No lab has tested it yet, so it is not in our ranking.
Beside it, two models on sale today that come closest to it on score and price, with the same kind of station where we have them.
Green is the best of these 3, also when they share the lead.
| This model Medion X51 SW+ | Higher score, 19% cheaper Dreame D20 Air Plus Best on 6 facts | Higher score, 5% cheaper Roborock Q10 S5+ Best on 1 fact | |
|---|---|---|---|
| Price and ranking | |||
| The lowest price today at a shop that delivers to you, delivery included. A price with an asterisk comes from a shop abroad, and its delivery cost is our own estimate. Lowest price | 219 €OTTO | 179 €Amazon.de best | 209 €OTTO |
| Our own score out of 10: 60% lab tests, 25% shop ratings and 15% the maker’s facts. Price does not count. Score | not in our ranking | best | |
| The labs that have tested this model, each linked to its own review. Tests | – | Just A Dad Approved | Just A Dad Approved Vacuum Wars Tom's Guide |
| Where the model stands in our ranking, among the robots with the same kind of station. Rank | – | rank 2 of 10 with an auto-empty station | rank 3 of 10 with an auto-empty station |
| The average of the stars buyers give at the shops, with the number of reviews behind it. We only compare it from 20 reviews. Customer rating | ★ 3.8 · 29 reviews | ★ 4.3 · 151 reviews best | ★ 4.0 · 1,584 reviews |
| Mopping | |||
| How the mop is built: flat pads, two spinning discs or a roller. Discs press harder on dried-on dirt, a roller rinses itself while it works. When it matters
Source
| spinning pads | flat or vibrating pad | flat or vibrating pad |
| How far the robot lifts the mop when it drives onto a carpet. From about 10 mm a medium pile stays dry. When it matters
Source
| – | – | 8 mm |
| The robot leaves the mop at the dock before it vacuums a carpet, so the carpet never gets wet. When it matters
Source
| no (assumed) | no (assumed) | no (assumed) |
| The dock washes the mop for you, so you do not rinse it by hand. When it matters
Source
| – | no | no |
| Drying is done with warm air instead of cold. It is faster and it helps against smell. When it matters
Source
| – | – | no |
| Station | |||
| The station the robot returns to, and what it does by itself, such as emptying the bin or washing and drying the mops. Station same on all | auto-empty station | auto-empty station | auto-empty station |
| How long the maker says a dust bag lasts with daily use. With pets or a lot of carpet it is shorter. In this comparisonWhen it matters
Source
| – | up to 120 days best | up to 49 days |
| The dock can be connected to the tap and the drain, so you never fill or empty a tank. It does need a connection nearby. When it matters
Source
| – | no (assumed) | no |
| Brush and obstacles | |||
| A brush that guides hair to the side instead of letting it wind around the shaft. It saves the cutting work in homes with long hair or pets. When it matters
Source
| no (assumed) | yes (best) | yes (best) |
| How the robot sees loose things on the floor, such as cables, socks or a pet accident. A camera with depth sensing sees more than a bumper that reacts on contact. When it matters
Source
| 3D sensor (structured light) | none | 3D sensor (structured light) |
| The highest threshold the robot takes, as the maker states it. Measure your own: the step into a bathroom or onto a balcony is often higher. In this comparisonWhen it matters
Source | – | 20 mm | 20 mm |
| An extending leg or wheel that carries the robot over a high threshold. Without one it usually stops at about 2 cm. When it matters
Source
| no (assumed) | no (assumed) | no (assumed) |
| Size, noise and age | |||
| How tall the robot is. It decides whether it fits under your sofa, bed or cabinet. In this comparisonWhen it matters
Source
| 9.8 cm | 9.5 cm best | 9.9 cm |
| The noise in decibels, in the setting its source names: makers mostly give the standard setting, shops often the highest. 65 dB is like a vacuum at half power, 55 dB like a conversation. In this comparisonWhen it matters
Source
| 74 dB | 76 dB | 65 dB |
| The month the model first went on sale. It shows how old the technology in it is. On the market since | March 2026 | December 2025 | February 2025 |
Facts as the maker states them. A dash means the maker does not name it. Each model’s page gives the source of every fact. Noise is the maker’s own figure, so we do not judge it, and a customer rating only counts from 20 reviews.
On 21 October 2026 the lowest price for the Medion X51 SW+ is 219 € at OTTO, delivery to Germany included.
All prices include VAT and delivery to Germany. We may earn a commission when you buy through these links. It never changes our ranking.
OTTO For anyone wanting spinning mops, laser obstacle avoidance and a self-emptying station at a mid-range price, it is a lot of robot on paper.
The Medion X51 SW+ is a lidar robot with a self-emptying station and two spinning mops: up to 10,000 Pa of suction in the robot, a station that empties it into 3 litres, obstacle recognition with a cross-line laser, and a 175-millilitre water tank for the mops. On carpet it raises its suction by itself.
The robot is 98 millimetres tall, 350 millimetres across, with a 230-millilitre dust bin and up to 160 minutes of runtime. Medion gives 74 decibels at most, a figure on the loud side. The app takes no-go and go-to zones and a calendar.
None of our test sources has tested the X51 SW+. The station empties but does not wash the mops, so they are rinsed by hand, and Medion names no anti-tangle brush.
Based on the maker's specifications and our price data; none of our test sources has tested this model.
The numbers that matter first, then every fact by group. As published by the maker or the shop we read it from.
Medion · on the market since March 2026
Consumables: a 3 l dust bag in the station.
Dimensionsrobot and dock
From the published dimensions. The robot passes under furniture with 10 cm of clearance or more.
10,000 Pa on this model
Lowest
600 Pa Highest
42,000 Pa Middle
6,000 Pa
Higher than 579 of the 900 models we track.
Source: medion.com · checked on 7 Oct
Suction in pascal, as the maker measures it. More pascal helps on carpet, but it says little about how well the robot picks grit off a hard floor.
Source: medion.com · checked on 10 Oct
A brush that guides hair to the side instead of letting it wind around the shaft. It saves the cutting work in homes with long hair or pets. On this model: Assumed, not a stated fact: the maker's full specification does not name it, so we take it as no.
Source: medion.com · checked on 10 Oct
The side brush swings out in a corner or along a kickboard, so the dust there is swept in too. On this model: Assumed, not a stated fact: the maker's full specification does not name it, so we take it as no.
Source: medion.com · checked on 7 Oct
The robot notices when it drives onto a carpet. Most then raise their suction, and a mopping robot lifts its mop or leaves it at the dock.
Source: medion.com · checked on 7 Oct
How the mop is built: flat pads, two spinning discs or a roller. Discs press harder on dried-on dirt, a roller rinses itself while it works.
Source: medion.com · checked on 10 Oct
The pad slides out along a wall or a kickboard, so the last few centimetres are mopped as well. On this model: Assumed, not a stated fact: the maker's full specification does not name it, so we take it as no.
Source: medion.com · checked on 10 Oct
The robot leaves the mop at the dock before it vacuums a carpet, so the carpet never gets wet. On this model: Assumed, not a stated fact: the maker's full specification does not name it, so we take it as no.
Source: medion.com · checked on 7 Oct
How much clean water the robot carries. It sets how long it mops before a refill, which a dock does by itself.
Source: medion.com · checked on 7 Oct
The dock empties the robot’s dust bin, usually after every run. You only empty the dock’s bag or bin.
Source: medion.com · checked on 7 Oct
How much the dust bag in the dock holds.
Source: medion.com · checked on 7 Oct
How the robot maps your home and follows that map. Lidar measures with a laser and works in the dark, a camera looks along and recognises more.
Source: medion.com · checked on 7 Oct
How the robot sees loose things on the floor, such as cables, socks or a pet accident. A camera with depth sensing sees more than a bumper that reacts on contact.
Source: medion.com · checked on 10 Oct
An extending leg or wheel that carries the robot over a high threshold. Without one it usually stops at about 2 cm. On this model: Assumed, not a stated fact: the maker's full specification does not name it, so we take it as no.
Source: medion.com · checked on 7 Oct
How you keep the robot out of a place: a zone you draw in the app, a virtual wall or a magnetic strip on the floor.
9.8 cm on this model
Lowest
5.6 cm Highest
14.5 cm Middle
9.5 cm
Higher than 712 of the 1002 models we track.
Source: medion.com · checked on 7 Oct
How tall the robot is. It decides whether it fits under your sofa, bed or cabinet.
Source: medion.com · checked on 7 Oct
How wide the robot is. Narrower gets between chair legs more easily, wider usually means a bigger dust bin.
Source: medion.com · checked on 7 Oct
How much dust the robot holds before you empty it. It matters less with an auto-empty dock, which empties the bin after every run.
74 dB on this model
Lowest
38 dB Highest
80 dB Middle
65 dB
Higher than 435 of the 475 models we track.
Source: medion.com · checked on 7 Oct
The noise in decibels, in the setting its source names: makers mostly give the standard setting, shops often the highest. 65 dB is like a vacuum at half power, 55 dB like a conversation.
160 min on this model
Lowest
45 min Highest
360 min Middle
150 min
Higher than 512 of the 989 models we track.
Source: medion.com · checked on 7 Oct
How long the robot cleans on one charge, at its quietest setting. After that it recharges and carries on where it stopped.
Source: medion.com · checked on 7 Oct
The warranty the maker gives in Germany. Consumer law here stands apart from it and can last longer.
Source: medion.com · checked on 7 Oct
You set days and times, and the robot starts by itself, also when you are not at home.
Sources: medion.com
Yes. The station empties the robot’s dust bin after every run. The station takes a 3 l dust bag.
Yes, with two spinning mop pads.
The robot is 9.8 cm tall, so it fits under furniture with at least 10 cm of clearance.
160 minutes on its quietest setting.
2 years in Germany. Your statutory rights are separate and can last longer.
The maker
MEDION is a German brand of computers, consumer electronics and household appliances, including robot vacuums. It has developed and sold computer and multimedia products since 1983 and is based in Essen, where medion GmbH runs the brand's shops and press office. The former MEDION AG, part of the Lenovo Group since 2011, is now listed by Lenovo as Lenovo Computer AG.
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