Do Smart Plugs Work During Power Outages?
No, a smart plug does not work during a power outage. Without electricity, the plug’s Wi-Fi radio, processor, and relay all lose power, so it cannot connect to your network, run schedules, or switch anything on. Once power returns, most plugs reboot and reconnect automatically, but any commands sent during the outage are lost.
Why a smart plug stops working when the power goes out
A smart plug is a small computer with a radio. It needs a continuous trickle of electricity to keep its Wi-Fi chip alive, maintain its connection to your router and the cloud, and hold its internal relay in the commanded position. When the grid fails, all of that stops instantly. The plug becomes an inert piece of plastic in the wall, and whatever was plugged into it loses power too unless it has its own battery.
What happens to schedules and timers during an outage
Schedules and timers are stored in the plug’s memory or in the manufacturer’s cloud. If they are cloud-based, they simply do not fire because the plug is offline. If they are stored locally, the plug still cannot act on them without power. When electricity returns, most plugs reload their last known schedule and resume normal operation, but any schedule that was supposed to trigger during the blackout is skipped, not made up later.
Does the plug remember its on/off state after an outage
Many smart plugs default to off when power is restored, which can be a problem if you were using one to keep a device running. Some models offer a power-loss recovery setting that restores the previous state, but that feature varies by brand and model and is not universal. If keeping a device on after an outage matters, check the plug’s app for a state-recovery option before relying on it.
Can you still control the plug from your phone during an outage
No. The plug has no power and no network connection, so the app will show it as offline and commands will fail. Even if your phone is on cellular data, the command has to reach the plug over Wi-Fi, and the plug is not listening. Some apps let you queue commands, but they only execute once the plug is back online.
What about battery backup or UPS setups
A smart plug plugged into a battery backup or UPS will keep working as long as the battery holds, because the plug itself is still receiving power. That means you can control it and run schedules normally during a grid outage, but only for the runtime of the battery. This is a common way to keep a router, modem, or a few critical devices smart-controlled during short outages.
Do smart plugs help or hurt during an outage
They neither help nor hurt. They are simply off. The bigger risk is relying on a smart plug for something safety-related, like a heater or a sump pump, without a plan for what happens when it loses power. For those use cases, a plug with state recovery or a non-smart solution is usually more appropriate.
TP-Link Kasa Smart Plug Mini EP25
A compact Wi-Fi plug with scheduling and away mode, and it includes a setting to remember its on/off state after a power loss.
Wyze Plug
A budget Wi-Fi plug that supports schedules and timers through the Wyze app, though it defaults to off after an outage unless configured otherwise.
Frequently asked questions
Do smart plugs work during a power outage?
No. A smart plug needs electricity to run its Wi-Fi radio and relay, so during an outage it is completely dead and cannot be controlled or run schedules.
Will my smart plug turn back on automatically after the power comes back?
Most do power back on and reconnect to Wi-Fi automatically, but many default to the off state rather than resuming whatever was on before. Some models offer a state-recovery setting in the app.
Can I control a smart plug with my phone if the power is out?
No. The plug has no power and no network connection, so the app will show it as offline and any commands will fail until power returns.
Do smart plugs lose their schedules when the power goes out?
Usually not. Schedules are typically stored in the cloud or in non-volatile memory, so they survive the outage. They just do not execute while the plug is unpowered.
What happens to a device plugged into a smart plug during an outage?
It loses power along with the plug, unless the device has its own battery or is connected to a UPS. The smart plug does not provide any backup power.
Is there a smart plug that works without power?
No. A smart plug cannot function without electricity. If you need control during an outage, you need a battery backup or a plug that is itself powered by a battery, which is not a standard product category.
Why does my smart plug show offline after a power outage?
It is likely rebooting and trying to reconnect to Wi-Fi. Give it a minute or two. If it stays offline, check that your router is back up and that the plug is within range.
Can a smart plug help me during a power outage in any way?
Not directly. It cannot generate power or keep devices running. Its only role is to control devices when power is present, so it is not a backup solution.
Do smart plugs with energy monitoring still record data during an outage?
No. Energy monitoring requires the plug to be powered and connected. Data collection stops during the outage and resumes when power returns.
Will a smart plug turn on a space heater after an outage?
Only if it is set to restore its previous state and the heater was on before the outage. Many plugs default to off, so check the app settings if this matters for safety or comfort.
How long does it take for a smart plug to reconnect after power returns?
Typically a few seconds to a minute, depending on the plug and your router. Some plugs take longer if the Wi-Fi network is still booting up.
Can I use a smart plug with a generator?
Yes, as long as the generator provides stable power. The plug will work normally and can be controlled by your phone, but it will not protect equipment from dirty power or surges.
Do smart plugs need a hub to work during an outage?
No. Whether a plug uses Wi-Fi, Bluetooth, or a hub, it still needs power. A hub does not provide backup power to the plug.
What is the best way to keep my smart plug running during an outage?
Plug the smart plug into a UPS or battery backup. That keeps the plug powered so it can maintain its connection and control devices, but only for the runtime of the battery.
Will a smart plug remember its Wi-Fi settings after an outage?
Yes, Wi-Fi credentials are stored in non-volatile memory, so the plug will attempt to reconnect to the same network automatically when power returns.
Can a smart plug cause problems when power returns after an outage?
In rare cases, a surge when power returns can damage the plug or connected devices. Using a surge protector or UPS can help protect both.
Do all smart plugs behave the same way during an outage?
Broadly yes, since all need power to operate. Differences appear in how they handle state recovery and reconnection after power returns.
Is it safe to leave a smart plug plugged in during an outage?
Yes, it is safe. There is no risk from the plug itself being unpowered. Just be aware that any device plugged into it will also be off.
Can I get a notification when my smart plug loses power?
Some smart plugs and hubs can send an alert when a device goes offline, which can serve as a power-loss notification. This depends on the platform and settings.
Our take
A smart plug is a convenience device, not a backup power solution. It will be completely dead during an outage, and while most reconnect automatically afterward, they often default to off. If you need control during a blackout, put the plug on a UPS or look for a model with state recovery, and do not rely on it for anything critical.
Marcus Chen
Marcus covered consumer electronics for enthusiast tech publications for six years before joining ChoiceCrest. He specializes in translating manufacturer spec sheets into plain-language buying advice, with a focus on audio, computing accessories and smart-home gear.
