What are the full technical specifications of the Shelly Pro 3 EM?

Jan 1, 2026

The Shelly Pro 3 EM is a three-phase energy meter that precisely measures power consumption, PV feed-in, and energy flows. With 120 A per channel, Wi-Fi, Ethernet, MQTT, Modbus TCP, and cloud integration, it offers maximum control and transparency for households, commercial businesses, and industrial facilities. In combination with DRBO Greenenergy SunLit storage systems, it optimizes self-consumption, load management, and real-time energy monitoring.

How does the Shelly Pro 3 EM work?

The Shelly Pro 3 EM measures electrical power across three phases using external current clamps. Voltage, current, frequency, power factor, instantaneous power, as well as total consumption and feed-in are recorded. Data is transmitted in real time via LAN, Wi-Fi, or local interfaces to apps, the cloud, or energy management systems – ideal for DRBO Greenenergy installations.

What are the electrical specifications of the Shelly Pro 3 EM?

Parameter	Specification
Number of phases	3 phases
Max. current (per channel)	120 A (CT)
Rated voltage	230 V ±10% single-phase / 400 V three-phase
Measurement accuracy class	< 1%
Frequency range	50 / 60 Hz
Power measurement	active, reactive, apparent power
Energy metering	Consumption & feed-in separately
Operating temperature	–20 °C to +40 °C
Enclosure	DIN rail mounting, 4 TE

The Pro series is designed for permanent installation in distribution boards.

What communication options does the Shelly Pro 3 EM support?

It offers Wi-Fi 2.4 GHz, Ethernet, Bluetooth BLE, MQTT, Modbus TCP, and REST API/CoAP. This allows the meter to be flexibly integrated into smart home systems, industrial facilities, and energy management solutions such as DRBO Greenenergy SunLit.

What are the key measurement functions of the Shelly Pro 3 EM?

Active and reactive energy per phase
Instantaneous power (W, VAR, VA)
Voltage and current values per phase
Total energy feed-in for PV systems
Power factor and grid frequency

This data enables precise load control, PV monitoring, and storage optimization.

What safety and reliability features does the device offer?

Housing made of flame-retardant plastic
Protection against overvoltage, overheating, and short circuits
Internal voltage isolation
EN IEC 61010-1 compliance

DRBO Greenenergy particularly recommends the Pro 3 EM for commercial businesses, PV systems, and storage integration.

What are the installation requirements for the Shelly Pro 3 EM?

Mounting on a DIN rail (4 TE) with external current transformers (120 A). Configuration via Shelly Cloud, local IP, or Bluetooth app. For professional monitoring, a stable LAN connection is recommended, especially in combination with DRBO Greenenergy SunLit storage systems.

What data and storage functions are available?

Internal memory: up to 1 year of historical values
Cloud & App: Live and historical views
Export: JSON / CSV / Modbus TCP
Data security: HTTPS encryption, local storage possible

This makes integration into energy management systems like DRBO Greenenergy EMS straightforward.

DRBO Greenenergy Expert Opinions

"The Shelly Pro 3 EM offers three-phase measurement for precise energy monitoring. In conjunction with SunLit storage systems, it provides real-time data for efficient load management, PV monitoring, and self-consumption optimization. This gives customers full transparency and control over their energy profile."
— DRBO Greenenergy Engineering Team

What protocols and integrations are available?

Protocol	Application
MQTT	Cloud-free IoT communication
Modbus TCP/IP	Industrial integration
REST API / CoAP	Direct developer access
Shelly Cloud & App	Remote control & history

These standards facilitate integration into building management and PV monitoring.

What are the possible applications for the Shelly Pro 3 EM?

Private households: consumption analysis, cost control
Commercial businesses: load management, energy efficiency
PV systems: real-time feed-in
Storage solutions: charge cycle control (SunLit)
Smart Buildings: Modbus or MQTT integration

At DRBO Greenenergy, it is often used as part of a complete energy management package.

How precisely does the Shelly Pro 3 EM measure energy flows?

Accuracy < 1%, even with asymmetrical three-phase systems. 120 A CTs enable precise measurement of high loads, ideal for PV, heat pumps, or commercial installations.

Why is the Shelly Pro 3 EM ideal for PV and energy storage applications?

Its three-phase capability and diverse protocols allow for optimal combination with PV inverters and storage solutions such as DRBO Greenenergy SunLit storage systems. Consumption and back-feed are recorded, enabling efficient control of self-consumption and load management.

Conclusion: Precision and Flexibility for Energy Professionals

The Shelly Pro 3 EM is a universal, precise energy meter for households, commercial businesses, and industrial facilities. In combination with DRBO Greenenergy SunLit storage solutions, it creates a fully integrated energy management system with real-time data, optimal load management, and high reliability.

Frequently Asked Questions (FAQs)

1. Does the Shelly Pro 3 EM measure bidirectionally?
Yes, consumption and feed-in are recorded separately for each phase.

2. Can I use the meter without the cloud?
Yes, it can be operated completely offline via MQTT, Modbus, or local API.

3. Which current transformers are compatible?
Standard CT sensors up to 120 A, 0.333 V output.

4. Is the Pro 3 EM suitable for photovoltaics?
Yes, perfect for PV feed-in, self-consumption, and storage control.

5. Does the meter support firmware updates?
Yes, OTA updates ensure long-term software stability.

Some of the information in this article is sourced from the internet. Product specifications may be updated at any time. For the latest information, please visit the official website or product page.