Kasa KP400 Outdoor Plug (US): what it works with
TP-Link · model Kasa KP400 · For the US and Canada
- Matter Unconfirmed
- Apple Home Unconfirmed
- Google Home Yes
- Amazon Alexa Yes
- SmartThings Yes
- Home Assistant Yes
Two outlets and an IP64 rating make the Kasa KP400 an outdoor plug that joins 2.4 GHz Wi-Fi with no hub. TP-Link lists Alexa, Google Assistant and SmartThings, and Home Assistant's TP-Link integration names it and talks to it over the local network.
Checked against 2 sources on
Ecosystem compatibility
| Platform | Works? | Details |
|---|---|---|
| Matter | Unconfirmed | The TP-Link page does not mention Matter. The CSA lists a Matter "Kasa Smart Wi-Fi Outdoor Plug" without a model number, so the KP400 stays unconfirmed. Absence is not a no. |
| Apple Home | Unconfirmed | The TP-Link page does not list Apple Home or HomeKit. |
| Google Home | Yes | Listed as working with Google Assistant.[1] |
| Amazon Alexa | Yes | Listed as working with Alexa.[1] |
| SmartThings | Yes | TP-Link's spec table lists Samsung SmartThings as a supported third-party platform.[1] |
| Home Assistant | Yes | Home Assistant's TP-Link Smart Home integration lists the KP400 under power strips.[2] |
“Via Matter” means you add it with that platform's Matter controller instead of a brand skill or app. “Unconfirmed” means we couldn't find an official source either way. How we verify.
Specs that matter for setup
- Radio: 2.4 GHz only (802.11b/g/n).
- Hub: No hub required; it joins a secured 2.4 GHz network directly.
- Local control: Home Assistant's integration connects to Kasa devices on the local network without the TP-Link cloud (local polling). The Kasa app itself goes through the cloud.
- Energy monitoring: The TP-Link page does not mention energy monitoring.
- Max load: TP-Link gives 15 A at 125 V~ and no wattage; not converted. Two outlets, IP64 rated.
Before you buy
- 2.4 GHz Wi-Fi only.
- IP64 means splash-resistant; keep the outlet caps on when not in use.
- The Kasa app goes through the cloud; only Home Assistant's integration works locally.
- Energy monitoring isn't mentioned by TP-Link.
- Apple Home and Matter are not stated for this model.
Quick answers
- Does the Kasa KP400 Outdoor Plug (US) work with Apple Home?
- Not confirmed. We couldn't find an official source either way. The TP-Link page does not list Apple Home or HomeKit.
- Does the Kasa KP400 Outdoor Plug (US) work with Google Home?
- Yes. The Kasa KP400 Outdoor Plug (US) works with Google Home directly. Listed as working with Google Assistant. More smart plugs for Google Home
- Does the Kasa KP400 Outdoor Plug (US) work with Amazon Alexa?
- Yes. The Kasa KP400 Outdoor Plug (US) works with Amazon Alexa directly. Listed as working with Alexa. More smart plugs for Amazon Alexa
- Does the Kasa KP400 Outdoor Plug (US) work with SmartThings?
- Yes. The Kasa KP400 Outdoor Plug (US) works with SmartThings directly. TP-Link's spec table lists Samsung SmartThings as a supported third-party platform. More smart plugs for SmartThings
- Does the Kasa KP400 Outdoor Plug (US) work with Home Assistant?
- Yes. The Kasa KP400 Outdoor Plug (US) works with Home Assistant directly. Home Assistant's TP-Link Smart Home integration lists the KP400 under power strips. More smart plugs for Home Assistant
Sources
- Kasa Smart Wi-Fi Outdoor Plug KP400 — TP-Link manufacturer · accessed Oct 21, 2026
- TP-Link Smart Home — Home Assistant ecosystem · accessed Oct 21, 2026
Official product page: www.tp-link.com