Shelly Pro EM-50

What is Shelly Pro EM-50?

DIN rail mountable two-channel, single-phase energy meter with an integrated switch for contactor control. Control and monitor the consumption of any home appliances, electric circuits and office equipment.
Key Features

  • 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

 

VIEW SPECIFICATIONS  SHELLY MOBILE APP

Features

Wi-Fi, LAN and Bluetooth connectivity

Simultaneous Ethernet and Wi-Fi usage. MQTT, inbound and outbound WebSocket, UDP, mTLS support.

MODBUS support

Allows for easy and fast deployment in existing industrial installations.

Integrated switch

2 A dry contacts switch for contactor control.

Accuracy class B (active energy)

Shelly Pro EM-50 has a measurement accuracy of 1%.

Power measurement

Monitors two independent channels on the same phase.

Scripting

Shelly Pro EM-50 fully supports mjS scripting, allowing you to create further features and functionalities.

Use Cases

Perfect for SMB owners

If you are a small or medium-sized business owner, you have probably struggled with energy overconsumption. Some machines and appliances are switched on all the time. With Shelly PRO EM-50, you can measure with utmost precision and reduce consumption by turning off load - water dispensers, laminating machines and lighting, during the night. The smart device can also be applied for preventative measurement by monitoring for abnormal behaviour of HVAC, air compressors, refrigerator units and others.

Renewable energy ecosystem at home

If you have a photovoltaic system (PV) at home, Shelly PRO EM-50 can help you measure grid and imported energy from renewable sources. Moreover, it has configurable load control, which allows you to redirect any excess energy generated from renewable sources to electronic devices at your home and optimize your energy consumption. For example, you can use Shelly PRO EM-50 for charging your car or home appliances when your PV system provides excess energy. ​

Installation of Shelly devices must be done by a qualified electrician or authorised installers.

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Wiring Diagrams

Specifications

Type

Value

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:

100 - 260 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

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

Download the Shelly Cloud app for Android and iOS

Download Shelly Cloud App on Apple App StoreDownload Shelly Cloud App on Google Play store

Shelly Pro EM-50 – Installation Video