Shelly S3SW-0A1X1EUL

1L Gen3

Device type

Smart Switch

Max power

2.366 W

Standby power

0.15 W

Sub profiles

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 → S3SW-0A1X1EUL.

Open in Home Assistant

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

Sub profile

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powercalc:
  sensors:
    - entity_id: light.my_light
      manufacturer: shelly
      model: S3SW-0A1X1EUL

Library sensor documentation

Community usage

11 opted-in installations

0.21% of 5,254 reporting installationsOpt in to analytics

Device

Manufacturer: Shelly
Description: Smart Wi-Fi Relay for No-Neutral-Wire Switches
Aliases: Shelly 1L Gen3
Form factor: In Wall
Connectivity: Wi-Fi, Matter, Bluetooth
Barcode: 3800235261637
Product page: shelly.com
Power monitoring: No

Power

Power range: 0.1 – 2.366 W
Rated power: 1.2 W claimed

Measurement

Calculation strategy: Fixed
Measure device: Shelly Plug S Gen3
Measure method: Manual
Measure description: Measured with disconnected load, for about 90 minutes and calculated average from values stored by Home Assistant. Multiple combinations of settings were tested. Firmware version 1.7.1 for the tested Shelly 1L Gen3 device. The power values are long-term averages measured while the device periodically wakes to maintain connectivity. Instantaneous power is higher during wakeups when the relay is off, but the average energy consumption is accurately reflected.
Mains voltage: 230 V
Measure device firmware: 20251113-160645/1.7.3-gb71e9ac
Measure settings: VERSION: Home Assistant Core 2025.12.5

Library

Created: Jan 5, 2026, 7:06 PM UTC
Updated: Aug 31, 2026, 12:33 PM UTC
Contributors: Victor Burlacu-Zane
Discovery: Automatic, by entity

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Shelly S3SW-0A1X1EUL

1L Gen3

Set up manually instead

Through the interface (recommended)

Or configure with YAML

Device

Power

Measurement

Library

Device

Power

Measurement

Library

1L Gen3

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)