Smart power strips cut energy by sensing when a main device is off and then killing power to the peripherals plugged into it.
When you turn off the TV or computer plugged into the strip’s control outlet, the strip senses the drop and shuts down the switched outlets, stopping the phantom loads from the cable box, console, soundbar, and printer that the old setup left drawing power all night. The result is a simple, automatic way to trim standby drain and the cost that comes with it.
What Makes A Smart Power Strip Different From A Regular One?
A regular power strip is just an extension cord with extra sockets; it passes power through whether the attached gear is running or not. A smart strip adds a control or master outlet that monitors the main device’s power draw. When that draw falls below a set threshold — meaning the TV or computer is off or in standby — an internal relay opens and cuts electricity to the strip’s switched, slave, or energy-saving outlets.
Some models go further, using occupancy sensors, timers, or Wi-Fi, Zigbee, or Z-Wave connections to manage outlets on a schedule or from an app. Many also include surge protection, and a few track per-outlet energy use so you can see exactly what each device is consuming.
Where Smart Power Strips Actually Save Money
Smart strips earn their keep on clusters of devices where one primary unit controls the rest. An entertainment center is the classic example: the TV drives the cable box, receiver, game console, and soundbar, so when the TV goes off, all of them can safely lose power too. A desktop-PC setup works the same way, with the computer as the master and the monitor, speakers, and printer as the slaves.
One tested rule of thumb is to use a smart strip on clusters pulling more than about 15 watts of idle load. Older AV equipment with higher standby draw produces the biggest wins; modern devices that sip only a watt or two in standby may show negligible savings. For a quick home-energy audit, turn everything in a cluster off, watch the meter or your smart-home baseline, then plug the cluster back in to see what its idle draw actually is.
Setting Up A Smart Power Strip The Right Way
Setup takes a few minutes, but the details decide whether the strip actually helps.
- Plug the main device — the TV, computer, or receiver — into the control or master outlet.
- Plug the peripherals that should power down with it — cable box, console, monitor, speakers, printer — into the switched or energy-saving outlets.
- Set the sensitivity threshold if your model has one, so the strip reliably detects when the master device is truly off rather than just idle.
- Leave critical gear alone. Routers, modems, medical devices, and anything that must stay powered continuously belong on an always-on outlet, never a switched one.
If you are ready to buy, our roundup of the best energy saving power strips covers top models for home theater and desktop setups. Just match the strip to your cluster, keep it within its rated load, and let the relay do the rest.
Common Mistakes And What They Cost You
The biggest mistake is plugging something into a switched outlet that must never lose power — that is how a router drops your whole network or a DVR misses a recording. The second is expecting big savings from gear that already idles near zero; a smart strip cannot invent standby draw that is not there. Setting the threshold too high trips the strip off while the master device is still working, while a threshold set too low means it never shuts off at all. And remember that surge protection does not make a strip suitable for high-current appliances — stay within the strip’s rating and intended load.
FAQs
Do smart power strips work with any TV or computer?
Yes, they work with virtually any device that has a meaningful standby draw. The strip simply senses when the master device’s power consumption drops, so there is no special compatibility requirement. Older equipment with higher idle draw produces the most noticeable savings.
Can I plug a smart strip into another surge protector?
You can, but it is not recommended. Daisy-chaining strips can overload a single wall outlet and may void the surge protection on both units. Plug the smart strip directly into a wall outlet that can handle the combined load of everything attached to it.
Will a smart strip save money if my devices have very low standby power?
Probably not much. If your TV and peripherals draw only a watt or two when idle, the annual savings may be under a few dollars.
References & Sources
- Reliant. “Smart Power Strips: A Guide to Cutting Standby Power.” Explains how control outlets work and typical savings estimates.
- We Energies. “Save Energy with Smart Power Strips.” Utility guidance on phantom loads and the $100-per-year household estimate.
- Business Energy Advisor. “Smart Power Strips.” Covers load-sensing operation, best-use cases, and measured savings ranges.
Mo Maruf
I created WellFizz to bridge the gap between vague wellness advice and actionable solutions. My mission is simple: to decode the research and give you practical tools you can actually use.
Beyond the data, I am a passionate traveler. I believe that stepping away from the screen to explore new environments is essential for mental clarity and physical vitality.