Shelly Pro 3EM 120A energy meter

Shelly Pro 3EM 120A indirect 1 to 3-phase kWh meter WiFi/Ethernet/BT/Modbus TCP, next-generation energy meter.

The Shelly Pro 3EM is a WiFi-powered, DIN-mountable 3-phase energy meter with WiFi, Bluetooth, and LAN connectivity. With an active energy measurement accuracy of 1%, the Shelly Pro 3EM can be used to individually monitor the consumption of all household appliances, circuits, and office equipment. Historical data is stored for up to 60 days, with each phase having a one-minute resolution. Additionally, scripting features enable the execution of complex scenarios and provide advanced monitoring capabilities.

• Can measure up to 120 A for each phase and the neutral conductor
  
• 4-quadrant measurement with multiple connection types
  
• Active energy accuracy class B (according to IEC 62053-21 based on manufacturer tests)
  
• Suitable for photovoltaic installations
  
• Phase sequence detection (optional)
  
• Optical pulse display of energy consumption
  
• Measurement accuracy up to 1%
  
• Memory retrievable for up to 60 days with 1-minute intervals
  
• Includes 3 current transformers of 120 A
• Next-generation 3-phase energy meter

The Shelly Pro 3EM is a Wi-Fi powered, DIN-mountable 3-phase energy meter with Wi-Fi, Bluetooth, and LAN connectivity. With a measurement accuracy of 1% active energy, the Shelly Pro 3EM can be used to individually monitor the consumption of all household appliances, circuits, and office equipment. Historical data is stored for up to 60 days, with each phase having a one-minute resolution. Additionally, scripting functionality enables the execution of complex scenarios and offers advanced monitoring capabilities.

Features:

• 4-quadrant measurement - For measuring capacitive and inductive loads of imported and exported active energy.
  
• Accuracy class B (active energy). The Shelly Pro 3EM has a measurement accuracy of 1%.
• MODBUS support - Enables simple and fast integration into existing industrial installations.
  
• Wi-Fi, LAN, and Bluetooth connectivity - Simultaneous Ethernet and Wi-Fi usage. MQTT, incoming and outgoing WebSocket, UDP, and mTLS support.
  
• Electric grid monitoring 
• Monitors single-phase electrical systems with up to three points simultaneously.
• Fast notifications and at least 60 days of one-minute recording storage.
  
• Scripting features - Shelly Pro 3PM fully supports mjS scripting, allowing you to create additional features and functionality. 
  

The Shelly Pro 3EM-400 supports mTLS for MQTT, HTTP, and secure outgoing websockets. Commercial-grade security enables direct connections to your cloud infrastructure and reduces the costs of deploying complex networks and VPNs.

Use cases:

• Industrial facilities - Shelly Pro 3EM offers MODBUS support for voltage, current, power, and energy. Your energy consumption and real-time values of voltage, current, and power are accurately recorded. Our new firmware platform enables a custom implementation that can report to your infrastructure every 100 ms.
  
• Two-way energy monitoring - Monitor your home, office, or factory to avoid unnecessary costs or voltage drops that can damage your household and office equipment. Shelly Pro 3EM can calculate two-way consumption: the produced and consumed energy for each of the three phases. The device can also be configured to measure three separate circuits of a single-phase electricity system. It displays the quality of your electrical grid in terms of active power, reactive power, voltage, and power factor.
  
• Local control - Thanks to the scripting capabilities and webhooks of the Shelly Pro 3EM, you can easily control other Shelly or Wi-Fi devices in your local network. Use these features to set precise parameters for heating, cooling, or charging electric vehicles based on your PV generation, and automatically disconnect your devices from power consumption. All this works without needing a cloud.
  
• Monitoring and control of solar panels - See how much energy your solar panels or wind turbines generate and save effortlessly. Shelly Pro 3EM provides real-time information on the efficiency of your solar and wind energy system, as well as historical data on energy generation and consumption over the past 60 days - in one-minute increments. This allows you to regulate the energy flow and use your solar panels and wind turbines as efficiently as possible. In a next step, you can link Shelly Pro 3EM to your other Shelly devices and create scenarios to perform desired actions, such as turning off household appliances or activating an alarm.

Support:

• Full compatibility – Shelly devices are compatible with Alexa, Google Home, Android, and iOS. Together with their voice assistants, they can support their Shelly devices!
  
• Shelly Smart Control – An app for room control, energy management, and energy saving. Customize your dashboards, receive detailed consumption reports, and keep track of your energy bill.
  Technical specifications:

Technical specifications:

• AC power supply: 110-240 V, 50/60 Hz
  
• DC power supply: n.a.
  
• Neutral wire required: Yes
  
• Measurement inputs: 4 transformer inputs
  
• Overheat protection: Yes
  
• Ambient temperature: -20 °C to 40 °C
  
• Humidity: 30% to 70% RH
  
• Voltmeters (RMS for each phase): 100-260 V
  
• Voltmeter accuracy: ±1%
  
• Current meters (RMS over CT for each phase and neutral): 0-120 A
  
• Current meter accuracy: ±1% (2-120 A), ±2% (1-2 A), ±5% (0-1 A)
  
• Power and energy meters: Active and apparent power; power factor;
• Fundamental active and fundamental reactive energy
  
• Measurement data storage: At least 60 days with a data resolution of 1 minute
  
• Data export: CSV for recorded PQ values, export in JSON format via RPC
  
• Device power consumption: < 3 W
  
• RF band: 2.4 MHz
  
• Max. RF power: <20 dBm
  
• WiFi protocol: 802.11 b/g/n
  
• WiFi range: Up to 30 m indoors and 50 m outdoors (depending on local
• onditions)
  
• Bluetooth protocol: I4.2
  
• Bluetooth range: Up to 10 m indoors and 30 m outdoors (depending on local conditions)
  
• CPU: ESP32-D0WDQ6
  
• Flash: 16 MB
  
• Webhooks (URL actions): 20 with 5 URLs per hook
  
• Scripting: mJS
  
• MQTT: Yes
  
• CoAP: No
  
• Current transformer: 3 x CT120 included
  
• Dimensions (HxWxD): 94 x 19 x 69 ±0.5 mm
  
• Weight: 62 ±1 g
  
• Mounting: DIN-rail
  

Info