Price: $128.99 - $102.64
(as of Mar 30, 2026 14:51:57 UTC – Details)
Product description
Shelly Pro 3EM features industry-grade mTLS for MQTT, HTTP, and secure outbound WebSockets, enabling direct cloud connections and reducing network deployment costs.
Shelly Pro 3EM adds MODBUS support for voltage, current, power, and energy. Monitor energy usage and real-time values with customized firmware reporting every 100ms.
Shelly Pro 3EM measures 2-way consumption across three phases or circuits, showing power quality metrics like active power, reactive power, voltage, and power factor.
Control Shelly or Wi-Fi devices locally. Set heating, cooling, or EV charging based on PV production, with automatic power shedding, all without cloud services.
Track solar/wind energy with Shelly Pro 3EM. Get real-time efficiency data and 60-day history to optimize usage. Connect with other Shelly devices for smart automation.
Size (HxWxD): 94x19x69 ±0.5 mm / 3.70×0.75×2.71 ±0.02 in Mounting DIN rail Ambient temperature -20 °C to 40 °C / -5 °F to 105 °F Power supply voltage AC 100 – 260 V, 50/60 Hz Power consumption < 3 W Internal-temperature sensor Yes Voltmeters (RMS for phase) 100 – 260 V Voltmeters accuracy ±1 % Power and energy meters Active and apparent power, Active and apparent energy, Power factor, Fundamental active and fundamental reactive energy Wireless/WiFi Protocol 802.11 b/g/n Wi-Fi Range Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors Bluetooth Range Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors Webhooks (URL actions): 20 with 5 URLs per hook Scripting and MQTT Yes
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Customer Reviews
4.6 out of 5 stars 3,227
4.6 out of 5 stars 3,227
4.6 out of 5 stars 3,227
4.6 out of 5 stars 3,227
Price
$102.64$102.64
$18.19$18.19
$197.99$197.99
$79.99$79.99
Functions
Real-time energy monitoring
Switching and triggering
Real-time energy monitoring
Real-time energy monitoring
Additional functions
Measures up to 120 A per phase
Boost Shelly Pro 3EM features
Measures up to 400 A per phase
Measures up to 63 A per phase
Power Supply
AC
DC
AC
AC
Inputs
3 inputs
1 Inputs
3 Inputs
3 Inputs
Outputs
3 Channels
1 Channel
3 Channels
3 Channels
Wi-Fi and Bluetooth
✔
✔
✔
✔
My Shelly Pro 3EM fails to connect. What should I do?
Make sure to you are entering correctly the SSID name and password. Upper/lowercases must be respected. Make sure to allow all permissions for the app, including precise location. For further support, use support.shelly.cloud
How do I install Shelly Pro 3EM?
All Shelly Pro devices are DIN-mountable inside the breaker box. Check the wiring diagram in our User & Safety guide or see our installation video for further support.
My Shelly Pro 3EM shows incorrect/inaccurate readings. What should I do?
Wrong measurements are usually due to incorrect wiring. Check that CT transformers are properly positioned, each phase is connected to the correct port, and each CT matches the right phase and device port.
Does Shelly Pro 3EM require a neutral wire?
Yes, a neutral wire is mandatory.
Can I use 50A clamp for Shelly Pro 3EM?
No, you can only use Shelly Pro 3EM with 120 A CTs and each transformer is calibrated for the specific device port. We do not recommend using different brands as it can result in wrong measurements.
Shelly Pro 3EM is a Wi-Fi-operated, DIN-mountable 3-phase energy meter with Wi-Fi and LAN connectivity. With an active energy measurement accuracy of 1%, it allows precise monitoring of energy consumption for home appliances, electric circuits, and office equipment individually. The package includes three 120A Current Transformers for enhanced measurement. Additionally, it functions as a Bluetooth gateway, expanding connectivity for smart home automation.
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 | Industry grade security- the device can have direct connections to your cloud infrastructure, reducing the cost of deploying complex networks and VPNs.;
Solar Panels Monitoring and Control – Keep track of how much energy your solar panels or wind turbines are generating and save effortlessly. Access real-time information about the efficiency of your system and historical data for up to 60 days.
Shelly Customer Service – Shelly is one of the fastest-growing IoT brands in the world with devices, providing solutions for the automation of private homes, buildings and businesses. We provide our customers with professional support and a 5 years device warranty.
Shelly Smart Control App will help you control your Shelly devices remotely and will send notifications for all automated events in your home. You can easily configure devices and manage their settings individually, or you can create personalized scenes by combining Shelly devices to trigger certain actions in your home automation.
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