Meross Smart Plug Mini vs Roborock S9 MaxV: Is the 2025 Model Worth the Change?
Meross Smart Plug Mini or Roborock S9 MaxV? We compare price, measured performance and real-world trade-offs to work out which is the better buy.
Maya Okonkwo
The short answer
Meross Smart Plug Mini at Single-socket footprint against Roborock S9 MaxV at 6400mAh. Where they part company is who they suit: the Meross Smart Plug Mini is the one to get if you are anyone starting a smart home without committing to an ecosystem, the Roborock S9 MaxV if you are households with pets, hard floors and no patience.
Price difference: The Meross Smart Plug Mini undercuts the Roborock S9 MaxV by £1187. That gap only matters if the extras below are ones you will actually use.
Specifications side by side
| Specification | Meross Smart Plug Mini | Roborock S9 MaxV |
|---|---|---|
| Price | £12 | £1199 |
| Our score | 4 / 5 | 4 / 5 |
| Protocols | Matter over Wi-Fi | — |
| Rating | 13A | — |
| Energy monitoring | Yes | — |
| Size | Single-socket footprint | — |
| Suction | — | 10,000Pa |
| Navigation | — | LiDAR plus dual-camera |
| Mopping | — | Dual spinning pads, auto-lift |
| Dock | — | Self-empty, wash and dry |
| Battery | — | 6400mAh |
How we tested
Every figure quoted above comes from the same protocol, run on every unit in this category. This one spent a month installed in a real home, not a bench. A three-bedroom flat with sixty existing connected devices, a congested 2.4GHz band, and deliberate router reboots to see what recovers on its own.
| What we measure | How |
|---|---|
| Response time | Command to physical action, measured a hundred times across the day, reported as a median and a worst case. |
| Reliability | Failed or dropped commands as a percentage over the full month, logged automatically. |
| Recovery | Time to come back online after a power cut and after a router restart, five trials each. |
| Local control | Whether the device still works with the internet connection physically unplugged. |
| Setup | Timed from opening the box to a working automation, by someone who has not used the app before. |
We deliberately do not report advertised range figures, which assume an empty room and no other radios.
The honest caveat: Every home’s radio environment is different. Reliability here is a strong signal, not a guarantee.
Where the Meross Smart Plug Mini wins
- Matter support at an unusually low price
- Genuinely compact so it does not block the second socket
- Energy monitoring included
It also has the edge on the intangibles: Matter support at twelve pounds makes the ecosystem question largely moot.
Where the Roborock S9 MaxV wins
- An extending side brush that genuinely cleans edges and corners
- Excellent obstacle avoidance
- A dock that handles emptying, washing and drying
And in day-to-day use, it cleared a cable, two shoes and a charging brick across ten runs.
The trade-offs
Neither is flawless. The Meross Smart Plug Mini has one clear weak point — 2.4GHz Wi-Fi only — and the Roborock S9 MaxV has its own: very expensive. Weigh those against how you actually work rather than against the spec sheet.
The value case
Both scored 4 out of 5, and the Meross Smart Plug Mini costs £1187 less. Unless an extending side brush that genuinely cleans edges and corners is specifically what you need, the cheaper one is the better buy and we would not agonise over it.
If neither quite fits
Look at the Nest Doorbell (wired, 2nd gen) at £179 — it scored 4 out of 5 and suits households expecting deliveries who want reliable package alerts. If the budget will not stretch, the Aqara Presence Sensor FP2 at £74 is the cheapest option in this category we would still put our name to.
Living with each of them
On paper the gap looks like a specification difference; in use it is a habits difference. With the Meross Smart Plug Mini the thing you adjust to is 2.4GHz Wi-Fi only, and you do adjust — within a week it stops registering. Its protocols (Matter over Wi-Fi) is the part you stop thinking about. The Roborock S9 MaxV asks for a different accommodation: very expensive, against a suction of 10,000Pa that holds up better than the number suggests. Neither compromise is severe. They are simply different, and which one you would rather not think about is a more useful question than which is objectively smaller.
Which one ages better
The Roborock S9 MaxV is 1 year newer, which usually means 1 more year of security updates at the far end of ownership — the part of the decision nobody weighs at the till and everybody feels at year four. The other half of ageing is the weak point you already know about: very expensive on one side, 2.4GHz Wi-Fi only on the other. Weaknesses of that kind do not improve with firmware, so assume you are buying them for the life of the device and price the decision accordingly.
Our recommendation
For most people we would take the Meross Smart Plug Mini, which scored 4 out of 5 in our testing against 4 for the other. That said, a score is a summary, not a substitute for knowing what you need.
Buy the Meross Smart Plug Mini for matter support at an unusually low price. Buy the Roborock S9 MaxV for an extending side brush that genuinely cleans edges and corners.
Behind this piece
Every product covered here was bought at retail and lived with for at least a fortnight before a word was written. Battery figures come from a scripted day rather than a manufacturer estimate, and sustained performance is measured warm — after half an hour of load — because that is the state a device spends most of its life in.
Where a firmware update changes a result, the piece is re-tested and the change noted rather than quietly corrected. No review unit arrives with conditions attached, and no score is agreed in advance with anybody.
Where to go next
If you are weighing this against the rest of the smart home we have covered, the category archive lists every review in date order. The closest comparisons we have published are Meross Smart Plug Mini: Battery Draining Faster Than It Should and Meross Smart Plug Mini: Bluetooth Keeps Disconnecting.
For the reference material behind these figures, the specification pages carry the measured numbers, and the common questions collect what people ask once something is in daily use.
