Shelly Pro 3EM-400A
Original price
£249.99
-
Original price
£249.99
Original price
£249.99
£249.99
-
£249.99
Current price
£249.99
Availability:
Low stock
Shelly Pro 3EM-400A is a professional DIN-rail-mountable three-phase energy meter designed for very high-current installations up to 400A 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, along with four-quadrant energy measurement. With photovoltaic readiness, high measurement accuracy, and local data storage, Shelly Pro 3EM-400A is ideal for commercial, industrial, and large residential energy monitoring.
Key Features
Use Cases
What’s Included
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
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
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
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): 0–400 A per phase and neutral
Ammeter accuracy: ±1 % (5–400 A), ±2 % (0–5 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
Voltmeters (RMS per phase): 100–260 V
Voltmeter accuracy: ±1 %
Ammeters (RMS via CT): 0–400 A per phase and neutral
Ammeter accuracy: ±1 % (5–400 A), ±2 % (0–5 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
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
Flash: 16 MB
Firmware Capabilities
Webhooks (URL actions): 20 (5 URLs per hook)
Scripting: mJS
MQTT: Yes
CoAP: No
Scripting: mJS
MQTT: Yes
CoAP: No