# Three-Phase Energy Meters The Pro 3EM from Shelly is 99% Accurate in Energy Monitoring By Colin Smith | Published 2024-03-22 | Eco Source: Trend Hunter, https://www.trendhunter.com/trends/pro-3em References: [prnewswire](https://www.prnewswire.com/news-releases/smart-home-automation-leader-shelly-launches-8-new-products-at-the-consumer-electronics-show-301715507.html) & [kb.shelly.cloud](https://kb.shelly.cloud/knowledge-base/shelly-pro-3em)  The [Shelly](https://www.trendhunter.com/trends/ht-gen3) Pro 3EM is a three-phase energy meter designed for DIN rail mounting. It features [real-time monitoring of accumulated energy](https://www.trendhunter.com/trends/energy-management-software), voltage, current, and power factor per phase. The device supports 4-quadrant measurement, allowing for the monitoring of capacitive and inductive loads. It has an accuracy class B in active energy and complies with IEC 62053-21. The Pro 3EM stores up to 60 days of data in 1-minute intervals and includes [Wi-Fi, Bluetooth, and LAN connectivity](https://www.trendhunter.com/trends/shelly-wall-display-x2i). According to Shelly, the device is over 99% accurate in its energy measurement, and it features full MODBUS support which enables seamless installation with existing devices. The standard Shelly Pro 3EM is priced at $119.90 before tax, while the Pro 3EM-400 variant costs $229.00. Customers can also opt for a Warranty Plus at an additional 10% of the product’s price. The device is available for purchase and can be ordered directly. Image Credit: Shelly ## Trend Insights (Trend Hunter) - Score: 2.0/10 - Popularity: 14% | Activity: 23% | Freshness: 22% - Audience gender: 50% men, 50% women - Primary generations: Millennial, Gen X - Top markets: North America, Europe, Asia ## Categories [Trend Hunter](https://www.trendhunter.com/trends) > [Eco](https://www.trendhunter.com/eco) > [Eco Architecture](https://www.trendhunter.com/ecoarchitecture) ## Key Themes ### Why This Trend Is Growing - **Real-time Energy Monitoring:** Opportunity to enhance operational efficiency by tracking energy consumption in real-time. - **MODBUS Connectivity Integration:** Potential for seamless integration with existing devices through full MODBUS support. - **Accurate 3-phase Monitoring:** Advancement in accuracy for monitoring three-phase energy usage with over 99% precision. ### Industries Being Reshaped - **Energy Management:** Innovation for improved energy monitoring and management in commercial and industrial settings. - **Smart Home Technology:** Integration opportunities for smart home devices to optimize energy usage and efficiency. - **Industrial Automation:** Potential for enhancing automation processes by accurately monitoring energy consumption in industrial settings. ## Related on Trend Hunter - [Wi-Fi-Connected Smart Sensors](https://www.trendhunter.com/trends/ht-gen3.md) - [Real-Time Power-Tracking Outlets](https://www.trendhunter.com/trends/shelly-plug-gen4.md) - [Next-Generation Home Energy Monitors](https://www.trendhunter.com/trends/home-energy-monitors.md) - [Smart Home Energy Monitors](https://www.trendhunter.com/trends/homey-energy-dongle.md) - [Dedicated Home Energy Managers](https://www.trendhunter.com/trends/home-energy-manager.md) - [Energy-Monitoring Smart Outlets](https://www.trendhunter.com/trends/eve-energy-outlet.md) - [RV-Focused Battery Power Monitors](https://www.trendhunter.com/trends/battery-power-monitor.md) - [Connected Environmental Sensor Systems](https://www.trendhunter.com/trends/switchbot-meter-pro.md) - [Enhanced IoT Services](https://www.trendhunter.com/trends/shelly-group.md)