Product Library / Plugs & Outlets

Tapo Smart Wi-Fi Outdoor Plug, Matter (P400M)

Compiled by SmartHomeWorkflow Research · Tapo · Plugs & Outlets

Compatibility

Protocols: WIFI · MATTER^[1][2][10]

What it can do^[2]

• Alexa: On/off and scheduling only. There is no energy monitoring on this model, so no energy data exists to surface in any ecosystem — a gap that is the device's, not the platform's.

Listed capabilities are what we could establish from vendor documentation. An ability missing here is unestablished — not necessarily absent.

Subscription reality^[2]

✓ Works without a subscription: Yes.

Vendor account required: Optional — there is a documented way to use it without one.^[11]

No plan, paid tier or premium feature is mentioned in TP-Link's P400M datasheet or on its product page, including in the scheduling and away-mode sections a vendor would normally gate. Recorded none on that basis; the limit is that this is the absence of paywall language in two first-party documents rather than an explicit 'no subscription' statement.

Maintenance reality^[2]

• Works without the internet: Not established — we have not sourced this yet. It does not mean the product fails without the internet.
• Two outlets, individually named and switched, on one weatherproof body. Datasheet ratings: 100–125 V~ 50/60 Hz; max load 15 A / 1800 W (general use / resistive load), 8 A incandescent, 1/6 HP motor — and note that TP-Link's product page states 1/2 HP for the same model (see theCatch). Radio: IEEE 802.11b/g/n, 2.4 GHz only; Bluetooth 4.2 is used for setup only. IP65 enclosure with a stated weatherproofing condition that is easy to miss and affects real installs: 'keep the plug face down and at least 12 inches (1ft) from the ground' and 'keep the plug covered with the weatherproof cover when not in use.' Operating range -20 °C to 50 °C (-4 °F to 122 °F), humidity 10–90% RH non-condensing. Body is V-0 (UL94) flame-retardant PC; ETL certified. Dimensions 4.2 × 3.1 × 1.6 in. Box contains the plug, a clamp, a screw and wall anchor, and the quick start guide. System requirements Android 5.0+ or iOS 10+. No energy monitoring — a real difference from TP-Link's own P210M in-wall outlet, which has it.
• Security updates: Tapo states its security-update commitment for this model as a period rather than a date: ends 3 years after the product's end-of-life date — and TP-Link's published end-of-life list covers Home and Business Networking only, so no end-of-life date exists for this smart-home model and no clock has started (UK-declared — the maker's legal commitment is filed for the United Kingdom). That is a floor measured from a starting point the manufacturer sets — a launch or a purchase — rather than a fixed end date, so it cannot be placed on a calendar here. We record the commitment as the manufacturer states it, in our words, rather than converting it into a date it did not give. This is a published commitment, not a gap in our research.^[9]

The catch

TP-Link's own two documents disagree about what this plug can drive, and if you are buying it for a pump the difference decides the purchase. The product page says 'Maximum Load: 15A, 1800W, 1/2 HP Motor'; TP-Link's own P400M(US) datasheet says '15 A Max, 1800 W Max (General Use / Resistive Load), 8 A Incandescent, 1/6 HP Motor'. That is a threefold gap in motor rating, and TP-Link's marketing copy simultaneously suggests 'swimming pool pumps' — most of which exceed both figures. This record carries the datasheet's numbers as the specification and flags the page's as the conflict; treat 1/6 HP as the number to design around until TP-Link reconciles them. Two smaller things: Matter appears in the datasheet's certification list but the product page's certification line reads 'RoHS, FCC, ETL' with no Matter, and a CSA registry entry for P400M could not be located, so the Matter claim currently rests on TP-Link's word rather than the certifying body's. And IP65 comes with conditions — face down, at least a foot off the ground, cover closed when idle. TP-Link's own US store listed it Sold out on 2026-07-29.

Who it's for

A fit for a household that wants two independently switched outdoor outlets joined to Apple Home, Alexa, Google Home or SmartThings through Matter rather than a vendor cloud, and that already owns a Matter controller for that ecosystem — a HomePod, Apple TV, Matter-capable Echo, Nest hub or SmartThings hub. Good for lights, fountains and small resistive loads within the datasheet's 15 A / 1800 W envelope. Look elsewhere if you need energy monitoring, if you have no Matter controller and want ecosystem control rather than app-only control, or if the load is a motor near either published HP figure — the conflict makes that a bad bet. Also not the plug for a 5 GHz-only network.

Sources & method

Numbered sources below back the facts marked with the matching number above. This is a research profile: compiled from manufacturer documentation, certification registries, and published testing — we state facts, not verdicts, and we have not physically tested this unit. How we work →

1. [1] tp-link.com product page for this model (read 2026-08-09): "Specifications NETWORK Protocol IEEE 802.11b/g/n, Bluetooth (for setup only) · Wireless Type 2.4 GHz WiFi Only" · prose: "Tapo app : Bluetooth Onboarding · Matter-Compatible app: Scan the Matter code". · DCL vendor resolution via tools/dcl-lookup.mjs: 'TP-Link' matches VID 4488 (TP-Link), 5009 (Kasa) and 5010 (Tapo), all legal name 'TP-Link Systems Inc.' — vendor-page research + DCL registry corroboration, verified 2026-08-09
   Backs: Protocols
2. [2] TP-Link Tapo P400M(US) 1.0 datasheet (PDF on static.tp-link.com, © 2023), read 2026-07-29 — vendor-manual research, verified 2026-07-29
   Backs: Product identity, Protocols, Maintenance, Subscription, Required hub or bridge, Capabilities
3. [3] tp-link.com/us/home-networking/smart-plug/tapo-p400m/ (first-party product page), read 2026-07-29 — vendor-page research, verified 2026-07-29
   Backs: Amazon Alexa compatibility, Google Home compatibility, Apple Home compatibility, SmartThings compatibility, Market availability, Price
4. [4] home-assistant.io/integrations/tplink (Home Assistant core integration documentation — official, local polling; supported-device list read 2026-07-29) — ecosystem-page research, verified 2026-07-29
   Backs: Home Assistant compatibility
5. [5] us.store.tapo.com listing for Tapo P400M (first-party store; reached via a 301 from us.store.tp-link.com), read 2026-07-29 — vendor-page research, verified 2026-07-29
   Backs: Price, Market availability
6. [6] CSA-IoT certified products database — searched for Tapo P400M, no matching entry located 2026-07-29 — registry-lookup, verified 2026-07-29
7. [7] TP-Link / Tapo, Announcement: IFTTT Services Ending for Tapo and Kasa Products (FAQ 1939) — vendor-page research, verified 2026-08-11
   Backs: Service status
8. [8] TP-Link Tapo P400M(US) 1.0 datasheet — vendor-documentation research, verified 2026-08-17
   Backs: Wi-Fi bands it can use
9. [9] TP-LINK SYSTEMS INC., "PSTI STATEMENT OF COMPLIANCE" (static.tp-link.com, document dated 2026-03-18), read in full 2026-08-20 — a signed regulatory declaration under Schedule 1 of the UK PSTI Regulations 2023, covering "the TP-Link brand and its subsidiaries". Its support-period rule is stated verbatim: "TP-Link will provide security updates for our products during the pre-defined support period. The defined support period will end 3 years after the product's end-of-life date." The document then carries a per-model table — Product/Model Name, Model Number, Defined Support Period — with real dates (e.g. "20/2/2029", "11/7/2027", "31/12/2029 or later*") given SEPARATELY FOR EACH HARDWARE VERSION. TP-Link's own end-of-life FAQ (tp-link.com/uk/support/faq/3562/), read the same day, defines EOL as production having "ended on the model or the specific version of the model" and lists Home Networking and Business Networking products only — no Kasa or Tapo smart-home models appear in it. The Tapo P400M appears nowhere in the table. — first-party regulatory declaration read (BQ-192 security-support sweep, method note 69 precedence) — PDF read page by page, verified 2026-08-20
   Backs: Security-update support period
10. [10] This record's existing per-model Matter evidence, re-read 2026-08-20 against the ruled definition of `protocols`: certificate CSA240D9MAT42892 · Matter over Wi-Fi. No new external source was fetched — the evidence already on this record was re-examined and this entry states what it establishes. — protocols-definition sweep (BQ-222 batch 2; ruling §1 of docs/decisions/2026-08-20-RULINGS-SITTING.md), verified 2026-08-20
    Backs: Protocols
11. [11] Tapo P400M(US)1.0 Quick Installation Guide, 7106510092 (static.tp-link.com, from TP-Link's own P400M support-download page), 'Set Up with Matter' section, read 2026-08-21; corroborated by the Tapo Matter QIG (7106510365) published on that same download page — vendor-page research, verified 2026-08-21
    Backs: Vendor account required
12. [12] SmartHomeWorkflow record maintenance (BQ-250 securitySupport.region backfill) — internal-review of the document this record already cites, verified 2026-08-27
13. [13] tp-link.com — Tapo P400M product page (Working Status and COMPATIBILITY blocks), read 2026-08-30 — vendor-page research, verified 2026-08-30
    Backs: Research status, Market availability
14. [14] TP-Link PSTI Statement of Compliance, edition dated 18/3/2026, re-read 2026-08-30. No date established; this entry records what the re-read found. — vendor-document research, verified 2026-08-30
15. [15] Record-keeping entry: the migrated research stamp was retired from this record on 2026-08-30 — internal, verified 2026-08-30

Compatibility and lifecycle information reflects the last-verified date above and can change without notice (firmware updates, cloud-service changes, discontinuations). It is provided as-is, for information — verify with the manufacturer before purchasing. Spot an error? Tell us and we'll fix it. Full terms: Terms of Service.

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