Best Smart Energy Monitors UK 2026
Most UK households pay 20-40% more on electricity than they need to because they can't see what's costing them. A smart energy monitor shows real-time usage room-by-room or circuit-by-circuit — and the first week of data usually reveals an always-on device eating £100-300/year.
Why it matters
Your smart meter tells you how much electricity you used yesterday. An energy monitor tells you how much is being used right now, by what, at what cost. That's the difference between knowing you're overspending and being able to fix it.
How we chose
- Real-time data resolution (sub-minute, not hourly)
- No subscription required for core features
- Circuit-level vs whole-house clamping
- Export data (CSV, Home Assistant, MQTT)
Our picks
Hugo Smart Energy Monitor
UK-designed, works with every UK smart meter via IHD pairing. Real-time display, phantom-load alerts, app history. No subscription.
Best for: UK smart meter households — easiest install.
Check latest price on Amazon UKShelly EM (Energy Monitor)
Two-circuit CT-clamp monitor. Publishes via MQTT / REST to Home Assistant, Node-RED, Grafana. Cheapest circuit-level option.
Best for: DIY smart-home households with a Home Assistant or similar stack.
Check latest price on Amazon UKEfergy Engage Hub Kit
Clamp meter + cellular hub. 30-second resolution, good cloud history. Pre-smart-meter option.
Best for: Households without a smart meter.
Check latest price on Amazon UKEmporia Vue (3-Phase)
16-circuit energy monitor — one CT clamp per circuit breaker. See exactly what each zone of your house is costing.
Best for: Bigger homes and solar/EV charger owners.
Check latest price on Amazon UKOur verdict
Hugo for simplicity with a UK smart meter. Shelly EM if you're already running Home Assistant. Emporia Vue if you want panel-level detail and have the DIY skills.