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The Shelly Pro EM-50 is a DIN rail mountable two-channel, single-phase energy meter. It has an integrated relay with dry contacts for contactor control.
- LAN, Wi-Fi and Bluetooth connection for high security and reliability
- Reports accumulated energy, as well as instantaneous voltage, current, active and apparent power per phase in real-time
- Power metering – two independent measurement channels on the same phase
- 4 Quadrant measurement with optical pulse indication of energy usage
- Can be used with contactors for bigger loads
- Accuracy Class B (IEC 62053-21)
- Photovoltaic ready
- Stores data in non-volatile memory that can be retrieved for a period of up to 60 days in 1-minute intervals.
- No hub required! Easy control through the Shelly Smart Control app, most platforms and protocols, as well as voice assistants. Use it with Alexa, Home Assistant, or your preferred automation system.
- Supports scripting, web hooks, MQTT, WebSocket, HTTPS, UDP, TLS, custom certificates & Modbus TCP protocol
*Package includes 2 pieces of 50 A Current Transformers
- Power supply voltage AC 110-240V, 50/60Hz
- Power consumption < 3W
- Max switching voltage AC 240V
- Max switching current 2A
- Power metering 2 channels, up to 50A each
Features
- Mounting DIN rail
- Voltmeter (RMS) 100-260V
- Voltmeters accuracy ±1%
- Ammeters (RMS via CT) 0-50A
- Ammeters accuracy • ±1% (5-50A)
• ±2% (0-5A)
- Power and energy meters • Active and apparent power
• Active and apparent energy
• Power factor
- No load threshold 30VA per phase
- Measurement data storage At least 60 days of 1 minute data resolution
- Data export • CSV for PQ recorded values
• JSON format export through RPC
- Webhooks (URL actions) 20 with 5 URLs per hook
- Scripting Yes
- MQTT Yes
- CoAP No
- Internal-temperature sensor Yes
- Ambient temperature -20°C to +40°C / -5°F to +105°F
- Humidity 30% to 70% RH
Connectivity
- Wi-Fi protocol 802.11 b/g/n (2.4 GHz)
- Wifi range (depending on local construction) • up to 50m outdoors
• up to 30m indoors
- RF band 2400-2495 MHz
- Max. RF power <20 dBm
- Bluetooth protocol 4.2
- Bluetooth range (depending on local construction) • up to 30m outdoors
• up to 10m indoors
Dimensions
- (H x W x L) • 94x19x69 ±0.5 mm
• 3.70×0.75×2.71 ±0.02 in
