Shelly Pro 3EM - 120A
Next-generation 3-phase power consumption meter
The Shelly Pro 3EM is a Wi-Fi powered, DIN-mountable 3-phase power consumption meter with Wi-Fi, Bluetooth, and LAN connectivity. With its 1% accurate active energy measurement, the Shelly Pro 3EM can be used to monitor the consumption of all household appliances, circuits, and office devices individually. Historical data is stored for up to 60 days, with each phase having a one-minute resolution. Additionally, the scripting functionalities allow the execution of complex scenarios and offer advanced monitoring options.
WHY SHELLY PRO 3EM?
Next-generation 3-phase power consumption meter
The Shelly Pro 3EM is a Wi-Fi powered, DIN-mountable 3-phase power consumption meter with Wi-Fi, Bluetooth, and LAN connectivity. With its 1% accurate active energy measurement, the Shelly Pro 3EM can be used to monitor the consumption of all household appliances, circuits, and office devices individually. Historical data is stored for up to 60 days, with each phase having a one-minute resolution. Additionally, the scripting functionalities allow the execution of complex scenarios and offer advanced monitoring options.
Features
4-quadrant measurement
For measuring capacitive and inductive load types of imported and exported active energy.
Accuracy class B (active energy)
The Shelly Pro 3EM has a measurement accuracy of 1%.
MODBUS support
Allows easy and quick deployment in existing industrial facilities.
Wi-Fi, LAN, and Bluetooth connectivity
Simultaneous Ethernet and Wi-Fi usage. MQTT, incoming and outgoing WebSocket, UDP, mTLS support.
Power grid monitoring
Simultaneous monitoring of single-phase electrical systems with up to 3 sockets. Fast notifications and at least 60 days of data storage in one-minute intervals.
Scripting functionalities
Shelly Pro 3PM fully supports mjS scripting, allowing you to create additional functions and functionalities.
Commercial-grade security
Shelly Pro 3EM 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.
Endless applications
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 custom implementation that can report to your infrastructure every 100 ms.
Two-way energy consumption monitoring
Monitoring your home, office, or factory to avoid unnecessary expenses or voltage drops that can damage your household and office devices. Shelly Pro 3EM can calculate two-way consumption: produced as well as consumed energy for each of the three phases. The device can also be configured to measure three separate circuits of a single-phase electrical system. Displays the quality of your power grid in terms of active power, reactive power, voltage, and power factor.
Local control
Thanks to the scripting capabilities of Shelly Pro 3EM and webhooks, 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 electric vehicle charging based on your PV generation and automatically disconnect your devices from power consumption. All this works without needing to use a cloud.
Monitoring and control of solar panels
Monitor how much energy your solar panels or wind turbines generate – 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 last 60 days – in one-minute intervals. This allows you to control the energy flow and use your solar panels and wind turbines most efficiently. In a further step, you can link Shelly Pro 3EM with your other Shelly devices and create scenarios to trigger desired actions such as turning off household appliances or activating an alarm.
Technical data
| CONNECTION | ||
|---|---|---|
| AC power supply | 110 - 240 V, 50/60 Hz | |
| DC power supply | N/A | |
| Neutral conductor required | Yes | |
| FUNCTIONS | ||
| Measurement inputs | 4 transformer inputs | |
| Overtemperature protection | Yes | |
| Ambient temperature | -20 °C to 40 °C | |
| Humidity | 30 % to 70 % RH | |
| Voltage meters (RMS for each phase) | 100 - 260 V | |
| Voltage meter accuracy | ±1 % | |
| Current meters (RMS via CT for each phase and neutral conductor) | 0 - 120 A | |
| Current meter accuracy | ±1 % (2 - 120 A), ±2 % (1 - 2 A), ±5 % (0 - 1 A) | |
| Power and energy meter | Active and apparent power; power factor; fundamental active and fundamental reactive energy | |
| Measurement data storage | At least 60 days with 1-minute data resolution | |
| Data export | CSV for recorded PQ values, JSON format export via RPC | |
| Device power consumption | < 3 W | |
| FREQUENCY | ||
| RF band | 2.4 MHz | |
| Max. RF power | <20 dBm | |
| CONNECTIVITY | ||
| Wi-Fi protocol | 802.11 b/g/n | |
| Wi-Fi range | Up to 30 m indoors and 50 m outdoors (depending on local conditions) | |
| Bluetooth protocol | 4.2 | |
| Bluetooth range | Up to 10 m indoors and 30 m outdoors (depending 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 | |
| FEATURES | ||
| Current transformers | 3 x CT120 included | |
| Size (HxWxD) | 94x19x69 ±0.5 mm | |
| Weight | 62 ±1 g | |
| Mounting | DIN rail | |
| Screw terminal max. torque | 0.4 Nm | |
| Conductor cross-section | 0.5 to 2.5 mm² / 20 to 14 AWG (Solid, stranded, and ferrules) | |
| Length of stripped conductor | 6 to 7 mm | |
| Device material | Plastic | |
| Color | White | |
| Max. height | 2000 m | |
