Shelly Pro EM-50 WiFi relay electricity meter 1-phase 2x 50A + 2 terminals measuring function

Article description:

Smart WiFi electricity meter for 2 phases

Shelly Pro EM-50 is a single-phase, dual-channel, DIN rail mounted energy meter. It has an integrated switch with potential-free contacts for contactor control.

Your intelligent solution for precise energy monitoring and control: Shelly Pro EM-50A is a DIN-mountable 1-phase energy meter with an integrated switch for contactor control. With an accuracy of 1% in measuring active energy, the Shelly Pro ЕМ-50 can be used to monitor consumption and control any household appliances, circuits and office equipment. The device has a data history of 60 days in 1 minute intervals. In addition, its scripting capabilities enable the execution of complex scenes and provide more comprehensive monitoring capabilities.

Home Renewable Energy Ecosystem: If you have a photovoltaic (PV) system at home, the Shelly PRO EM-50 can help you measure grid and imported energy from renewable sources. It also has configurable load control, which allows you to redirect excess energy from renewable sources to electronic devices in your home and thus optimize your energy consumption. This way, for example, you can use the Shelly PRO EM-50 to charge your car or household appliances when your PV system generates excess energy.

Perfect for SMB Owners: If you own a small or medium-sized business, you've probably struggled with excessive energy consumption at some point. Some machines and devices are switched on all the time. With the Shelly PRO EM-50 you can measure and reduce consumption with the highest precision by turning off consumers such as water dispensers, laminators and lights at night. The smart device can also be used for preventive measurements by monitoring the abnormal behavior of HVAC systems, air compressors, refrigerators and other devices.

- LAN, WLan and Bluetooth connection for high security and reliability

- Displays the accumulated energy as well as the instantaneous values ​​of voltage, current, active and apparent power per phase in real time.  

- Power measurement - two independent measurement channels for the same phase

- 4-quadrant measurement with optical pulse display of energy consumption

- Measuring accuracy class B (IEC 62053-21)

- Suitable for photovoltaics

- Stores the data in non-volatile memory that can be accessed at 1-minute intervals for up to 60 days.  

- No hub required! Easy control via the Shelly Smart Control app, most platforms and protocols, and voice assistants. Use it with Alexa, Home Assistant or your favorite automation system.  

- Supports scripting, webhooks, MQTT, WebSocket, HTTPS, UDP, TLS and custom certificates & Modbus TCP protocol

Technical data:

PROPERTIES

Size (HxWxD): 94x19x69 ±0.5 mm

Weight: 63 ±1 g

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)

Length of stripped conductor: 6 to 7 mm / 0.24 to 0.28 in

Casing material: Plastic

Color: White

ENVIRONMENT

Ambient temperature: -20 °C to 40 °C

Humidity: 30% to 70% RH

Max. Altitude: 2000 m

CONNECTION

Supply voltage AC: 110 - 240 V, 50/60 Hz

Supply voltage DC: N/A

Device's own consumption: < 3W

Max. Switching voltage AC: 240 V

Max. Switching voltage DC: N/A

Max. Switching current: 2 A

SENSORS, MEASUREMENT DEVICES

Internal temperature sensor: Yes

Voltage meter (RMS): 100 - 260 V

Accuracy of voltage meter: ±1%

Current measuring devices (RMS via CT): 0 - 50 A

Accuracy of current meters: ±1% (5 - 50 A), ±2% (0 - 5 A)

Power and energy counter: active and apparent power, power ratio

No load threshold: 30 VA per phase

Storage of measurement data: At least 60 days with data intervals of 1 minute

Data export: CSV for recorded PQ values, JSON format export via RPC

CONNECTIVITY

RF band: 2400 - 2495 MHz

Max. RF power: <20 dBm

WLAN protocol: 802.11 b/g/n

Wi-Fi range: Up to 30 m indoors and 50 m outdoors (depending on local conditions)

Bluetooth protocol: 4.2

Bluetooth range: Up to 10 m indoors and 30 m outdoors (depending 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

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