Smart Plug Ideas: 18 Practical Uses (and What Not to Plug In)

The most useful smart plug ideas fall into four groups: putting lamps and lights on schedules, cutting standby power to devices you leave plugged in, using countdown timers so things switch themselves off, and measuring what individual appliances cost. Below are 18 practical uses with the feature each one relies on, followed by the appliances you should never put on a smart plug. One rule runs through all of them: check that the appliance's wattage is within the plug's rating, and plug the smart plug straight into a wall socket.

Before you start: two quick checks

1. Does the appliance resume when power returns? A smart plug can only supply or cut power. Lamps, fans and heaters with a mechanical switch left "on" come back on. Many devices with touch buttons stay off, so a schedule can switch them off but not on.
2. Is it within the plug's rating? Multiply amps by about 230 V for the maximum watts. A 13 A plug is roughly 2,990 W, a 16 A plug roughly 3,680 W. Leave headroom for anything that runs at high power for long periods.

Lighting ideas

1. Lamp on at dusk, off at bedtime

The classic. Schedule a living room lamp to come on in the evening and off at midnight. Adjust the schedule as the seasons change.

2. Make the house look occupied while you're away

When you travel, schedule one or two lamps to come on in the evening and off at a realistic bedtime. Vary times slightly across rooms if your app allows several schedules.

3. Holiday lights on a timer

Indoor festive lights on for the evening, off overnight, without crawling behind the tree. Keep indoor smart plugs indoors unless the plug is specifically rated for outdoor use.

4. Hard-to-reach lamps

A lamp behind a sofa or on a high shelf becomes a tap in the app, a home-screen widget or a voice command.

5. Plant grow lights

Give seedlings or houseplants a consistent daily light period with an on and off schedule.

Saving energy and cutting standby

6. TV and entertainment unit off overnight

TVs, soundbars, set-top boxes and consoles often draw power in standby around the clock. A schedule that cuts the whole unit (via a single wall socket, not a chain of extensions) from, say, 1 am to 4 pm on weekdays removes that drain. If something needs overnight power for updates or recordings, leave it out. Our standby power guide explains which devices are worth it.

7. Home office off at the end of the workday

Monitor, speakers, desk lamp and printer off at 7 pm and all weekend. Shut a desktop PC down properly first; cutting power to a running computer risks losing work.

8. Phone and laptop chargers on a countdown

Set a countdown of a few hours when you plug in at night so the charger isn't left powered all day.

9. Run flexible loads at cheaper times

On a time-of-use or dynamic tariff, a schedule can run a dehumidifier or similar device in cheaper hours. For washing machines and dishwashers, use the appliance's own delay-start, since most won't restart themselves when power returns. See how to save electricity at home in Europe for how these tariffs work.

10. Do an appliance energy audit

With an energy-monitoring plug, spend a week on each suspect: the old fridge in the garage, the gaming PC, the dehumidifier. Note kWh and cost, then decide what to change. Our guide to what uses the most electricity at home suggests where to start.

11. Find the true cost of one appliance

Leave the plug on a single appliance for a full cycle or a full week to get its real kWh, rather than multiplying label watts by hours. How to calculate appliance running cost shows what to do with the numbers.

Family and routine ideas

12. Games console time limits

Schedule power to a console only during allowed hours, and turn on the child lock so the plug's button can't be used to override it. Set the cut-off for after the console should already have been shut down, because pulling power mid-save or mid-update can cause problems, and use the console's own parental controls too.

13. Share control with the household

Family sharing lets others in the home control a plug from their own account, without you handing over your login.

14. Scenes for routines

A "Movie" scene that switches off the big lamp and switches on a light strip; a "Goodnight" scene that turns everything off at once. Add it to Alexa or Google Home for voice control.

15. Fans on a countdown

In summer, a bedroom fan that switches itself off after an hour. Inching mode (an automatic off a set time after switching on) does a similar job for short bursts.

Comfort and peace-of-mind ideas

16. Heater off as a backstop

If your heater's manual allows external switching and its wattage is comfortably within the plug's rating, a bedtime off-schedule or a countdown timer stops it running all night by accident. Read our space heater running cost guide first; it covers the safety rules in detail.

17. Remote check that you switched something off

Left the house unsure about the hair dryer or the heater? The app shows whether the plug is on and how many watts it's drawing, and you can switch it off remotely.

18. Keep things running after a power cut

Power-outage memory restores the plug's previous state after a cut. That's useful for a garage freezer you only want monitored, never switched off.

Quick reference

What not to plug into a smart plug

This is the part that matters most.

1. Anything above the plug's rating. Check the appliance's maximum wattage against the plug's amps. High continuous loads such as heaters need headroom.
2. Appliances whose manual forbids timers or external switches. Many heater manuals carry this warning. If yours does, don't use a smart plug with it.
3. Through extension leads, adaptors or multi-way strips. Never daisy-chain. Smart plug into a wall socket; appliance into the smart plug.
4. Medical or life-support equipment, or anything where an unexpected switch-off could hurt someone.
5. Things that must stay on, if you intend to schedule them off: fridges, freezers, aquarium filters and heaters, sump pumps. Monitoring them is fine; switching them off isn't.
6. Heat appliances you'd switch on remotely: irons, hair straighteners, toasters, kettles, cooking appliances. Never turn these on when nobody is there.
7. Bathrooms and outdoors, unless the plug is rated for those locations.
8. Computers and network storage that need a proper shutdown, unless they've already been shut down.

Common mistakes

• Expecting it to press a touch button. It can't; it only supplies power.
• Scheduling a router off and losing control. Plugs that store schedules on the device keep running offline, but you won't have remote access while the internet is down.
• Forgetting the schedule is there. Name plugs clearly so the household knows why the lamp keeps switching off.
• Measuring for a day and drawing conclusions. Give cycling appliances a full week.

Where Wattly fits

The Wattly smart plug covers every idea above: schedules, countdown timers, inching mode, scenes, if-this-then-that style automations in the app, child lock, power-outage memory, family sharing, a home-screen widget and a physical button. It adds energy monitoring with live watts, cost per hour, day, week or month, and daily to yearly history. Schedules stored on the plug keep running without internet. It works with Alexa and Google Home and with Siri via Siri Shortcuts. It comes in EU Type F (16 A or 20 A) and UK Type G (13 A) versions, and its own standby draw is under 1 W.

It won't help with hard-wired appliances, and it only saves money if you act on what it shows; read do smart plugs save money for the honest view. Setting one up? Start with our Tuya smart plug setup guide, or see the Wattly smart plug and current price.