Shelly
Shelly Pro 3EM. 3-Phase Energy Meter with Wi-Fi, LAN & Bluetooth. Real-Time Power Monitoring
Shelly Pro 3EM. 3-Phase Energy Meter with Wi-Fi, LAN & Bluetooth. Real-Time Power Monitoring
SKU:Pro 3EM
Condition: New
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The Shelly Pro 3EM is a professional-grade 3-phase energy meter designed for precise monitoring of electrical consumption in residential, commercial, and industrial environments.
Installed on a DIN rail inside the electrical panel, the device measures real-time voltage, current, active power, and energy consumption with 1% accuracy.
With Wi-Fi, LAN, and Bluetooth connectivity, Shelly Pro 3EM integrates seamlessly with modern smart home and automation platforms, enabling advanced energy management, solar monitoring, and load analysis.
It supports local control, cloud access, MQTT, REST API, and scripting, making it ideal for both professional integrators and advanced automation systems.
The device can monitor three independent phases or three separate circuits, providing detailed insights into how electricity is used across a building.
Why Choose Shelly Pro 3EM
Understanding how energy is consumed is the first step toward improving efficiency and reducing electricity costs.
Shelly Pro 3EM provides real-time insights into power usage, helping homeowners, businesses, and system integrators identify energy waste, monitor solar production, and optimize electrical systems.
Its DIN-rail design, professional connectivity options, and high measurement accuracy make it a reliable solution for advanced energy monitoring and automation.
Key Features
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3-Phase Energy Monitoring
Monitor three electrical phases simultaneously or track three independent circuits. -
High Measurement Accuracy
Measures voltage, current, active power, and energy consumption with 1% accuracy. -
Wi-Fi, LAN & Bluetooth Connectivity
Multiple connectivity options provide reliable integration with smart home and automation systems. -
DIN Rail Installation
Designed for professional installation inside electrical panels. -
Local Control & Cloud Access
Operate locally without internet access or manage remotely through Shelly Cloud. -
Advanced Automation Support
Compatible with MQTT, HTTP, Webhooks, and REST API for integration with automation platforms. -
Solar & Renewable Energy Monitoring
Track solar production, grid consumption, and energy export. -
Historical Energy Data
Access detailed energy consumption history for analysis and optimization.
⚠NOTICE! The Device does not have a built-in relay. Contactor control is provided using a Shelly Pro Addon attached to the Shelly Pro 3EM.
Notes:
(*1) The Device has phase sequence error detection circuits. This detection works on phase voltages and considers only the zero crossings. The regular succession of these zero-crossing events is Phase A followed by Phase B followed by Phase C. If the sequence of zero-crossing events is, instead, Phase A followed by Phase C followed by Phase B, then a phase_sequence error is reported when the Phase sequence error detection option is enabled.
How to Install
How to Install
Functionalities
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4-quadrant measurement
Measure capacitive and inductive load types of active imported and exported energies.
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MODBUS support
Allows for easy and fast deployment in existing industrial installations.
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Power monitoring
Monitors mono-phase electrical systems with up to 3 points simultaneously. Fast notifications and at least 60 days of 1-minute records storage.
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Accuracy class B (active energy)
Shelly Pro 3EM has a measurement accuracy of 1%.
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Wi-Fi, LAN, and Bluetooth connectivity
Simultaneous Ethernet and Wi-Fi usage. MQTT, inbound and outbound WebSocket, UDP, mTLS support.
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Scripting functionalities
Shelly Pro 3PM fully supports mjS scripting, allowing you to create further features and functionalities.
No hub required, Universally compatibleShelly Products can be controlled locally, directly and without a hub through your smartphone/table with Shelly App - no hub or other equipment needed. Enable cloud feature and get remote control from anywhere. At the same time, you can integrate Shelly directly with virtually every smart home hub, voice assistant, open source platform, or premium control system. |
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No hub required, Universally compatibleShelly Products can be controlled locally, directly and without a hub through your smartphone/table with Shelly App - no hub or other equipment needed. Enable cloud feature and get remote control from anywhere. At the same time, you can integrate Shelly directly with virtually every smart home hub, voice assistant, open source platform, or premium control system. |
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| Physical | |
|---|---|
| Current Transformer: | 3 x CT120 included in the package |
| Size (HxWxD): | 94x19x69 ±0.5 mm / 3.70x0.75x2.71 ±0.02 in |
| Weight: | 62 ±1 g / 2.19 ±0.05 oz |
| 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 |
| Shell material: | Plastic |
| Color: | White |
| 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 voltage DC: | N/A |
| Power consumption: | < 3 W |
| 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 | |
| RF band: | 2401 - 2495 MHz |
| Max. RF power: | <20 dBm |
| Wi-Fi protocol: | 802.11 b/g/n |
| Wi-Fi Range: | Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors (Depends on local conditions) |
| Bluetooth Protocol: | 4.2 |
| Bluetooth Range: | Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors (Depends on local conditions)" |
| MCU | |
| CPU: | ESP32-D0WDQ6 |
| Flash: | 16 MB |
| Firmware capabilities | |
| Webhooks (URL actions): | 20 with 5 URLs per hook |
| Scripting: | mJS |
| MQTT: | Yes |
| CoAP: | No |
| Shelly Pro EM-50 | Shelly Pro 3EM |
|---|---|---|
AC voltage per Channel | 100-260 volts 50/60Hz | 100-260 volts 50/60Hz |
Phases Supported | Single (same phase only) | Single, Split Single, Two, Three |
Number of CTs | 2 | 3 |
Max Amps/Channel | 50 | 120 or 400 |
Contactor Control | Yes | Requires Pro 3EM Switch Add-on |
Contactor AC | 100-260 volts 50/60Hz | 100-260 volts 50/60Hz |
Contactor DC | N/A | Up to 30 Volts |
Contactor Amperage | 2 amps | 2 amps |