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Best plug in energy monitor

Updated: October 2026

You want one plug for a kettle or a dehumidifier, and the star ratings on the shelf also belong to clamps and a £109.99 hardwired monitor. The best plug in energy monitor, inside this amazon.co.uk set, is a choice among socket meters only. Our [energy meter comparison](/hub/measuring-equipment/energy-meter) holds all twelve listings. This page names a top pick and a best value for one appliance, then says who should leave the plug group. It does not teach you how to type a tariff. Products Compared read the listing lines on 16 October 2026 and did not run a lab test.

You want one plug for a kettle or a dehumidifier, and the star ratings on the shelf also belong to clamps and a £109.99 hardwired monitor.

Our top picks

SONOFF SONOFF POWCT clamp power meter

Best overall

SONOFF SONOFF POWCT clamp power meter
9.0/10about £29.91
View offer
Tapsin Tapsin energy monitor plug

Rank 2

Tapsin Tapsin energy monitor plug
9.0/10about £13.99
View offer
Awootsv Awootsv PM04UK-1 power meter plug

Preis-Tipp

Awootsv Awootsv PM04UK-1 power meter plug
9.0/10about £11.99
View offer
On this page
  1. 1.Top pick for a single appliance
  2. 2.Best value
  3. 3.When the top pick is the wrong tool
  4. 4.What we did not test

Top pick for a single appliance

The top pick is the Tapsin energy monitor plug at £13.99 with 4.5 from 92 reviews. It is a UK plug with a backlight of about five seconds, and a backup battery is claimed. The star line matches the Awootsv, and the screen can be read in a cupboard for those few seconds. The bullets state a cut-off at 3680 W. At 230 V that is 16 A, while a BS 1363 fuse is 13 A, about 2,990 W. A UK review says the cost display reaches 99.99 and rolls back to zero. Write the kilowatt-hours down. Skip the Tapsin for a whole house, a solar feed, or a figure on an invoice.

Best value

The best value is the Awootsv PM04UK-1 at £11.99 with 4.5 from 86 reviews. The listing says it alarms and disconnects above 13 A. That cut-off sits next to a UK plug fuse in a way the 3680 W headlines do not. A UK review says it keeps the unit price. There is no backlight, so a socket behind a fridge is a poor place for this meter. The KETOTEK KTEM02UK is 4.3 from 113 and states 2900 W / 13 A, but it is £18.99 and still has no backlight. That is a larger file at a higher price, not a better value.
SONOFF SONOFF POWCT clamp power meter

Testsieger

SONOFF SONOFF POWCT clamp power meter
9.0/10about £29.91
View offer

When the top pick is the wrong tool

A plug cannot see the cooker, the lighting, or the standing charge. The SONOFF POWCT is the clamp here, 4.5 from 246 reviews at £29.91, with a stated 100 A. Fitting it is electrical work. Its relay is 2 A for a contactor, not a 100 A switch. The POFET title says 80 A and a bullet says a 10 mm opening. The Emporia Vue 3 is £109.99 and hardwired, and a UK review reports dollar figures. A renter who cannot open the board stays with a socket meter. The wider fork is the electricity usage monitor buying guide.

What we did not test

We did not plug these meters into a calibrated load, and we did not compare them with a supplier meter. A qualifying purchase through our links can earn a commission at no extra cost to you. We will not say the Tapsin is safe at 3680 W. If a meter smells hot, unplug it. If you are still unsure whether the job is a plug or a cable, read plug in energy monitor or CT clamp before you order the Tapsin out of habit.

Common questions

Which plug should I buy if I only want one?
Buy the Tapsin if you want the top pick in this plug-in group: £13.99, 4.5 from 92, and a backlight. Buy the Awootsv if you want the best value at £11.99 with the same star line and a stated 13 A disconnect, and you can read an unlit screen. Neither one measures the whole house. Both need your own pence-per-kWh figure before the cost line means anything.
Is the cheapest listing the best value?
No. LOWENERGIE is £11.79, twenty pence under the Awootsv, and the saved listing has no aggregate star line. Best value here means the cheaper of the two 4.5-star plugs, with a 13 A cut-off stated, not the lowest penny price in the folder. A missing star line is a reason to hesitate, not a hidden bargain we can rank.
Why not the product with the most reviews?
The POFET has 380 reviews, the largest count in the set, at 3.8 stars. It is a clamp, the opening is stated at 10 mm, and it measures one direction. Review volume answers a different question from which plug should go on the kettle. Among plugs, the KTEM02UK has 113 reviews. The Tapsin and Awootsv still lead on the 4.5 line.
Does a backlight matter?
It matters when the socket is in a cupboard or behind an appliance and you need to read watts without a torch. The Tapsin states about five seconds of light. The Awootsv states none. In a bright utility room the missing light is a fair trade for £11.99. In a dark gap behind a freezer it is the reason to spend the extra.
Is 4.8 from five reviews a better meter?
No. The Jadeshay DIN-rail meter is 4.8 from five reviews. Five ratings can move a whole star when one person changes their mind. It is also the wrong shape for a socket. The Tapsin's 4.5 from 92 is the plug-in line we used. A thin 4.8 does not outrank it.
What if I need the whole house, not one kettle?
Leave the plug group. Look at the SONOFF clamp if a competent person can fit a circuit monitor, and read the Emporia listing only if you have already planned a hardwired install and checked whether the app shows pounds. A plug on the kettle will stay silent while the oven runs. The buying guide sets out that fork in full.

Related pages

How to use an electricity usage monitor

Energy meter

Electricity usage monitor buying guide for UK homes

Plug in energy monitor or CT clamp: which one fits

How to calculate appliance running cost in a UK home

Sources

Public UK sources on the price cap, trade meters, notifiable electrical work and competence. Shelf prices, stars and review counts are the amazon.co.uk lines in the twelve listings dated 16 October 2026. Prices move.

  1. Ofgem, energy price cap 1 October to 31 December 2026 (retrieved 16 October 2026)
  2. Ofgem, energy price cap unit rates and standing charges (retrieved 16 October 2026)
  3. GOV.UK, Measuring Instruments Regulations 2016, Great Britain (retrieved 16 October 2026)
  4. Measuring Instruments Regulations 2016, SI 2016/1153 (retrieved 16 October 2026)
  5. GOV.UK, building work, replacements and repairs (retrieved 16 October 2026)
  6. HSE, electrical safety introduction (retrieved 16 October 2026)
  7. Electricity at Work Regulations 1989, regulation 16 (retrieved 16 October 2026)
  8. Which?, energy monitors and measuring power use (retrieved 16 October 2026)