The Shelly Pro Series 3EM is a versatile power and energy meter designed for efficient monitoring in a variety of environments. With the ability to measure power on three channels and three phases, it provides insight into energy consumption and helps users effectively manage their electricity consumption. The device has a robust plastic construction and operates in a temperature range of -20 °C to 40 °C, making it suitable for even the most demanding conditions. The meter includes connectivity options, including wireless protocols such as Bluetooth 4.2 and Wi-Fi (802.11b/g/n), as well as wired Ethernet. Designed for installation, the 3EM mounts on a DIN rail, ensuring compatibility with existing systems. In addition, with built-in features such as CoAP and MQTT support, it enables communication with smart home devices and simplifies automation and management. The Shelly 3EM is a tool for users who want to optimize energy consumption while ensuring reliable operation.

It is important to know

SHELLY Pro 3EM 120A V2 is an advanced three-phase energy meter that can connect via Ethernet, Wi-Fi or Bluetooth, making it particularly interesting for users who want to monitor electricity consumption without additional central hubs. Before purchasing, it is crucial to understand the integration options into your smart home system and the practical limitations regarding connectivity and DIN rail mounting location. Also pay special attention to how the data will be used - for analytics, automation or just monitoring.

• Since it does not require an additional control panel, it is suitable for users who want to get up and running quickly without complicated setup or ecosystem expansion.
• Multiple connection methods (Ethernet, Wi-Fi, Bluetooth) allow for installation flexibility, but require a good internet or local network for stable operation and remote access.
• DIN rail mounting means it is primarily suitable for electrical cabinets; before purchasing, check the available space and power supply accessibility in the cabinet.
• Advanced monitoring features are useful for those who want accurate consumption measurement and potential inclusion in automation scenarios, but it requires a basic understanding of network connections and configuration.

Source of editorial recommendations: ENAA guides and team experience.

In practice

🟢 Monitoring three-phase consumption in a household or small business

The device enables precise monitoring and analysis of three-phase electricity consumption, which is especially useful for larger household consumers and commercial premises.

🟢 Remote monitoring via Wi-Fi or Ethernet

Direct connection via Wi-Fi or Ethernet allows remote monitoring of data in real time without the need for an additional control panel, simplifying digital consumption monitoring.

🟢 Use without a smart home center

SHELly Pro 3EM V2 can operate completely independently because it does not require an additional hub or smart control panel for basic operation.

🟡 Inclusion in complex smart home automation

Connection to more advanced automation systems is possible, but without a central system or unified ecosystem, you may encounter certain integration limitations.

🟡 Remote access within unstable networks

With a weak or unstable Wi-Fi signal and uncontrolled internet connections, data transfer may be less reliable, so we recommend a verified infrastructure before installation.

Answers to frequently asked questions

Can I use SHELLY Pro 3EM 120A V2 without a smart control panel or app?

Yes, the device works independently and does not require an additional control unit for basic measurement and monitoring of energy consumption.

Which connection method is the most stable for remote monitoring?

For the most reliable operation, it is recommended to use a wired connection via Ethernet, as it reduces the chances of connection drops compared to wireless Wi-Fi or Bluetooth.

Where is the most suitable place to install the device?

The device is intended for mounting on a DIN rail, which is usually inside electrical cabinets, so it is necessary to check the available space and power supply at the intended location in advance.

Does SHELLY Pro 3EM 120A V2 support integration into smart home automation scenarios?

Integration options exist, but advanced automations are more limited without a coordinated ecosystem or central smart home system.

Description updated: September 2026

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