Shelly Pro EM 50A DIN-Mountable Single-Phase Energy Meter with Contactor Control

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

Specifications

Power

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

• 3.70x0.75x2.71 ±0.02 in