SONOFF S20

Wi-Fi Smart Socket

Device type

Smart Switch

Max power

1.14 W

Standby power

0.29 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 SONOFF → S20.

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: sonoff
      model: S20

Library sensor documentation

Community usage

11 opted-in installations

0.21% of 5,314 reporting installationsOpt in to analytics

Device

Manufacturer: SONOFF
Form factor: Plug
Connectivity: Wi-Fi
Barcode: 6920075701234
Power monitoring: No

Power

Power range: 0.29 – 1.14 W
Standby power on: 1.14 W

Measurement

Calculation strategy: Fixed
Measure device: Nous A1T
Measure method: Script
Measure description: Measured with utils/measure script (5min average)
Mains voltage: 230 V
Measure device firmware: ESPHome 2023.10.3

Library

Created: Oct 27, 2023, 9:03 AM UTC
Updated: Sep 13, 2026, 9:41 AM UTC
Contributors: TyzzyT
Discovery: Automatic, by entity

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SONOFF S20

Wi-Fi Smart Socket

Set up manually instead

Through the interface (recommended)

Or configure with YAML

Device

Power

Measurement

Library

Device

Power

Measurement

Library

Wi-Fi Smart Socket

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)