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Shelly Pro 3EM-400

Shelly / SPEM-003CEBEU400

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Shelly Pro 3EM-400, product image
Image: Shelly

Does the Shelly Pro 3EM-400 work with HomeKit, Alexa, and Google Home?

The Shelly Pro 3EM-400 is a DIN-rail three-phase energy meter for 400 A current transformers.

It has Ethernet, Wi-Fi and Bluetooth, and contactor control needs a Pro add-on. It suits Home Assistant users through an integration (local Wi-Fi control).

At a glance: works withHow this is decided: cited platform facts only
HomeKit
Unknown
Unknown
Google Home
Unknown
Unknown
Alexa
Unknown
Unknown
SmartThings
Unknown
Unknown
Home Assistant
Yes[1]
Wi-Fi local, via Shelly

Key facts

Shelly Pro 3EM-400 facts

How facts are sourced: every cell cites its source below
FactValue
StatusCurrent[2][3]
List price$329.99[4] as of
GenerationPro[5]
Model codeSPEM-003CEBEU400[6]
MeasurementThree-phase or single-phase, up to 400 A per phase[6]
Current sensingCurrent transformers, 400 A[6]
Relay outputNone; contactor control through a Shelly Pro add-on[6]
MountingDIN rail[6]
RadioEthernet, Wi-Fi, Bluetooth 4.2[6]
Matterunknown
Local APIHTTP API, MQTT and webhooks[6][7]

Integration paths

How the Shelly Pro 3EM-400 connects

2 pathsHow facts are sourced: every cell cites its source below
PathRequiresiLocaliFeatures lostPlatformsi
Wi-Fi localNothing extra[1][6]Yes[1][6]unknown
Wi-Fi cloudVendor cloud account[6]No[6]unknownunknown
About these columns
Requires
Hardware the path needs beyond the device and a controller.
Local
Yes when control on this path keeps working with the internet down.
Platforms
The platforms that work with the device on this path: Native (out of the box), Via integration (needs an add-on) or Not supported.

Home Assistant and Homey

Ways to add the Shelly Pro 3EM-400

1 routeHow facts are sourced: every cell cites its source below
PlatformLeveliIntegrationDetailsEvidenceLimitations
Home AssistantNative (local)[1]shellyWi-Fi local
  • Quality: Platinum[1]
  • IoT class: Local Push[1]
  • Works with Home Assistant: Not certified[1]
Product line namedNone stated
About these columns
Level
How the device gets into the platform on this route. The headline is the best route: local before cloud, direct before bridged, core before community. The methodology page lists every level.

Cite this page

Shelly Pro 3EM-400. Smart Home Canon. https://smarthomecanon.com/devices/shelly-pro-3em-400. Last checked 2026-10-14.

Sources

  1. [1]
    DOChome-assistant.io / Shelly - Home Assistant
    Accessed Back to text
  2. [2]
    MFRshelly.com / Shelly Pro 3EM-400 - Shelly Europe shop
    Accessed Back to text
  3. [3]
    MFRshelly.com / Shelly Europe shop catalog (Shopify product feed, pages 1-4)
    Accessed Back to text
  4. [4]
    MFRus.shelly.com / Shelly USA store: Shelly Pro 3EM-400
    Accessed Back to text
  5. [5]
    MFRkb.shelly.cloud / Shelly Pro devices - Shelly Knowledge Base
    Accessed Back to text
  6. [6]
    MFRkb.shelly.cloud / Shelly Pro 3EM-400 - Shelly Knowledge Base
    Accessed Back to text
  7. [7]
    MFRshelly-api-docs.shelly.cloud / Shelly Technical Documentation
    Accessed Back to text