Device Overview

Shelly EM Mini Gen4 is a compact inline energy meter for monitoring one appliance or small circuit up to 16 A. It is useful when a homeowner wants per-load energy visibility in a tight wall box or behind an outlet, rather than whole-panel monitoring with external CT clamps.

This is an energy meter only. Shelly explicitly notes that there is no relay inside, so it should be used for monitoring and automation signals rather than direct load switching.

Core Metering Fields

The official Shelly sources list 110-240 V AC supply, 0-16 A ammeter range, 16 A maximum measurement current, and 3840 W maximum measured power at 240 V. The meter reports active power and active energy, with +/-1% voltmeter and ammeter accuracy.

Because this is an inline small-circuit meter, the currentSensorSetup field is recorded as direct inline measurement through the device terminals rather than a CT clamp package. That distinction matters for comparison: it is much smaller and cheaper than a panel CT monitor, but it is not intended to replace a whole-home meter.

Installation and Fit

Shelly positions EM Mini Gen4 for retrofit locations such as wall boxes, behind outlets, switches, or other limited-space installations. It requires appropriate 16 A external protection and should be installed according to local electrical rules.

It is best suited for appliance monitoring, small-circuit analytics, load-health alerts, and Home Assistant automations based on energy usage. It is not the right fit for multi-circuit panel monitoring, three-phase service monitoring, or high-current solar import/export metering.

Connectivity and Local Control

Shelly EM Mini Gen4 supports Wi-Fi, Zigbee, Bluetooth, and Matter. Shelly documentation also lists embedded web interface access, MQTT, HTTP, WebSocket, scripting, and JSON/RPC-style data export paths. Shelly cloud can be used for remote app workflows, but the local API and local network options make it a strong fit for privacy-conscious smart-home setups.

Home Assistant support is recorded as true based on Home Assistant's Shelly integration and Shelly's own Home Assistant compatibility page. This should be understood as Shelly ecosystem / local integration support, not as a separate revenue-grade meter certification.

Strengths and Limits

Strengths:

  • Very compact 16 A inline format for tight retrofit spaces.
  • Local web/API and automation-friendly protocol support.
  • Matter, Wi-Fi, Zigbee, and Bluetooth connectivity in one small device.
  • Low official-store price compared with whole-panel monitors.

Limits:

  • Single small-circuit / appliance scope, not whole-home monitoring.
  • No relay inside; it monitors but does not switch the load.
  • No CT inputs for mains, solar, battery, or multi-circuit metering.
  • Not a source-backed solar import/export monitor, so supportsSolarImportExport is set false for this page.

Sources