Shelly Pro 3EM-120A

Shelly Pro 3EM-120A

£139.99

Out of stock

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Overview

Shelly Pro 3EM-120A is a professional DIN-rail-mountable three-phase energy meter designed for high-current installations up to 120A per phase. Built on Gen2 firmware with LAN, Wi-Fi, and Bluetooth connectivity, it provides real-time monitoring of voltage, current, power, and power factor per phase, as well as four-quadrant energy measurement. With photovoltaic readiness, high accuracy, and local data storage, Shelly Pro 3EM-120A is ideal for commercial, industrial, and advanced residential energy monitoring.

Key features

  • DIN-rail-mountable three-phase energy meter
  • Measures up to 120A per phase and neutral
  • Four-quadrant energy measurement with multiple wiring options
  • Real-time voltage, current, power, and power factor per phase
  • Accuracy Class B active energy (IEC 62053-21 compliant per manufacturer)
  • Photovoltaic-ready for monitoring energy production and consumption
  • Phase sequence error detection
  • Optical pulse indication of energy usage
  • Local data storage for up to 60 days at 1-minute resolution
  • LAN, Wi-Fi, and Bluetooth connectivity
  • Supports scripting, MQTT, and advanced automation

Product information

Use cases
  • Three-Phase Energy Monitoring
  • Monitor real-time and historical energy usage across three-phase electrical systems.
  • Solar and Energy Generation Tracking
  • Track photovoltaic energy production and bidirectional energy flow.
  • Commercial and Industrial Installations
  • Deploy in factories, offices, and commercial buildings for accurate, high-current monitoring.
  • Energy Analysis and Optimisation
  • Store and export detailed energy data for auditing, optimisation, and reporting.
Technical specifications
Physical
Size (HxWxD)
94 × 19 × 69 mm (±0.5 mm)
Weight
62 g (±1 g)
Mounting
DIN rail
Shell material
Plastic
Colour
White
Environmental
Ambient temperature
-20°C to +40°C
Humidity
30% to 70% RH
Max altitude
2000 m
Electrical
Power supply AC
110–240 V, 50/60 Hz
Power supply DC
N/A
Power consumption
< 3 W
Sensors and Meters
Temperature sensor
Yes
Voltmeters (RMS per phase)
100–260 V
Voltmeter accuracy
±1 %
Ammeters (RMS via CT)
0–120 A per phase and neutral
Ammeter accuracy
±1 % (2–120 A), ±2 % (1–2 A), ±5 % (0–1 A)
Power and energy measurement
Active and apparent power, active and apparent energy, power factor, fundamental active and reactive energy
No-load threshold
30 VA per phase
Measurement data storage
At least 60 days at 1-minute resolution
Data export
CSV (PQ values), JSON via 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 indoors / 50 m outdoors
Bluetooth protocol
4.2
Bluetooth range
Up to 10 m indoors / 30 m outdoors
MCU
CPU
ESP32-D0WDQ6
Flash
16 MB
Firmware Capabilities
Webhooks (URL actions)
20 (5 URLs per hook)
Scripting
mJS
MQTT
Yes
CoAP
No
What’s included
  • Shelly Pro 3EM energy meter
  • 3 × 120A current transformer clamps

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