SHELLY PRO 3EM.
Professional 3-phase energy monitoring.
4-quadrant measurement
Measure capacitive and inductive load types of active imported and exported energies.
High accuracy
Shelly Pro 3EM has a measurement accuracy of within 1%.
MODBUS support
Allows for easy and fast deployment in existing industrial installations.
Wi-Fi, LAN, and Bluetooth
Simultaneous Ethernet and Wi-Fi usage. MQTT, inbound and outbound WebSocket, UDP, mTLS support.
Power monitoring
Monitors mono-phase electrical systems with up to 3 points simultaneously. Fast notifications and 60 days record storage.
Scripting functionalities
Shelly Pro 3PM fully supports mjS scripting, allowing you to create further features, functionalities and interoperability.
Shelly 3EM PRO 120A
Monitor loads up to 120A per phase (clamps suitable for active cables up to 16mm in diameter).
Shelly 3EM PRO 400A
Monitor loads up to 400A per phase (clamps suitable for active cables up to 35mm in diameter).
Industry-grade security.
Shelly Pro 3EM supports mTLS for MQTT, HTTP, and secure outbound WebSockets. Its industry-grade security allows for direct connections to your cloud infrastructure, reducing the cost of deploying complex networks and VPNs.
Industrial installations.
Shelly Pro 3EM brings support for MODBUS for voltage, current, power, and energies. You can accurately sample your energy usage and instantaneous values of voltage, current, and power. Our new firmware platform allows for custom implementation that can report as fast as every 100ms to your infrastructure.
Local control.
Thanks to Shelly Pro 3EM’s scripting functionalities and webhooks, you can now easily control other Shelly or Wi-Fi devices on your local network. Use these capabilities to set exact parameters for HVAC, pool pumps, electric vehicle charging, etc – based on solar production. All without using “the cloud”.
Solar panel monitoring.
Keep track of how much energy your solar panels or wind turbines are generating. Shelly Pro 3EM provides real-time information about the efficiency of the solar and wind energy system, as well as historical data on how much energy has been generated and consumed every minute for the past 60 days.
Energy monitoring.
Monitor your home, office or factory – and avoid additional expenses or drops in voltage that can damage your appliances and devices. Shelly Pro 3EM can calculate 2-way consumption: produced and used energy for each of the three phases. The device can also be configured to measure three separate circuits of a mono-phase electrical system.
The finer details
Physical | |
| Size (HxWxD): | 94x19x69 ±0.5 mm |
| Weight: | 62 ±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) |
| Conductor stripped length: | 6 to 7 mm / 0.24 to 0.28 in |
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: | 110 - 240 V, 50/60 Hz |
| Power supply DC: | No |
| Device power consumption: | < 3 W |
| Monitoring clamps: | Includes 3 x CT120 (120A) clamps or 3 x CT400 (400A) clamps |
Sensors & Meters | |
| 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 - 120 A |
| Ammeters accuracy: | ±1 % (2 - 120 A), ±2 % (1 - 2 A), ±5 % (0 - 1 A) |
| 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 trough RPC |
Radio & Data | |
| Wi-Fi protocol: | 802.11 b/g/n |
| Wi-Fi Band: | 2401 - 2495 MHz |
| Wi-Fi signal power: | <20 dBm |
| Wireless range: | Up to 50 m outdoors and up to 30 m indoors (depending on the building materials) |
| Bluetooth Protocol: | 4.2 |
| Bluetooth Range: | Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors |
| Ethernet: | 1 x RJ45 Ethernet socket |
MCU | |
| CPU: | ESP32-D0WDQ6 |
| Flash memory: | 16 MB |
Firmware Capabilities | |
| Webhooks (URL actions): | 20 with 5 URLs per hook |
| Scripting: | mJS |
| MQTT: | Yes |
| CoAP: | No |
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