rel="sponsored nofollow"), we may earn a small affiliate commission from Amazon UK at no extra cost to you. See our Affiliate Disclosure and BS 1363 Testing Methodology.If your British household is on a dual-rate Economy 7 meter, an EV tariff like Octopus Go / Intelligent Octopus Go (typically 7p–8.5p/kWh overnight), or half-hourly Octopus Agile, shifting flexible loads out of the 16:00–19:00 peak window cuts appliance running costs by up to 70%. Using the energy-monitoring picks from our best smart plugs UK guide, here is how to automate off-peak shifting safely.
At-a-Glance UK Specification & Price Comparison
All models below feature a native UK Type G three-pin plug or socket conforming to BS 1363 (230V–240V AC, 50Hz) and have been evaluated for British double wallplate clearance, standby wattage, and local network reliability:
| Load / Use Case | Best Off-Peak Window (UK) | Annual Saving vs Peak Rate | Recommended Smart Plug |
|---|---|---|---|
| E-Bike / Scooter / Tool Battery Charging | 01:00 – 04:30 (with 3.5h Auto-Off) | ~£18 – £35 / year + battery longevity | Tapo P110M — £11.99 (Amazon UK) |
| Dehumidifier / Laundry Drying (Utility Room) | 00:30 – 05:30 Off-Peak Window | ~£65 – £95 / year | Tapo P110M — £11.99 (Amazon UK) |
| 16:00–19:00 Peak Cut-Off (Media/Office Standby) | Auto-Off during 16:00–19:00 if unused | ~£25 – £40 / year on Agile | Tapo P304M Strip — £36.99 (Amazon UK) |
1. Configuring Dual-Rate Tariffs Inside the Tapo App (GBP £)
Open the Tapo app, select your Tapo P110 or Tapo P110M, tap Energy Monitoring → Electricity Tariff, and switch from “Single Rate” to Time-of-Use / Dual Rate. Enter your cheap overnight unit rate (e.g. `8.5p/kWh` between `00:30` and `05:30`) and your standard daytime rate so your monthly cost graphs reflect true UK billing.
How We Test (UK BS 1363 Workbench Protocol)
Our evaluation protocol is specifically designed around British domestic electrical standards rather than generic international spec sheets:
- Twin Wall Socket Clearance (BS 1363-2): We fit each plug into a standard UK MK Logic Plus and BG Nexus double switched wall socket to verify that a casing width of 52–57 mm leaves the adjacent socket and individual rocker switches completely unobstructed.
- True-RMS Standby & Relay Wattage: Using a calibrated 230V/50Hz inline wattmeter (0.1W resolution), we log 24-hour parasitic power consumption both with the relay open (Wi-Fi/Thread listening) and with the relay closed (energised coil + status LED).
- Thermal Pin & Load Verification: While a BS 1363 fuse is rated to 13A (2,990W at 230V), we monitor brass pin temperature after 60 minutes under sustained 2,200W resistive load and verify over-current auto-shutoff behaviour in the companion firmware.
- UK ISP Router & Offline Timer Resilience: We test 2.4 GHz onboarding on merged SSIDs (BT Smart Hub 2, Sky Max Hub, Virgin Media Hub 5) and disconnect the WAN fibre cable to confirm whether scheduled timers and local Matter/Thread automations still execute on time.
Using Home Assistant’s Octopus Energy integration to trigger my Tapo P110M whenever Octopus Agile drops below 10p/kWh has been a game changer for running our utility room dehumidifier.
That is the ultimate UK smart home setup Phil! Combining the local TP-Link Matter/Tapo integration in Home Assistant with Octopus Agile half-hourly price entities automates negative and ultra-low pricing windows effortlessly.