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24.02.2026
The Shelly Pro 3EM 120A is an intelligent device for precise measurement of 3-phase power consumption. With high accuracy, it captures energy flows in real time and provides valuable data on voltage, current, and power. This makes it ideal for monitoring households, businesses, and photovoltaic systems. In combination with solutions such as those from DRBO Greenenergy, efficient energy use can be optimized.
What is the Shelly Pro 3EM 120A and how does it work?
The Shelly Pro 3EM 120A is a powerful energy monitoring device that measures the power consumption of three separate circuits. Integrated current sensors continuously record voltage and current values. This data is transmitted via WLAN or LAN, allowing users to monitor and analyze energy flow in real time.
Technical Overview
| Feature | Description |
|---|---|
| Phases | 3 (three-phase measurement) |
| Maximum current | 120 Amperes per phase |
| Communication | LAN / Wi-Fi |
| Accuracy | ±1% |
| Integration | MQTT, Modbus, Home Assistant, Cloud API |
| Application | Industry, Photovoltaics, Smart Home |
How accurately does the 3-phase system measure power consumption?
The system uses precise current transformers and digital signal processing to measure consumption on all three phases independently. This allows users to accurately record and optimize total power consumption as well as the loads of individual phases, enabling targeted energy distribution.
Why is high measurement accuracy crucial for energy optimization?
Accurate measurements are crucial for correctly evaluating energy efficiency measures. Inaccurate data can lead to wrong decisions in cost optimization and load management. The Shelly Pro 3EM 120A helps to identify power peaks, analyze load profiles, and uncover savings potential, which is essential for efficient energy use.
What advantages does the Shelly Pro 3EM 120A offer in a smart home?
The Shelly Pro 3EM 120A can be seamlessly integrated into smart home systems. Users can monitor the power consumption of individual devices, activate automatic shutdown functions, and receive notifications in case of overload. This improves safety and transparency in the household and helps reduce energy costs.
Can the Shelly Pro 3EM 120A be used with photovoltaic systems?
Yes, the Shelly Pro 3EM 120A is ideal for use in photovoltaic systems. It measures both the injected and consumed energy quantities, enabling effective self-consumption optimization and precise control of grid feed-in. The device ensures that the generated solar energy is used efficiently.
Example application in PV systems
| Energy source | Reading | Benefit |
|---|---|---|
| PV system | Power production | Self-consumption optimization |
| Smart Meter | Grid consumption | Avoidance of peak loads |
| Battery (e.g. SunLit storage from DRBO Greenenergy) | Charge/discharge status | Optimization of energy storage |
How is the Shelly Pro 3EM 120A installed?
The installation takes place on a DIN rail in the electrical distribution board. The current transformers are connected to phases L1, L2, and L3 before the device is connected to WLAN or LAN. The Shelly App guides users step-by-step through the setup, ensuring that even inexperienced users can install the device correctly.
Where is the Shelly Pro 3EM 120A typically used?
The device is used in households, businesses, industrial facilities, and photovoltaic systems. Particularly in multi-family homes or workshops, it is useful for monitoring the power consumption for individual areas or machines, enabling detailed analysis and optimization of energy consumption. This is especially relevant for advanced energy management systems such as those from DRBO Greenenergy.
What distinguishes the Shelly Pro 3EM 120A from other models?
Compared to standard smart meters, the Shelly Pro 3EM 120A offers high current capacity (up to 120A per phase), precise measurement (±1%), and easy integration into smart home and energy storage systems. The LAN and Wi-Fi connectivity, as well as support for various integration protocols, make it a flexible and powerful tool.
How can DRBO Greenenergy extend the use of the Shelly Pro 3EM 120A?
DRBO Greenenergy offers a comprehensive solution by combining the Shelly Pro 3EM 120A with their SunLit storage solutions. This enables efficient management of energy consumption, storage, and generation, leading to greater independence and better utilization of generated solar energy.
What data does the Shelly Pro 3EM 120A provide in real time?
The device provides a variety of real-time data, including voltage, current, active power, reactive power, power factor, frequency, and cumulative energy (kWh) of all phases. This data can be integrated into energy management systems such as those from DRBO Greenenergy via the integrated web interface, app, or an API.
DRBO Greenenergy Expert Opinions
"The Shelly Pro 3EM 120A enables a new dimension of energy optimization through its high measurement resolution and compatibility with intelligent systems. Especially in conjunction with our SunLit storage solutions, customers can significantly increase their self-consumption rate and reduce grid dependency."
— Technical Team, DRBO Greenenergy
When is it worthwhile to purchase a 3-phase energy meter?
A device like the Shelly Pro 3EM 120A is particularly useful when multiple consumers or energy sources are operated simultaneously, e.g., with photovoltaic systems, heat pumps, or production facilities. It provides important data for increasing efficiency and forms the basis for sustainable energy management.
What safety and protection mechanisms are integrated?
The device complies with all relevant safety standards, including overcurrent protection, current sensor isolation, and voltage monitoring. It is robustly built and equipped with software-side safety functions that prevent incorrect measurements or system failures, making it suitable for industrial applications as well.
Why is the Shelly Pro 3EM 120A a must for energy management?
Precise measurement of energy consumption is the basis of any efficient energy planning. The Shelly Pro 3EM 120A helps to create load profiles, identify peak consumers, and optimally integrate renewable energy sources. In combination with the storage solutions from DRBO Greenenergy, a powerful and environmentally friendly system is created.
Conclusion
The Shelly Pro 3EM 120A is an excellent tool for modern energy management. With its precise measurement, easy integration, and real-time monitoring, it is suitable for both private households and commercial and industrial applications. In conjunction with solutions from DRBO Greenenergy, it becomes a powerful instrument for sustainable and efficient energy supply.
Frequently Asked Questions (FAQs)
1. Can the Shelly Pro 3EM 120A be used without the cloud?
Yes, it works locally via LAN or MQTT, even without an internet connection.
2. Does the device also measure current flows in battery storage systems?
Yes, it can capture charge and discharge values from storage systems such as DRBO Greenenergy SunLit models.
3. Is there a mobile app for control?
Yes, the Shelly App offers comprehensive control and analysis functions on smartphones.
4. Does the Shelly Pro 3EM 120A support Modbus RTU and TCP?
Yes, both protocols are integrated, simplifying connection to professional controllers.
5. How long does the installation take on average?
A qualified installer can fully assemble the Shelly Pro 3EM 120A in approximately 30-45 minutes.
Some of the information in this article comes from the internet. Product specifications may be updated at any time. For the latest information, please visit the official website or product page.
