7 Smart Home Devices That Never Truly Turn Off—and Increase Your Energy Bill

I used to think smart home devices were doing me a favor. Lights that turn off by themselves. A speaker that answers questions. A thermostat that promises lower bills. Everything felt efficient, modern, under control.

Then my power bill started creeping up. Not a spike. Not a shock. Just a quiet, steady increase that didn’t match how I actually live.

That’s when I started looking closer at what’s really happening behind the scenes. Most smart devices don’t ever fully turn off. They’re always listening, always connected, always ready. Even when you’re asleep or out of the house, they’re still pulling power in the background.

If you’ve ever wondered, do smart home devices use more electricity, the honest answer is: yes, they can—especially when you stack several of them together. One device won’t break your budget. Seven or ten might quietly nudge it every single month.

What most articles miss is this middle ground. Smart tech isn’t bad. It’s not a scam. But it’s also not “free” just because you’re not actively using it. The real cost hides in standby power, Wi-Fi connections, and devices designed to stay on 24/7.

In this article, I’m not here to scare you or tell you to unplug everything. I want to show you which smart home devices are the biggest silent contributors to your electric bill, why they behave this way, and where the trade-off actually makes sense.

Before we get into the list, take a second and think about your own home. How many smart devices are plugged in right now—and how many of them truly need to be “always on”?

Understanding Electricity Use in Smart Homes

Before blaming any one device, you and I need to understand what’s really happening inside a smart home.

Most smart homes don’t use more electricity because devices are doing more work. They use more electricity because many of these devices are never fully off. They sit quietly in the background, drawing small amounts of power all day, every day. When you realize how many devices stay connected 24/7, it’s also worth thinking beyond electricity — always-on connectivity can create security risks too, which is why understanding smart home cybersecurity and how to protect connected devices from hackers is just as important as managing energy use.

One device feels harmless.
A house full of them slowly adds up.

This matters because once you understand how “always-on” power works, you stop guessing and start making smarter decisions about what’s actually worth keeping plugged in.

What Is Standby or “Phantom” Power?

Standby power — also called phantom power — is the electricity a device uses even when you’re not actively using it.

If a device can:

• Connect to Wi-Fi
• Listen for voice commands
• Sync with an app
• Receive updates

…it’s pulling power right now.

This is where people get caught off guard. You don’t see standby power working. There’s no sound, no heat, no movement. But over time, these idle loads can make up a noticeable portion of your home’s electricity use.

That’s why people often say, “Nothing changed, but my bill went up.” Something did change — your home became more connected, and more awake, 24/7.

How Smart Devices Differ From Traditional Ones

A traditional device is simple: on or off.

Smart devices live in between.

Even when idle, most smart devices are:

• Staying connected to the internet
• Waiting for commands
• Monitoring sensors or routines
• Communicating with cloud servers

That constant readiness is the price of convenience.

As explained in The Spruce’s breakdown of smart home power usage many smart devices continue to draw electricity simply because they’re designed to stay responsive — not because you’re actively using them.

Think of it this way:

• A regular light switch sleeps until you touch it
• A smart switch stays half-awake all the time

That design choice is why smart homes feel effortless — and why the energy use is easy to miss.

Device #1: Smart Speakers & Voice Assistants

Smart speakers are everywhere — kitchens, bedrooms, offices. And almost no one thinks of them as energy users.

But a smart speaker is always listening for its wake word. That means it never truly shuts down.

Even when it’s silent, it’s still:

• Powering microphones
• Maintaining a network connection
• Staying ready to respond

Individually, the power draw is small. But the clock never stops.

Why this adds up over time:

• They run 24 hours a day
• Many homes have more than one
• Power is used even when no one is home

Another thing most people miss:

• Wi-Fi–based speakers generally use more standby power
• Devices using low-power protocols tend to be lighter on energy

If you use your voice assistant daily, the trade-off may be worth it.
If it mostly sits unused, it’s quietly costing you money for convenience you’re not really using.

Device #2: Smart Thermostats

Smart thermostats are marketed as money savers — and they can be. But only if you actually use them the right way.

Yes, smart thermostats also draw power while idle. They need electricity to:

• Stay connected
• Run sensors
• Sync schedules and apps

On its own, that standby use is small.

The real difference comes down to behavior.

Smart thermostats save energy when you:

• Set schedules and let them run
• Allow temperature setbacks when you’re away
• Use automation instead of manual overrides

They lose value when:

• You constantly change settings
• The system runs like a regular thermostat anyway
• Smart features stay on, but smart habits don’t

In that worst-case scenario, you’re paying the standby cost without getting the benefit.

The device isn’t broken.
It just can’t save energy if you don’t let it.

Device #3: Smart Light Bulbs & Smart Switches

Smart light bulbs feel like a no-brainer upgrade — LED efficiency, remote control, cool automation tricks. But here’s what most people overlook: the “smart” part itself uses power, even when the light is off.

Unlike a normal LED that only draws energy when it’s lit, a smart bulb has to stay connected to your network so it can:

• Respond to an app or voice command
• Update firmware
• Be ready for schedules

That means a tiny, constant draw of electricity — even in standby.

Then there are smart switches. These have to stay energized to communicate with your system, which means they always pull a bit of power to:

• Maintain connection
• Listen for on/off requests
• Talk to bulbs or hubs

Alone, that’s tiny. But it adds up when you install them throughout the house. Real-world voices in smart home communities often point out that even 1–2 watts per switch can start to matter when multiplied across dozens of switches running 24/7.

Smart lighting still makes life easier. But don’t assume it costs nothing just because you’re not flipping a switch manually.

Device #4: Security Cameras & Video Doorbells

If there’s one category that never sleeps, it’s security cameras and video doorbells.

These are designed to be alert all the time — constantly scanning for motion, streaming video, and communicating with the cloud. Many homeowners accept this constant power draw because security devices offer peace of mind, and when chosen carefully, the right setup — like the ones covered in smart home tools that keep your house safe from burglars — can justify the always-on energy cost.

That means they’re always drawing power.

Most wired cameras and doorbells pull a steady few watts just to:

• Stay connected to Wi-Fi
• Record and upload footage
• Monitor sensors
• Deliver push alerts to your phone

The cloud connection amplifies the cost, because every upload and every sync session uses more energy than just sitting idle.

This is where it helps to think strategically: battery-powered models or low-power modes exist for a reason. They trade always-on responsiveness for significantly lower energy draw because they’re not streaming or syncing constantly, only waking up when needed.

Security is important, but it’s also a clear example of where convenience comes with a small, ongoing energy cost — and where smarter choices can make a real difference.

Device #5: Smart Plugs and Outlets

Smart plugs are probably the trickiest category, because they can save you money — or quietly add to your bill — depending on how you use them.

Every smart plug itself uses power. It has to stay online, listen for commands, and manage schedules. That’s the cost side.

The benefit side comes when you use it to cut power to devices that waste energy when idle.

That’s where smart plugs shine — and where people often recommend them. In fact, according to a practical look at how automation impacts home energy use by Home Energy Club smart devices can reduce overall energy use when you automate them to shut off energy vampires instead of leaving them powered all the time.

The key is strategy:

• A smart plug on a lamp you already turn off manually? Not much gain
• A smart plug cutting power to a game console that stays warm all night? Real savings
• Using schedules to turn off entertainment systems or chargers when you’re asleep? Noticeable reduction

People who use smart plugs this way often see meaningful savings because they’re targeting actual wasted energy, not just adding another always-on gadget.

Device #6: Wi-Fi Routers, Hubs & Network Equipment

If smart home devices are the body, your router and hubs are the heart — and the heart never stops beating.

Wi-Fi routers, smart hubs, mesh nodes, and bridges are designed to stay on 24/7. You rarely think about them because they don’t beep, blink much, or ask for attention. But they’re doing constant work in the background.

Most homes now run:

• A main Wi-Fi router
• One or more mesh nodes
• At least one smart home hub

Together, these devices can pull a steady chunk of power all day long, whether you’re home or not.

Unlike smart bulbs or plugs, there’s no “off” schedule here. If the network goes down, the smart home stops working. That’s why this category quietly becomes one of the largest always-on energy users in a connected home.

This matters because every smart device you add leans on this backbone. More devices mean more network activity, more syncing, and more constant power use — even if each individual gadget seems efficient.

Device #7: Smart Appliances (Fridge, Washer, HVAC Controllers)

Smart appliances are expensive, so people expect them to be smarter about energy. And often, they are — but the story isn’t as simple as “smart equals savings.”

Smart refrigerators, washers, dryers, and HVAC controllers all use electricity even when idle to:

• Maintain connectivity
• Run sensors and displays
• Sync with apps or cloud services

That standby and connectivity load is usually small — just a few watts — but it’s continuous.

Here’s the important balance most articles miss.

On one side:

• Yes, smart appliances do use a bit more electricity than non-smart versions when sitting idle

On the other:

• Many smart appliances are Energy Star–rated
• They optimize cycles, reduce waste, and improve efficiency during actual use

So while the smart features add a small always-on cost, the net result can still be lower overall energy use, especially for appliances that run often or consume a lot of power.

This is one of those areas where smart tech actually earns its place — but only if you look at total usage, not just standby draw.

How Much Are You Really Paying? A Realistic Cost Breakdown

This is the question most people are really asking, even if they don’t phrase it this way.

Not: “Do smart home devices use more electricity?”
But: “How much more is this actually costing me?”

Based on typical power draw estimates summarized by Akıllıeviniz a moderately smart home can quietly add up to a noticeable annual cost just from always-on devices.

Here’s how it usually breaks down in real life:

• A few watts per device doesn’t feel like anything
• Multiply that by 10–20 devices
• Run it 24 hours a day, all year

That’s where people get surprised.

The most important takeaway isn’t the exact dollar amount — it’s understanding the difference between:

• Active usage (when devices are actually doing something useful)
• Invisible usage (when devices are just staying awake and connected)

Smart homes don’t become expensive because of one bad decision.
They get expensive through lots of small, invisible ones.

Smart Home Energy Saving Strategies That Actually Work

The problem with most articles on smart home energy use? They give you a list of devices but don’t tell you what to actually do about it.

If you want to cut down on your power bill without losing all the convenience, it’s time to think tactically. Here are real, actionable strategies that can help you save without sacrificing smart living.

Use Scheduling & Presence Detection

One of the simplest — yet most effective — ways to reduce your energy consumption is by automating your smart devices to only run when necessary. Scheduling and presence detection are your best tools here.

For example:

• Lights and plugs should turn off automatically when you’re not home.
• Thermostats should adjust based on your location — warm up the house before you get home, cool it down after you leave.

Group Devices With Smart Strips / Power Monitoring

A simple but game-changing strategy? Grouping your always-on devices with smart power strips or outlets that you can turn off at once. This way, you control multiple devices in one go, instead of trying to remember which ones are using idle power.

Many real-life users have reported savings simply by powering off their entertainment systems or office setups overnight, especially when they’re plugged into smart strips.

Think of it as a way to streamline your energy use without sacrificing convenience.

Choose Low-Power Protocols (Zigbee/BLE) Over Wi-Fi

Smart devices are fantastic, but Wi-Fi isn’t always the most energy-efficient option for every gadget. Switching to low-power protocols like Zigbee or Bluetooth Low Energy (BLE) can reduce power usage dramatically.

Common Misconceptions About Smart Devices & Electricity

One of the most frequent things I hear is: “I got a bunch of smart switches, and my power bill jumped!”
But here’s the reality: a single device isn’t usually the culprit. Let’s break it down.

“I Got Smart Switches and My Bill Jumped!”

It’s easy to panic when you see a bill increase right after adding new tech. But what likely happened here is a misinterpretation of energy use.

• Smart switches often draw a small amount of power to stay connected, but it’s not enough to skyrocket your bills on its own.
• The issue is often mismanagement — devices running unnecessarily or plugged in when they don’t need to be.
• Most importantly, smart devices do draw more power than their non-smart counterparts, but they also offer long-term savings in energy management if used effectively.

It’s less about the device and more about how you’re using it. A smart switch might be a part of a system that is consuming more electricity because it’s staying “always on”.

Myth vs Reality: A Single Device Rarely Blows Up Your Bill

Let’s settle this once and for all: one device rarely leads to a massive spike in your power bill.

When people complain about smart devices making their bills jump, it’s usually because of:

• A collection of devices all using small amounts of energy
• Misuse or failure to disable standby power

Think of it like this: A few watts here and there add up over time, especially if you’ve added multiple devices.

Checklist: Should You ‘Always On’ It or Turn It Off?

Here’s your practical, actionable checklist. This decision matters even more in family homes, especially if you’re balancing safety, automation, and screen-free environments — something we’ve broken down in detail in our guide on how to build a kid-friendly smart home with AI tech.

You don’t have to be an energy expert to decide whether a device should stay on all the time or be turned off.

When to Let It Stay On:

1. Security devices (Cameras, sensors) that need to be “always awake” for protection.
2. Smart thermostats that need to adjust temperature based on routines, or when you have optimized schedules.
3. Smart plugs that are set to turn off energy vampires automatically.

When to Turn It Off:

1. Devices that don’t need to be on constantly, like extra smart speakers, chargers, or light bulbs that stay “ready.”
2. Unused gadgets (smart devices you don’t use enough to justify their constant draw).
3. Wi-Fi routers and hubs — unless you’re using a mesh network or have a reason to keep the network always on.

Keep this checklist in mind when you look around your house — it’s a quick way to spot where you can save without losing convenience.

Conclusion: Saving Energy Without Sacrificing Convenience

At the end of the day, smart home technology can save you energy, but only if you use it intentionally. It’s easy to fall into the trap of thinking that adding gadgets will save you money or make you more efficient. But as we’ve seen, it’s the little decisions you make with those gadgets that matter.

You don’t need to unplug everything. Just be mindful of the always-on devices and adjust your habits or settings. Small tweaks add up to big savings.

Did you find this breakdown helpful? Drop your thoughts in the comments below — I’d love to hear your experiences with smart home energy usage! Also, if you want to learn more about how to manage your smart devices effectively and build a more energy-efficient home, visit us at Build Like New for more in-depth articles and tips.

Disclaimer: The information provided in this article is for general informational purposes only. While we strive to offer accurate and up-to-date advice, actual energy savings may vary depending on your specific devices, usage, and environment. Always consult with a professional if you need personalized energy-saving recommendations.