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  • Total price: €429.70
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Shelly Pro 3EM-400A


New generation three-phase energy meter

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Shelly Pro 3EM-400A New generation three-phase energy meter

Shelly Pro 3EM-400 is a DIN rail mountable three-phase energy meter . Boosted with everything

the flexibility of gen2 firmware and LAN connectivity, provides professional integrators with options

additional for end customer solutions. Shelly Pro 3EM-400 reports the accumulated energy

as well as the instantaneous voltage , current and power factor per phase in real time .

Why shelly pro 3em?

Shelly Pro 3EM-400 is a DIN mountable three-phase energy meter with Wi-Fi and Wi-Fi, Bluetooth and LAN connectivity.

With an active energy measurement accuracy of 1%, Shelly Pro 3EM-400 can be used to monitor

the consumption of household appliances, company electrical circuits and office equipment individually.

It has 60 days of historical data on the device with 1 minute resolution for each stage. Also, his

scripting capabilities enable the execution of complex scenes and provide broader monitoring capabilities.

Industrial grade security

Shelly Pro 3EM-400 supports mTLS for MQTT , HTTP and secure outgoing WebSockets . Its industrial-grade security

allows direct connections to your cloud infrastructure, reducing the cost of implementing complex networks and VPNs.

Infinite use applications

Industrial plants : Shelly Pro 3EM-400 offers MODBUS support for voltage, current, power and energies.

You can accurately sample your energy consumption and instantaneous voltage, current and power values.

Our new firmware platform allows for a custom implementation that can send

report to your infrastructure at the rate of every 100 ms.

2-Way Energy Consumption Monitor : Monitor your home, office or factory and avoid expenses

surges or voltage drops that could damage your appliances and devices.

Shelly Pro 3EM-400 can calculate bidirectional consumption: energy produced and used for each of the three phases .

The device can be configured to measure three separate circuits of a single-phase electrical system. View the

quality of your electricity network in terms of active power, reactive power, voltage and power factor.

Local Control : Thanks to Shelly Pro 3EM-400's scripting capabilities and webhooks, you can now easily control

other Shelly or Wi-Fi devices on your local network. Use these features to set exact parameters for

the heating, cooling or charging of electric vehicles based on the photovoltaic production and do so

your devices to automatically reduce energy consumption. All of these work without using a cloud.

Monitoring and control of solar panels

Track the amount of energy your solar panels or wind turbines generate and save effortlessly.

Shelly Pro 3EM-400 provides real-time information on solar and wind energy system efficiency, as well as

historical data on how much energy was generated and consumed every minute for the last 60 days.

This helps you control the flow of energy , getting the most out of your solar panels and wind turbines.

To take it a step further, connect Shelly Pro 3EM-400 to your other Shelly devices and create scenes to trigger the

desired actions such as turning off appliances or sounding alarms.

Full compatibility

Shelly devices are compatible with Alexa, Google Home, Android and iOS .

Together with the voice assistant , you can control Shelly devices using only your voice!

Shelly smart control

Shelly Smart Control is here! A single app to control your spaces, energy consumption and expenses.

Features and Functionality:
  • It can measure up to 400 A for each phase and the neutral .
  • 4 quadrant measurement with multiple connection types.
  • Accuracy class B active energy (compliance with standard IEC 62053-21 based on manufacturer tests).
  • Predisposition for photovoltaic.
  • Phase sequence error detection (option).
  • Optical pulse indication of power consumption .
  • Measurement accuracy up to 1% .
  • Stores data in non-volatile memory that can be retrieved for up to 60 days at 1-minute intervals.
  • The package includes 3 x 400A current transformers.

Product Details

Data sheet

110-240V, 50/60Hzp
Working temperature
-20°C to +40°C
Working humidity
30% to 70% relative humidity
Voice Control
Amazon Alexa, Google Home and Siri
Mobile application
Shelly Cloud
Item weight
62 g
Communication Protocol
Communication Protocol
Communication Protocol
- 3W
Voltmeters (RMS for each phase)
100 - 260V
Accuracy of voltmeters
±1 %
Ammeters (RMS via CT for each phase and Neutral)
0 - 400A
Accuracy of ammeters
±1% (5 - 400A), ±2% (0-5A)
Power and energy meters
Active and apparent power, Active and apparent energy, Power factor, Fundamental active and fundamental reactive energy
No loading threshold
30 VA per phase
Storage of measurement data
At least 60 days of 1 min data resolution
Data export
in JSON format of CSV logged values for PQ via RPC
Bluetooth protocol
Webhooks (URL actions)
20 with 5 URLs per hook
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