Demo video: https://youtu.be/8yuEt974MRc
Device: Refoss EM06P (6-channel DIN-rail energy monitor with CT clamps)
Integration used: Refoss (official Home Assistant integration, LAN discovery)
What is it & why it’s interesting
EM06P is a 6-channel energy monitor for your breaker panel. Each channel (up to 120 A) reports power (W), current (A), voltage (V), and power factor, and you can merge channels for totals (e.g., whole-home or 3-phase loads). It has a local web UI and an Open API (HTTP JSON-RPC + MQTT) for power users. Accuracy is listed at ±1% with minute-level data views.
Works with the official Refoss integration
The device is discovered locally on your LAN by Home Assistant’s Refoss integration. Steps:
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In Home Assistant, go to Settings → Devices & services → Add integration.
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Search for Refoss and follow the prompts.
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Make sure EM06P is on the same network; the integration uses local LAN discovery
What you’ll see in Home Assistant
Per-channel: power, current, voltage, power factor
Optional total/merged power
Entity naming follows Device Name + channel number (e.g., em06p → em06p, em06p-1, em06p-2, …). You can rename entities as you like.
Energy Dashboard (kWh)
If your firmware exposes energy (kWh) entities, add them directly to Settings → Dashboards → Energy.
If you only have power (W), create derived energy sensors using the Integration helper.
Wiring & safety
Working in a breaker panel is dangerous. If you’re not fully confident, hire an electrician. Ensure CT clamps are fully closed and oriented correctly; if readings are negative, flip the clamp orientation. (This is a common gotcha during initial setup.)
