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In-depth review

TP-Link Kasa KP115 Review (2027)

In-depth review of the Kasa KP115: slim energy-monitoring plug that stacks two per outlet, with Kasa app history and a 15A rating.

TGBy TrueGear Research TeamIndependent editorial teamLast updated How we researchResearch-based assessment · Smart Plugs
Specs verified against manufacturer docs
No paid placements
Independently funded by readers
Updated 2026-10-28
TP-Link Kasa KP115 Review (2027) featured graphic
TP-Link Kasa KP115

TP-Link Kasa KP115

Kasa's slim metering plug: full energy monitoring in a body that stacks two to an outlet.

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Our verdict

The KP115 is the metering plug for people who count outlets as carefully as watts. Its slim body stacks two to a duplex where most metering plugs hog the whole receptacle, and the Kasa app delivers the real-time and historical usage data that makes monitoring worth doing. It predates Matter and skips HomeKit, which is the honest price of its maturity.

What we like

  • Energy monitoring with real-time and historical usage in the Kasa app
  • Slim body lets two plugs stack in one duplex outlet without blocking the neighbor
  • 15A / 1800W rating covers real appliances within limits
  • No hub required; joins 2.4 GHz Wi-Fi directly

What to watch out for

  • No Matter and no HomeKit support
  • Energy statistics cannot be reset inside the Kasa app
  • Wi-Fi only, with no Thread radio for congested networks

What owners report: TP-Link Kasa KP115

Synthesized from recurring themes in long-term owner feedback.

Most praised

  • Stacking two metering plugs in one duplex outlet is something the bigger metering bodies cannot do
  • Usage history in the Kasa app makes a heater or freezer habit easy to put a number on
  • Setup through the Kasa app is the usual painless few minutes owners expect from the line

Common complaints

  • There is no way to zero the energy statistics in the app, which annoys owners who move the plug between appliances
  • Apple households find no HomeKit door into this plug at all
  • The plug predates Matter, so platform changers have to leave it behind or keep the Kasa app forever

Who it is for

Kasa, Alexa, Google, and SmartThings households that want appliance cost data without sacrificing the second socket.

Metering in the Kasa app

The KP115 reports real-time consumption and keeps historical usage in the Kasa app, so a space heater's week or a freezer's month becomes a number instead of a suspicion. One quirk owners should know upfront: the statistics cannot be reset in the app, so moving the plug to a new appliance carries the old totals with it.

The slim body is the feature

At 2.62 x 1.57 x 1.5 inches, two KP115 plugs share one duplex outlet, top and bottom, which bulky metering bodies physically cannot. Behind a TV stand or in a kitchen with one free receptacle, that geometry decides whether metering happens at all.

Platforms and the Matter question

Voice and automation run through Alexa, Google Assistant, and SmartThings over plain 2.4 GHz Wi-Fi with no hub. There is no Matter and no HomeKit, so Apple-first homes and anyone rebuilding around Matter should look at the Tapo line instead; everyone else gets a proven plug with a deep app history.

Key specifications

Load rating
15A / 1800W max, 120V
Energy monitoring
Yes, real-time and history in the Kasa app
Protocol
Wi-Fi 2.4 GHz, no hub required
Dimensions
2.62 x 1.57 x 1.5 in
Platforms
Alexa, Google Assistant, SmartThings
Pack
Single plug

Also consider

TP-Link Kasa EP25

TP-Link Kasa EP25

Kasa reliability with per-plug energy monitoring and Matter-era polish.

Why consider it: The newer Kasa metering plug, in a larger body with the same app and usage history.

  • Load rating: 15A / 1800W resistive max
  • Energy monitoring: Yes, real-time and history
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TP-Link Tapo P110M Matter

TP-Link Tapo P110M Matter

Matter plus energy monitoring in TP-Link value Tapo line.

Why consider it: TP-Link's Matter metering plug, for homes standardizing on Matter over Wi-Fi.

  • Load rating: 15A / 1800W resistive max (US model)
  • Energy monitoring: Yes
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Research-based assessment. TrueGear has not hands-on tested this product; this evaluation synthesizes manufacturer specifications, retailer documentation, and published expert reviews.

Questions, answered

Can two KP115 plugs share one outlet?

Yes. The slim body is designed so two stack in a standard duplex outlet without either blocking the other, which is rare among metering plugs.

Does the KP115 work with Apple HomeKit?

No. It works with Alexa, Google Assistant, and SmartThings through the Kasa app. Apple households should choose a Matter or HomeKit plug instead.

Can it run a space heater?

Within its 15A / 1800W rating, yes, and its metering shows exactly what the heater costs to run. Follow the usual heater safety rules and never exceed the rating.

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