article Best Smart Plugs with Energy Monitoring 2026 — UK Guide | 247QuickTools
📘 Buying Guide · Home & Energy

💡 Affiliate disclosure: As an Amazon Associate we earn from qualifying purchases at no extra cost to you. Picks below are based on independent research and user reviews, not paid placement.
At a glance — our picks
# Product Best for Rating
1 Tapo P115 Smart Plug with Energy Monitoring ⭐ Best smart plug —/10
2 Brennenstuhl Primera-Line PM 231 Energy Monitor Best standalone monitor —/10
3 Adaptor Pack UK 3-Pin to EU/US Best for travel adapters —/10

The picks in depth

1

Tapo P115 Smart Plug with Energy Monitoring

⭐ Best smart plug

Real-time wattage, daily/weekly/monthly kWh usage, app control, 13A UK plug, voice assistant compatible.

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💡 Editor's note: The Tapo P115 is the best value smart plug with energy monitoring in the UK. The free app shows running costs in £ if you enter your tariff rate.
2

Brennenstuhl Primera-Line PM 231 Energy Monitor

Best standalone monitor

Plug-in monitor showing watts, kWh, running cost. No app or Wi-Fi needed. Works immediately out of the box.

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💡 Editor's note: For a non-smart solution, a standalone energy monitor plugged in between the socket and appliance gives you instant watt readings with no setup.
3

Adaptor Pack UK 3-Pin to EU/US

Best for travel adapters

For international visitors tracking energy usage of appliances across plug standards.

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💡 Editor's note: If you're using appliances from different countries, a good adapter is essential — and worth monitoring separately as some adapters have significant standby draw.

🔧 Free related tools

Tools that pair with this guide — free, no sign-up required.

watts to kilowatts
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kWh to joules
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What to look for

Smart plugs vs standalone monitors: smart plugs let you control appliances remotely and set schedules, plus monitor energy. Standalone monitors are simpler and work without a hub or Wi-Fi. For identifying energy-hungry appliances, either works.

Frequently asked

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Which appliances use the most electricity?

Electric showers (~8-10 kW), immersion heaters (~3 kW), electric ovens (~2-3 kW), tumble dryers (~2.5 kW), and air conditioning (~1-3 kW) are the big users. A gaming PC can use 300-500W while gaming. A TV is typically only 50-150W.

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How much does leaving appliances on standby cost?

Standby typically uses 1-5W per device. At 24p/kWh, a 3W device on standby for a year costs about 63p. The big standby offenders are older TVs (10-15W) and gaming consoles on 'instant-on' mode (70-100W).

Reviewed for 2026. Product recommendations reviewed by a UK-based qualified primary teacher and FA Level 2 coach. All Amazon products link directly to the product page. We earn a commission on qualifying purchases — this does not affect our recommendations.