SONOFF S31 (US) vs Kasa EP40 Outdoor Plug (US)
Smart plugs · For the US and Canada
- Both work with Google Home, Amazon Alexa and Home Assistant.
- The SONOFF S31 (US) works with SmartThings; for the Kasa EP40 Outdoor Plug (US) it isn't confirmed.
- Neither is confirmed to work with Apple Home.
- They also differ on: local control, energy monitoring and max load.
Side by side
| Fact | SONOFF S31 (US) | Kasa EP40 Outdoor Plug (US) |
|---|---|---|
| Matter | Unconfirmed[6] | Unconfirmed |
| Apple Home | Unconfirmed | Unconfirmed |
| Google Home | Yes[1],[2] | Yes[1],[2] |
| Amazon Alexa | Yes[1],[2] | Yes[1],[2] |
| SmartThings | Yes[3],[4],[5] | Unconfirmed |
| Home Assistant | Yes[7],[8],[9] | Yes[3] |
| Radio | Wi-Fi[1],[3] | Wi-Fi[1],[2] |
| Hub required | No[1] | No[1],[2] |
| Local control | Unconfirmed | Yes[3] |
| Energy monitoring | Yes[1],[2] | Unconfirmed |
| Max load | 1,800 W[1],[3] | 1,875 W[1],[2] |
A bar on the left marks the rows where they differ. Numbers in brackets lead to the source on each device's own page, which also has the notes and what to check before you buy. Checked against official sources; the older of the two records was verified on . How we verify.
Quick answers
- SONOFF S31 (US) or Kasa EP40 Outdoor Plug (US): which works with Apple Home?
- Not confirmed for either: we couldn't find an official source either way.
- SONOFF S31 (US) or Kasa EP40 Outdoor Plug (US): which works with Google Home?
- Both work with Google Home directly. More smart plugs for Google Home
- SONOFF S31 (US) or Kasa EP40 Outdoor Plug (US): which works with Amazon Alexa?
- Both work with Amazon Alexa directly. More smart plugs for Amazon Alexa
- SONOFF S31 (US) or Kasa EP40 Outdoor Plug (US): which works with SmartThings?
- Confirmed only for the SONOFF S31 (US). The SONOFF S31 (US) works directly; the Kasa EP40 Outdoor Plug (US) isn't confirmed either way. More smart plugs for SmartThings
- SONOFF S31 (US) or Kasa EP40 Outdoor Plug (US): which works with Home Assistant?
- Both work with Home Assistant directly. More smart plugs for Home Assistant
Full details and sources: SONOFF S31 (US) · Kasa EP40 Outdoor Plug (US)