Smart Plugs / Kasa Matter Smart Outdoor Plug EP40M vs Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack)
Kasa Matter Smart Outdoor Plug EP40M vs Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack)
Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack)
Matter done properly — except the energy monitoring never leaves the Kasa app.
Wins overall by 1.0 points
Quick Verdict
The Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) takes this by a clear 1.0 points. Matter done properly — except the energy monitoring never leaves the Kasa app. The Kasa Matter Smart Outdoor Plug EP40M only makes sense if it wins on a category you care about more than the total.
The Kasa Matter Smart Outdoor Plug EP40M and Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) are both closely matched smart Plug models, and the Kasa Matter Smart Outdoor Plug EP40M is $11.90 cheaper than the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) ($25.99 vs $37.93). On Energy Monitoring, the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) leads (8.0 vs 0.0/10) — whether power is genuinely measured, what quantities are reported, and where you can see them. On Load Headroom, the Kasa Matter Smart Outdoor Plug EP40M leads (7.5 vs 4.5/10) — how much of the nameplate 15A you can actually use continuously, and what the plug is rated to do with motors, compressors and heaters — the spec buyers most often get caught by. On Size & Fit, the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) leads (9.0 vs 6.0/10) — whether it blocks the second outlet on a duplex receptacle, and how it mounts. Overall, the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) scores 8.0/10 across our 8 scoring categories versus 7.0/10 for the Kasa Matter Smart Outdoor Plug EP40M. Below, we break down the full spec sheet, category-by-category scores, and exactly who should buy which one.
Side-by-Side Comparison
| Spec | Kasa Matter Smart Outdoor Plug EP40M | Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) |
|---|---|---|
| Price | $25.99 | $37.93 |
| Release Year | 2024 | 2023 |
| Max Load | 15A / 1,875W total, shared across both outlets | 15A / 1,800W at 120V |
| Motor / Inductive Rating | 1/2 HP | Not published by TP-Link for the KP125M |
| Energy Monitoring | No — TP-Link staff confirmed on its own forum that it cannot be added by firmware and closed the request as Declined | Yes, measured — but only visible in the Kasa app; the Matter integration does not expose it |
| Radio & Protocol | Matter over Wi-Fi (2.4GHz), Bluetooth for commissioning | Matter over Wi-Fi (2.4GHz), Bluetooth for commissioning |
| Hub Required | No for the Kasa app; a Matter controller is required for Apple/Google/SmartThings | No for the Kasa app; a Matter controller (HomePod, Apple TV, Echo, Nest Hub, SmartThings) is required to use it in Apple/Google/SmartThings |
| Works Without Internet | Yes — Matter control is local and Kasa keeps LAN control | Yes — Matter commands are local, and Kasa keeps LAN control |
| Switched Outlets | 2✓ | 1 |
| Pack Size | 1 | 4 |
| Price per Switched Outlet ($) | 13 | 9.48✓ |
| Dimensions | 110 x 39 x 81 mm (4.33 x 1.54 x 3.19 in) | Not published by TP-Link on the US KP125M product page |
| Blocks Second Outlet | Not applicable — mounts on its own clamp rather than sitting on a duplex receptacle | No — TP-Link markets it as mini-sized specifically to avoid blocking the adjacent socket |
| Weather Rating | IP64, ETL certified, -4°F to 122°F. The IP64 figure covers the sealed body; TP-Link publishes no rating for a socket with a cord inserted and the sockets are meant to face down | Indoor only |
| Warranty | 24 months | 24 months |
| Colors | Black | White |
Category Scores
Load Headroom
The Kasa Matter Smart Outdoor Plug EP40M leads clearly here, 7.5 against 4.5 — a 3.0-point margin on how much of the nameplate 15A you can actually use continuously, and what the plug is rated to do with motors, compressors and heaters — the spec buyers most often get caught by. If that is what you are buying for, the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) does not close the gap elsewhere.
Energy Monitoring
The Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) leads clearly here, 8.0 against 0.0 — a 8.0-point margin on whether power is genuinely measured, what quantities are reported, and where you can see them. If that is what you are buying for, the Kasa Matter Smart Outdoor Plug EP40M does not close the gap elsewhere.
Ecosystem Support
The Kasa Matter Smart Outdoor Plug EP40M and Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) are level here, at 9.0/10 each. matter, HomeKit, Alexa, Google, SmartThings and Home Assistant coverage is not what separates these two — look to the categories where the scores diverge.
Local Control
The Kasa Matter Smart Outdoor Plug EP40M and Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) are level here, at 8.5/10 each. whether switching and schedules survive an internet outage, or depend on a vendor cloud is not what separates these two — look to the categories where the scores diverge.
Size & Fit
The Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) leads clearly here, 9.0 against 6.0 — a 3.0-point margin on whether it blocks the second outlet on a duplex receptacle, and how it mounts. If that is what you are buying for, the Kasa Matter Smart Outdoor Plug EP40M does not close the gap elsewhere.
Build & Safety
The Kasa Matter Smart Outdoor Plug EP40M and Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) are level here, at 8.5/10 each. certification, flame-retardant housing, overload protection, recall history and warranty is not what separates these two — look to the categories where the scores diverge.
App & Automation
The Kasa Matter Smart Outdoor Plug EP40M and Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) are level here, at 8.0/10 each. scheduling, away modes, sunrise/sunset triggers and how good the controlling app is is not what separates these two — look to the categories where the scores diverge.
Value
The Kasa Matter Smart Outdoor Plug EP40M and Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) are level here, at 8.5/10 each. what a switched, metered outlet actually costs once the pack size and any required hub are counted is not what separates these two — look to the categories where the scores diverge.
Best For
Choose the Kasa Matter Smart Outdoor Plug EP40M if…
- • Load Headroom matters most to you — the Kasa Matter Smart Outdoor Plug EP40M scores 7.5/10 here (how much of the nameplate 15A you can actually use continuously, and what the plug is rated to do with motors, compressors and heaters — the spec buyers most often get caught by).
- • You want to spend less — it's $11.90 cheaper.
- • Your main use case is outdoor.
Choose the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) if…
- • Energy Monitoring matters most to you — the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) scores 8.0/10 here (whether power is genuinely measured, what quantities are reported, and where you can see them).
- • Size & Fit matters most to you — the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) scores 9.0/10 here (whether it blocks the second outlet on a duplex receptacle, and how it mounts).
- • Your main use case is indoor-mini or energy-monitoring.
Pros & Cons
Kasa Matter Smart Outdoor Plug EP40M
Pros
- +1/2 HP motor rating — three times the EP25's, which matters for pond pumps and inflatables
- +Two outlets you can schedule separately, so lights and a pump are not tied together
- +Matter multi-admin plus a wide -4°F to 122°F operating range for real winter use
- +2-year warranty, unusual for outdoor gear at this price
Cons
- −No energy monitoring at all, and TP-Link has publicly refused to add it — the cheaper indoor Kasa plugs meter, this does not
- −IP64 is splash resistance, not immersion; a plug sitting in standing water or snowdrift is outside the rating
- −15A is the total for the pair, not per outlet — two 1,000W devices will trip it
- −Needs a Matter controller for Apple, Google or SmartThings; only the Kasa app works standalone
Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack)
Pros
- +Matter multi-admin means the same plug can live in Apple Home and Alexa simultaneously — the Kasa EP25 cannot
- +Matter on/off is handled locally, so it survives an internet outage
- +Street price has fallen to roughly half the $69.99 launch MSRP for the 4-pack
- +2-year warranty and UL certification
Cons
- −The headline energy monitoring is invisible over Matter — you must install the Kasa app alongside your chosen platform to see a single watt
- −TP-Link does not publish a motor/HP rating for this model, so inductive loads are a guess
- −Needs a Matter controller you may not own; the plug alone does nothing in Apple Home without a HomePod or Apple TV
- −Amazon 4-pack pricing swings between roughly $37 and $43, so per-unit comparisons against 2-packs are unstable
Shop by Need
FAQs
Is the Kasa Matter Smart Outdoor Plug EP40M or Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) better overall?+
Based on our 8-category scoring, the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) comes out ahead overall. See the full breakdown in the scores section above — the right pick still depends on which categories matter most for your use case.
Which is better for Energy Monitoring, the Kasa Matter Smart Outdoor Plug EP40M or the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack)?+
The Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) scores higher on Energy Monitoring (8.0/10 vs 0.0/10) — whether power is genuinely measured, what quantities are reported, and where you can see them.
Which is better for Load Headroom, the Kasa Matter Smart Outdoor Plug EP40M or the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack)?+
The Kasa Matter Smart Outdoor Plug EP40M scores higher on Load Headroom (7.5/10 vs 4.5/10) — how much of the nameplate 15A you can actually use continuously, and what the plug is rated to do with motors, compressors and heaters — the spec buyers most often get caught by.
Which is better for Size & Fit, the Kasa Matter Smart Outdoor Plug EP40M or the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack)?+
The Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) scores higher on Size & Fit (9.0/10 vs 6.0/10) — whether it blocks the second outlet on a duplex receptacle, and how it mounts.
Which is better for Ecosystem Support, the Kasa Matter Smart Outdoor Plug EP40M or the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack)?+
The Kasa Matter Smart Outdoor Plug EP40M scores higher on Ecosystem Support (9.0/10 vs 9.0/10) — matter, HomeKit, Alexa, Google, SmartThings and Home Assistant coverage.
Is the Kasa Matter Smart Outdoor Plug EP40M worth the price difference over the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack)?+
The Kasa Matter Smart Outdoor Plug EP40M is the cheaper option at $25.99 versus $37.93. Whether the pricier model is "worth it" depends on how much you value its lead in Energy Monitoring.
Which is better suited to my use case?+
The Kasa Matter Smart Outdoor Plug EP40M is the better fit if you mainly care about outdoor. The Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) is the better fit for indoor-mini or energy-monitoring.
What's the warranty on the Kasa Matter Smart Outdoor Plug EP40M vs the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack)?+
The Kasa Matter Smart Outdoor Plug EP40M ships with a 24-month warranty; the Kasa Matter Smart Plug KP125M (KP125MP4 4-Pack) ships with a 24-month warranty. Always confirm current terms on the manufacturer's site before buying.
Should I wait for the next model instead of buying either of these?+
If either model is more than two years old, a successor may be close — check the "Latest Model" link on each product page. Otherwise, both are current, well-supported options and there's no strong reason to wait.
Premium Option
Eve Energy (Matter, US) — $39.95
Specifications and prices for both products last verified . Scores are calculated from published specifications — see how we compare products.