Shelly Pro 3EM-400A DIN-rail Energy Meter

The Shelly Pro 3EM – 400 is a 3-phase energy meter capable of reporting accumulated energy, real-time voltage, current, and power factor. It can measure up to 400A per phase, including the neutral, with an accuracy of 1%. The device stores data in non-volatile memory, allowing for retrieval of up to 60 days’ worth of data in 1-minute intervals.

£199.13 inc VAT

SKU: PRO-3EM-400A Category:

EAN / Barcode: 3800235268117

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Description

The Shelly Pro 3EM 400-A is a WiFi-operated, DIN-rail mountable 3-phase energy meter featuring WiFi, Bluetooth, and LAN connectivity for flexible and precise energy consumption reporting. It can monitor up to 400A per phase, making it suitable for tracking energy usage across home appliances, electrical circuits, and office equipment.

The Pro 3EM supports MODBUS for easy integration into existing systems and can measure 2-way energy consumption—both produced and consumed—for each of its three phases, making it ideal for installations with renewable energy sources such as solar panels or wind turbines.

A 120A variant, the Shelly Pro 3EM 120A, is also available for monitoring up to 120A per phase.

Product Specifications

Physical and Performance Attributes

Weight1.046 KG
Dimensions (L x W x H)80 × 220 × 120 mm

Misc Product Attributes

Dimensions (HxWxD): 94x19x69 mm / 3.70×0.75×2.71 in
Mounting: DIN rail
Ambient temperature: from -20 °C to 40 °C / from -5 °F to 105 °F
Humidity 30 % to 70 % RH
Max. altitude 2000 m / 6562 ft
Power supply: 110 – 240 VAC, 50/60Hz
Electrical consumption: < 3 W
Internal temperature sensor: Yes
Voltmeters (RMS for each phase): 100 – 260 V
Voltmeters accuracy: ±1 %
Ammeters (RMS via CT for each phase and the Neutral): 0 – 400 A
Ammeters accuracy:
-±1 % (5 – 400 A)
-±2 % (0 – 5 A)
Phase sequence error detection: Yes (option)
Power and energy meters:
-Active and apparent power
-Active and apparent energy
-Power factor
-Fundamental active and fundamental reactive energy
Measurement data storage: At least 60 days of 1 min data resolution
Data export:
-CSV for PQ recorded values
-JSON format export through RPC
Wi-Fi protocol: 802.11 b/g/n
RF band: 2400 – 2495 MHz
Max. RF power: < 20 dBm
Wi-Fi operational range (depending on local conditions):
-up to 50 m / 160 ft outdoors
-up to 30 m / 100 ft indoors
Bluetooth protocol: BLE 4.1
Bluetooth operational range (depending on local construction):
-up to 30 m / 100 ft outdoors,
-up to 10 m / 33 ft indoors
CPU: ESP32
Flash: 16 MB
Webhooks (URL actions): 20 with 5 URLs per hook
Scripting: mJS
MQTT: Yes