Advanced dual‑channel single‑phase energy meter for precise consumption monitoring. Offers Wi‑Fi/LAN connectivity, real‑time measurements (voltage, current, active and apparent power, power factor), and 60‑day internal memory. Integrates via MQTT/HTTP/WebSocket, uses secure TLS transport, mounts on a DIN rail, and includes a built‑in web interface for easy setup.
SHELLY Pro EM‑50 gives you full control over energy consumption in homes and commercial sites. Dual‑channel single‑phase metering with accuracy up to ±1% lets you monitor voltage 100–260 V, current 0–50 A (via CT), active and apparent power, and power factor in real time. Thanks to non‑volatile memory, you have a 1‑minute‑resolution history for up to 60 days.
The device works reliably locally over LAN and Wi‑Fi, with simple setup via the built‑in web interface. For smart‑home and industrial integrations it supports MQTT, HTTP, and WebSocket; all incoming connections are protected by TLS. Scripting and webhooks are supported for advanced automation and easy data export.
- Dual‑channel single‑phase metering 0–50 A per channel (CT)
- Measurements: voltage 100–260 V, current, active/apparent power, power factor
- Measurement history: min. 60 days, 1‑min resolution
- Connectivity: LAN, Wi‑Fi, Bluetooth 4.2 (pairing)
- Integration and security: MQTT/HTTP/WebSocket, TLS
- Data export: CSV (PQ values), JSON via RPC; webhooks
- Mounting on DIN rail, compact dimensions 94 × 19 × 69 mm
- Internal temperature sensor, low self‑consumption < 3 W
- Operating conditions: −20 to 40 °C, 30–70% RH; Wi‑Fi range up to 30/50 m (indoors/outdoors)
Specifications
- Manufacturer
- Shelly
- Model
- Pro EM‑50
- Dimensions
- 94 × 19 × 69 ±0.5 mm
- Weight
- 63 ±1 g
- Mounting
- DIN rail
- Enclosure material
- Plastic
- Color
- White
- Ambient temperature
- −20 °C to 40 °C
- Humidity
- 30% to 70% relative humidity
- Maximum altitude
- 2000 m
- AC supply voltage
- 100–260 V, 50/60 Hz
- Power consumption
- < 3 W
- Max switching AC voltage
- 240 V
- Max switching current
- 2 A
- Internal temperature sensor
- Yes
- Voltmeter (RMS)
- 100–260 V
- Voltmeter accuracy
- ±1%
- Ammeters (RMS using CT)
- 0–50 A
- Ammeter accuracy
- ±1% (5–50 A), ±2% (0–5 A)
- Power and energy measurement
- Active and apparent power, active and apparent energy, power factor
- No‑load threshold
- 30 VA per phase
- Measured data storage
- At least 60 days with 1‑min data resolution
- Data export
- CSV for recorded PQ values, JSON export via RPC
- Wi‑Fi range
- Up to 30 m indoors and 50 m outdoors (depends on local conditions)
- Bluetooth protocol
- 4.2
- Bluetooth range
- Up to 10 m indoors and 30 m outdoors (depends on local conditions)
- CPU
- ESP32‑D0WDQ6
- Flash memory
- 16 MB
- Webhooks (URL sharing)
- 20 with 5 URLs per hook
- Scripts
- Yes
- MQTT
- Yes
- CoAP
- No
- LAN connection
- Yes
- Transport security
- TLS
- Integrations
- MQTT, HTTP, WebSocket
