Shelly SHEM

EM

Device type

Smart Switch

Max power

0.923 W

Standby power

0.598 W

View discovery and setup instructions for this profile.

Powercalc can discover this model automatically (by entity). Look for a discovery prompt in Home Assistant and accept it to create the sensors. About discovery

Through the interface (recommended)

Start the Powercalc config flow, choose Virtual power (library), and pick Shelly → SHEM.

Open in Home Assistant

Add this to your configuration.yaml, replacing light.my_light with your own entity.

powercalc:
  sensors:
    - entity_id: light.my_light
      manufacturer: shelly
      model: SHEM

Library sensor documentation

Community usage

62 opted-in installations

1.17% of 5,304 reporting installationsOpt in to analytics

Device

Manufacturer: Shelly
Description: Smart Wi-Fi Energy Meter with Contactor Control
Aliases: Shelly EM
Form factor: In Wall
Connectivity: Wi-Fi
Barcode: 3800235262207
Product page: kb.shelly.cloud
Power monitoring: Yes

Power

Power range: 0.598 – 0.923 W
Rated power: 1 W claimed
Standby power on: 0.923 W

Measurement

Calculation strategy: Fixed
Measure device: Shelly PM Mini Gen3
Measure method: Manual
Measure description: The measured device fw: 1.14.1-rc1, Eco Mode enabled, Wifi Client enabled, LED disabled, one measurement clamp connected. The result represents the average value of measurements collected from the measurement device API for the following scenarios: dumb device/baseline consumption (~4.9W), the relay turned off, and the relay turned on.
Mains voltage: 230 V
Measure device firmware: 20241011-114503/1.4.4-g6d2a586
Measure settings: SAMPLE_COUNT: 200SLEEP_TIME: 0.5

Library

Created: Jan 6, 2024, 9:34 PM UTC
Updated: Sep 13, 2026, 9:41 AM UTC
Contributors: Michal Bartak
Discovery: Automatic, by entity
Only self usage: Yes

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Shelly SHEM

EM

Set up manually instead

Through the interface (recommended)

Or configure with YAML

Device

Power

Measurement

Library

Device

Power

Measurement

Library

EM

Set up manually instead

Through the interface .css-bxmwoh{margin:0;font-family:"Roboto","Helvetica","Arial",sans-serif;font-weight:400;font-size:0.875rem;line-height:1.43;letter-spacing:0.01071em;}(recommended)

Or configure with YAML

Or configure with YAML

Device

Power

Measurement

Library

Device

Power

Measurement

Library

Through the interface (recommended)