Emporia Vue 3 vs Shelly Pro EM-50

The Shelly Pro EM-50 wins on measurement quality and integration, with plus or minus 1% Class B accuracy, Ethernet, Modbus TCP, MQTT, a local web interface, a built-in switching contact and a 3 year warranty. The Emporia Vue 3 wins on scope, with 19 channels and 16 branch clamps in the box, so it is the only one that maps an entire panel breaker by breaker.

Channel count. The Emporia Vue 3 clamps the mains plus up to 16 individual circuits, while the Shelly Pro EM-50 measures two channels on a single phase with its two included 50 A CTs. The Emporia is a whole-panel dashboard; the Shelly is a precise instrument for a specific feed or appliance.

The Shelly Pro EM-50, rated at plus or minus 1% (Accuracy Class B for active energy from 5 A to 50 A), and it also reports power factor, apparent power, frequency and voltage. The Emporia Vue 3 is specified at plus or minus 2% and does not report power factor.

The Shelly Pro EM-50 does. It stores at least 60 days of minute data on board and can be read over the LAN through its web interface, RPC, MQTT or Modbus TCP, with wired Ethernet as a backup to Wi-Fi. The Emporia Vue 3 has no local API or web interface and no local storage, so it needs an active internet connection.

Yes, in different ways. The Emporia Vue 3 does bi-directional net metering per sensor and offers excess-solar, peak-demand and time-of-use automations in its app. The Shelly Pro EM-50 does four quadrant measurement with a returned-energy counter and can divert surplus PV directly, since its potential-free contact drives a contactor.

Anyone who wants to see which breakers cost the most money without adding a device per circuit. It ships with 16 branch sensors and a 200 A main CT, supports split-phase and three-phase panels, and tracks cost and time-of-use rates. The trade is a cloud-only platform and a 1 year warranty.

Buyers who need to meter one or two circuits precisely over a wired connection with no cloud in the path, or who want the meter to switch a contactor and divert solar surplus, in a DIN rail install with a 3 year warranty.