Unplugging Devices Really Saves Electricity? Experts Warn: Never Unplug These 3 Appliances—It Increases Costs and Risk of Damage

Many people have been taught since childhood to unplug electrical appliances when not in use to save on electricity bills. However, does this long-standing energy-saving habit apply to all household devices?

While it's true that unplugging reduces 'standby power' consumption, not all appliances are designed to handle prolonged power disconnection. For some devices, doing so may negatively impact functionality and even increase the risk of failure.

What is Standby Power? Devices Still Consume Electricity After Being Turned Off

Many assume that pressing the power button fully stops electricity usage. In reality, most modern appliances continue to draw a small amount of power even when switched off—this is known as 'standby power.'

Standby power maintains internal clocks, memory, network connectivity, or remote signal reception. Even though the device appears off, a tiny current still flows. To completely cut power, you must unplug the device or use a switchable power strip.

Which Appliances Benefit Most from Unplugging? TVs and Older AC Units Show Noticeable Savings

Not all appliances consume the same amount of standby power. Some, over time, can significantly add to electricity costs.

For example, TVs account for about 10% of a household’s total standby power. A 55-inch 4K TV consumes approximately 0.5 watts on standby—potentially saving around 100 New Taiwan Dollars annually (depending on electricity rates and usage).

Air conditioners are another common source of standby consumption. A typical unit uses about 2.4 watts on standby. Unplugging during off-seasons for six months can yield measurable savings. However, newer energy-efficient models often have near-zero standby usage, so unplugging may not be necessary—check your product specifications.

Appliances You Should Never Unplug: Refrigerators and Bidet Toilets Need Constant Power

While unplugging reduces standby consumption, it's not suitable for all appliances.

Refrigerators, for instance, must run 24/7 and should never be unplugged. Similarly, bidet toilets, gas water heaters, and home intercom systems require constant standby power to function properly.

Moreover, some air conditioners may suffer if completely powered off for extended periods. The compressor’s lubricating oil might not remain in optimal condition. If left unpowered for over a year, the unit’s lifespan could be shortened. For long-term storage, it’s recommended to power the unit periodically.

Downsides of Unplugging: Timers and Memory Settings May Reset

Frequent unplugging can also disrupt functionality beyond maintenance concerns.

Devices like TVs and DVRs may require reconfiguration of clocks, recording schedules, and timers after a full power loss. Smart appliances may need to reconnect to Wi-Fi or re-sync with apps.

Therefore, when deciding whether to unplug, consider not only energy savings but also the impact on daily convenience.

Too Inconvenient to Unplug Daily? Energy-Saving Power Strips Are a Great Alternative

If repeatedly plugging and unplugging is cumbersome, consider using switchable energy-saving power strips.

These allow you to cut power with a single switch, eliminating the need for physical disconnection. They’re convenient and reduce wear and tear on plugs and outlets.

Additional Benefits: Reduced Fire Risk

Unplugging rarely used appliances not only saves energy but also improves safety. It reduces the risk of fire caused by dust buildup, moisture, or electrical arcing in outlets.

However, not all appliances should be left unplugged long-term. Focus on managing devices like TVs, audio-visual equipment, and older AC units when unused. For refrigerators, bidet toilets, and other essential systems, maintaining regular power ensures both energy efficiency and device longevity.

Source: FINANCIAL FIELD | Editor: Li Yiqing