Product Library / Plugs & Outlets

Kasa Smart Wi-Fi Outdoor Plug (EP40)

Compiled by SmartHomeWorkflow Research · Kasa · Plugs & Outlets

⚠ Similar names, different products: TP-Link sells a second outdoor plug one letter away: the EP40M. The M is the version certified to the Matter standard, and that single letter decides whether the plug can join Apple Home or a Samsung SmartThings hub directly. This record is the plain EP40, which is not Matter certified. Check the letter on the box, not the picture.

Compatibility

? Inconclusive means we researched that ecosystem and the evidence doesn’t settle it — the catch says why, and the sources are listed below. It is a statement about the available evidence, never a verdict on the product. A Setup Check researches your exact setup where the official sources don’t answer.

Protocols: WIFI^[1]

Needs before it works: No hub and no bridge. What TP-Link does require is a secured wireless network on the slower 2.4 gigahertz band — the plug cannot join a 5 gigahertz network, and TP-Link states that plainly — plus the free Kasa Smart app and a Kasa account. TP-Link also states an electrical condition that is easy to skip and is about safety rather than convenience: outdoors or in a wet location the plug must go into a receptacle with ground-fault protection.^[1]

What it can do^[1]

• Alexa: On and off and scheduling only. This model has no energy monitoring, so there is no energy data for any platform to show — that gap belongs to the plug, not to the platform.

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

Subscription reality^[1]

✓ Works without a subscription: Yes.

Vendor account required: Yes — you must create a vendor account to use it.^[1]

No plan, tier or premium feature appears anywhere on TP-Link's page for this model, and the app is named as free in the system requirements. The honest limit is that this is the absence of any paywall language on one product page rather than an explicit promise never to charge — including in the scheduling and away-mode sections, which are where a vendor would normally put a gate.

Maintenance reality

• Works without the internet: Inconclusive — we read the vendor's own material and it does not answer this either way. It does not mean the product fails without the internet.
• Two independently switched outlets on one weatherproof body, with a six-inch cable so it hangs clear of the receptacle. TP-Link's stated ratings: 15 amps maximum load in total, 1,875 watts, and a 1/2 horsepower motor rating, on 802.11b/g/n wireless at 2.4 gigahertz only. Weather rating is IP64, which covers dust and splashing water rather than immersion, and the stated operating range is -4 to 122 degrees Fahrenheit at 10 to 90 percent humidity without condensation. Body measures 4.3 by 1.5 by 3.2 inches. Listed approvals are RoHS, FCC, IC, ETL and the IP64 rating. The box holds the plug with its six-inch cable, one clamp and screw, and a quick start guide. There is no energy monitoring on this model — a real difference from TP-Link's own indoor EP25, which has it.
• Security updates: Kasa publishes no security-update support date for this model. That is a gap in what the manufacturer has published, not evidence either way — some makers declare a support period and some say nothing at all.^[4]

The catch

The letter at the end of the model number is the whole decision. This is the EP40, and TP-Link also sells an EP40M — the M version is certified to the Matter standard and this one is not, which was confirmed against the certifying body's own registry with the M version present as a control. In practice that means this plug reaches Alexa and Google Assistant through TP-Link's service, and reaches Home Assistant on your own network, but has no route into Apple Home at all and no settled answer for Samsung SmartThings. Three smaller things. It joins only the slower 2.4 gigahertz band, so a network running 5 gigahertz alone will not take it. Its weather rating covers dust and splashing rather than standing water, and TP-Link says it must go into a receptacle with ground-fault protection outdoors. And there is no energy monitoring, so you cannot see what the outdoor lights are costing you.

Who it's for

A sensible pick for a household that wants two separately switched outdoor outlets on a timer or a voice command, already lives in Alexa or Google, and does not need to know how much power the load draws. Home Assistant owners get something the other platforms do not: Home Assistant talks to this plug on the home network rather than through TP-Link's service, so it keeps working in an internet outage. Look elsewhere if your home runs on Apple Home, where this model has no route at all and the Matter version of the same plug does; if Samsung SmartThings is the platform you need answered before you buy; if your wireless network runs only on the faster band; or if energy monitoring matters to you.

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 →

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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