Shelly Pro EM 2x50A
Wi-Fi Energy Meter with Contactor Control
Shelly Pro EM-50 is a DIN rail mountable two-channel, single-phase energy meter. It has an integrated switch 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, webhooks, MQTT, WebSocket, HTTPS, UDP, TLS and custom certificates & Modbus TCP protocol
*Package includes 2 pieces of 50 A Current Transformers
Specifications:
| Physical | |
|---|---|
| Size (HxWxD): | 94x19x69 ±0.5 mm / 3.70x0.75x2.71 ±0.02 in |
| Weight: | 63 ±1 g / 2.22 ±0.05 oz |
| Mounting: | DIN rail |
| Screw terminals max torque: | 0.4 Nm / 4.43 lbin |
| Conductor cross section: | 0.5 to 2.5 mm² / 20 to 14 AWG (solid, stranded and bootlace lugs) |
| Conductor stripped length: | 6 to 7 mm / 0.24 to 0.28 in |
| Shell material: | Plastic |
| Color: | White |
| Environmental | |
| Ambient temperature: | -20 °C to 40 °C / -5 °F to 105 °F |
| Humidity: | 30 % to 70 % RH |
| Max. altitude: | 2000 m / 6562 ft |
| Electrical | |
| Power supply voltage AC: | 110 - 240 V, 50/60 Hz |
| Power supply voltage DC: | N/A |
| Power consumption: | < 3 W |
| Output circuits ratings | |
| Max switching voltage AC: | 240 V |
| Max switching voltage DC: | N/A |
| Max switching current: | 2 A |
| Sensors, meters | |
| Internal-temperature sensor: | Yes |
| Voltmeter (RMS): | 100 - 260 V |
| Voltmeters accuracy: | ±1 % |
| Ammeters (RMS via CT): | 0 - 50 A |
| Ammeters accuracy: | ±1 % (5 - 50 A), ±2 % (0 - 5 A) |
| Power and energy meters: | Active and apparent power |
| Active and apparent energy | |
| Power factor | |
| No load threshold: | 30 VA per phase |
| Measurement data storage: | At least 60 days of 1 min data resolution |
| Data export: | CSV for PQ recorded values |
| JSON format export through RPC | |
| Radio | |
| RF band: | 2400 - 2495 MHz |
| Max. RF power: | <20 dBm |
| Wi-Fi protocol: | 802.11 b/g/n |
| Wi-Fi Range: | Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors |
| (Depends on local conditions) | |
| Bluetooth Protocol: | 4,2 |
| Bluetooth Range: | Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors |
| (Depends on local conditions) | |
| MCU | |
| CPU: | ESP32-D0WDQ6 |
| Flash: | 16 MB |
| Firmware capabilities | |
| Webhooks (URL actions): | 20 with 5 URLs per hook |
| Scripting: | Yes |
| MQTT: | Yes |
| CoAP: | No |
Warranty and Support:
Warranty inquiries and troubleshooting via the Shelly-Support-Ticketsystem