What features does the Shelly Pro 3 EM have?

The Shelly Pro 3 EM is a high-precision 3-phase energy meter with 1% accuracy, measuring power consumption, feed-in, and phase values. It offers LAN and cloud connectivity, MQTT support, integrated relay control, and DIN rail mounting. Ideal for homes, offices, or industry to optimize solar and storage systems like DRBO Greenenergy's SunLit, maximizing efficiency and cost savings.

What is the Shelly Pro 3 EM and what is it used for?

The Shelly Pro 3 EM is a compact 3-phase meter for DIN rails that precisely records consumption, power, and energy flows. It is suitable for private households, offices, and industrial facilities to monitor energy consumption, reduce costs, and optimize self-consumption from PV systems or storage units. DRBO Greenenergy recommends it for complementing balcony PV systems and SunLit storage units for precise data analysis.

What measurement accuracy and ranges does the Shelly Pro 3 EM offer?

The device provides a measurement accuracy of 1% for active energy, voltage, and current. Measurement ranges include up to 120 A per phase with integrated current transformers or external CTs, voltages up to 260 V per phase, and power up to 26 kW.

Detailed readings:

• Active and reactive energy (kWh)

• Voltage (V), current (A), power (W)

• Power factor per phase

This precision is particularly suitable for billing and optimizing systems such as bidirectional inverters.

How does the 3-phase monitoring work with the Shelly Pro 3 EM?

All three phases are monitored independently with separate inputs for current transformers and voltage. L1, L2, L3, as well as total values, are recorded, and phase imbalances are automatically detected.

Advantages:

• Single-phase analysis

• Total consumption and generation

• Bidirectional measurement of consumption and feed-in

Ideal for homes or businesses, supplemented by DRBO Greenenergy's energy management.

What connectivity options does the Shelly Pro 3 EM have?

The Shelly Pro 3 EM supports Wi-Fi (2.4 GHz), Bluetooth, and LAN for stable connections. Cloud integration via the Shelly App, local MQTT/HTTP, and Modbus TCP interfaces allow for flexible control.

Connectivity Comparison Shelly Pro 3 EM

Does the Shelly Pro 3 EM have integrated relay functions?

Yes, each phase has a 16 A relay with up to 3.6 kW switching capacity. Remote control of loads, emergency shutdown, or load management is possible.

Functions:

• Single-phase control

• Schedules and scenarios via app

• Automatic shutdown in case of overload

Optimal for dynamic energy management, e.g., in combination with SunLit storage units from DRBO Greenenergy.

What storage and recording functions does the device offer?

The Shelly Pro 3 EM stores data for up to 365 days locally at 1-minute intervals, with unlimited cloud storage and CSV export options.

Advantages:

• Offline operation possible

• High resolution for analyses

• Automatic reports and diagrams

Ideal for long-term consumption analysis in PV systems.

How does the Shelly Pro 3 EM integrate into smart home systems?

Integration into Home Assistant, openHAB, Jeedom and others via MQTT/HTTP. Support for Alexa, Google Home, and IFTTT via the cloud.

Tips:

• MQTT publishing of all measured values

• Scenarios like "PV surplus → start charging"

• Compatible with Shelly ecosystem

DRBO Greenenergy uses similar sensors for optimizing balcony electricity storage units.

What installation options does the Shelly Pro 3 EM have?

DIN rail 35 mm in the distribution board, plug-and-play terminals for current transformers and voltage.

Installation:

• Quick installation without drilling

• Up to 120 A without external CTs

• IP54 enclosure for harsh environments

Suitable for electricians; compatible with 3-phase households.

Can the Shelly Pro 3 EM be combined with solar and storage systems?

Yes, it precisely measures PV yield, self-consumption, and storage charging/discharging. Bidirectional measurement records feed-in to the grid or storage.

Applications:

• Optimization of balcony power plants

• Load management with SunLit storage units from DRBO Greenenergy

• Automated switching in case of surplus

Significantly increases the efficiency of decentralized systems.

What safety and protection functions are integrated?

Overcurrent, overvoltage, and temperature protection, relay overload shutdown, firmware updates, and TLS secured communication.

Features:

• Automatic shutdown in case of errors

• Phase monitoring against imbalances

• Local operation without cloud dependence

Reliable for critical applications.

How do firmware and app functionality impact performance?

The Shelly app provides dashboards, diagrams, schedules, and scenarios. Firmware updates continuously expand functions.

Advantages:

• Mobile remote control

• Multi-device management

• Export and reports

Ensures future-proofing.

DRBO Greenenergy Expert Opinions

"The Shelly Pro 3 EM is a key device for decentralized energy management systems. Its 1%-accurate 3-phase measurement provides the basis for optimal control of balcony PV, bidirectional inverters, and SunLit storage units. At DRBO Greenenergy, we recommend it to anyone who wants to maximize self-consumption and reduce costs – scalable, cloud-independent, and reliable."

Conclusion: Is the Shelly Pro 3 EM the right choice for your energy management?

The Shelly Pro 3 EM impresses with high precision, full 3-phase monitoring, flexible connectivity, and relay control. Ideal for homes, commercial establishments, or industries with PV systems. Combination with DRBO Greenenergy solutions maximizes efficiency. Installation, integration via MQTT, and consumption optimization bring quick, noticeable savings.

Frequently Asked Questions (FAQs)

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

2. Does it need external current transformers?
Integrated up to 120 A per phase; external CTs required above that.

3. Does it work without internet?
Yes, local operation via LAN/MQTT, data can be stored for up to 1 year.

4. Is installation easy?
For electricians: DIN rail, terminal connections, quick assembly.

5. Is it compatible with DRBO Greenenergy systems?
Perfect for balcony PV and SunLit storage units for consumption optimization.

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