Why it fits
Shelly 3EM suits homes and small sites that need clearer visibility into three-phase usage, solar production, or a few important single-phase circuits without committing to a heavier installer-only monitoring platform.
What stands out
It measures three channels with included 120 A current transformers, supports bidirectional energy tracking, and can also watch three separate single-phase circuits. Shelly positions it as a flexible meter for energy saving, solar-aware monitoring, EV-related load tracking, and contactor control.
Connectivity and control
The device works over Wi-Fi and supports local-facing options including an embedded web interface plus MQTT, CoAP, and REST-style control. That makes it more attractive for Home Assistant users and other buyers who want cloud-optional control rather than app-only monitoring.
Best fit
Choose Shelly 3EM when you want a CT-based three-phase monitor with local protocol support, contactor control, and better DIY-friendly smart-home flexibility than many inverter-tied or Modbus-only meter options.