standby power costs US consumers $19 billion annually.
How can I reduce standby power?
Use power strips to cut power to groups of devices, unplug chargers when not in use, choose Energy Star devices with low standby draw, and use smart plugs with scheduling.
Which devices have the highest standby draw?
Cable and satellite boxes (15-30W), older gaming consoles (10-25W), and desktop computers in sleep mode (5-15W) are among the worst offenders.