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Key Takeaways

Best for: Home Assistant users and solar owners
Standout: Wired Ethernet plus Wi-Fi, with two-way solar readings
Watch out: DIN-rail mounting may need a small extra enclosure
Not for: Anyone wanting per-circuit data on 16 circuits

The Shelly Pro 3EM is a DIN-rail energy meter with three 120A clamps. It measures your whole home and solar production in both directions, and connects over Wi-Fi, wired Ethernet, Bluetooth or Matter. It sells for about $140 to $170.

What you need before you buy

An electrician: the clamps go around the main service wires inside the panel.
A DIN rail: most US panels do not have one, so plan on a small DIN enclosure next to the panel.
Optional Ethernet: a network cable at the panel gives the most reliable connection.

What you can track

Live and total household use, solar produced and exported, voltage and power per clamp. In Home Assistant it feeds the Energy dashboard, and Shelly scripts can switch off other devices when usage spikes.

How it compares

	Shelly Pro 3EM	Shelly EM Gen3	Emporia Vue 3
Typical price	$140–$170	$65–$75	$100–$200
Sensors	3 x 120A clamps	2 channels (one 50A clamp included)	Mains + up to 16 circuits
Connects via	Wi-Fi, Ethernet, Matter	Wi-Fi	Wi-Fi
Solar tracking	Yes	Yes	Yes
Best for	Local whole-home + solar	Budget, simple setup	Per-circuit detail

See my Shelly EM Gen3 and Emporia Vue 3 reviews.

Want to see other Energy Monitors? Compare them side by side →

How I researched this: Shelly’s Pro 3EM product page and knowledge base, the Amazon listing, and an overview video from Our Functional Home. Prices checked October 30, 2026.

Shelly Pro 3EM (120A, v2)

The Shelly Pro 3EM gives accurate whole-home and solar readings over Wi-Fi or Ethernet, and works locally with Home Assistant. Here is who it suits.

Product Brand: Shelly

Editor's Rating:
4.4

Pros

Measures whole-home use and solar in both directions, with about 1% accuracy
Wi-Fi, wired LAN, Bluetooth and Matter, so it keeps working if Wi-Fi drops
Works locally with Home Assistant, no cloud needed
Three clamps cover both legs of US split-phase service plus a solar feed
Scripts and webhooks can switch other devices when usage spikes

Cons

Mounts on a DIN rail, which most US panels lack, so you may need a small enclosure
Whole-home or a few circuits only, not 16 like the Emporia Vue 3
Setup is more technical than plug-and-play monitors
Needs an electrician to install

Specs

Model	Shelly Pro 3EM 120A (v2)
Sensors	3 x 120A split-core clamps
Accuracy	About 1% (active energy)
Measures	Consumption and production (bidirectional)
Connectivity	Wi-Fi, LAN (Ethernet), Bluetooth, Matter
Local control	Scripts, webhooks, Home Assistant, MQTT
Mounting	DIN rail
App	Shelly Smart Control (iOS, Android, web)

Verdict

The Pro 3EM is the most capable whole-home meter Shelly sells, with wired Ethernet and accurate two-way solar readings. Pick it if you run Home Assistant or want local control; if you want per-circuit detail in a simple app, the Emporia Vue 3 is easier.

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Common Questions

Does it work in a US home?: Yes. US split-phase homes use two clamps on the main legs, and the third clamp can track a solar feed or a large circuit.
Do I need an electrician?: Yes. The clamps go around the main service wires and the meter needs a wired power feed. Have a licensed electrician install it, usually in a small DIN-rail box next to the panel.
Does it need the cloud?: No. It works locally over your network with Home Assistant, and the Shelly app adds remote access if you want it.

Shelly Pro 3EM Energy Meter Review