Roborock
Comparison · 2 robots
Roborock Qrevo Master · Roborock S8 Max Ultra with Refill & Drainage System
All robot vacuums. Every measure below is plotted against the full class, so a difference can be read against how much the class itself varies.
- Roborock Qrevo Master
- Roborock S8 Max Ultra with Refill & Drainage System
01 Classification
What each one does on its own.
The Autonomy Ladder is the same five rungs for every robot on the site. A rung describes the conditions a robot handles without you, not how good it is.
V
Generalized
Any task, any setting
IV
Environmental
Handles new obstacles without help
III
Conditional
Finishes familiar jobs on its own
Roborock Qrevo MasterRoborock S8 Max Ultra with Refill & Drainage System
II
Assisted
Runs preset routines, needs rescue
I
Manual
One action, on command
02 Assessment
Where they actually differ.
The Robovations Score is nine inputs across three pillars, each weighted as shown and each scored so that more is better. A robot can lead on one and trail on another, which is the point of showing them apart. Cost of ownership and data handling are reported on each robot's own page and are never averaged into the score.
Capability
Task completion16% of score
Does it finish the job it is sold to do, unattended
7874
- Roborock Qrevo Master78
- Roborock S8 Max Ultra with Refill & Drainage System74
18median 72 across 429 scored robots100
Coverage and navigation10% of score
Does it work the whole area, and hold that between runs
8678
- Roborock Qrevo Master86
- Roborock S8 Max Ultra with Refill & Drainage System78
0median 70 across 417 scored robots100
Edge-case recovery10% of score
Does it recover from the failures its category presents
4868
- Roborock Qrevo Master48
- Roborock S8 Max Ultra with Refill & Drainage System68
18median 52 across 318 scored robots100
Operating envelope4% of score
How far conditions can vary before performance drops
7570
- Roborock Qrevo Master75
- Roborock S8 Max Ultra with Refill & Drainage System70
28median 68 across 393 scored robots100
Dependability
Field failure rate16% of score
Documented hardware failures per owner-year
7770
- Roborock Qrevo Master77
- Roborock S8 Max Ultra with Refill & Drainage System70
6median 70 across 355 scored robots100
Software stability14% of score
Whether updates fix more than they break
7465
- Roborock Qrevo Master74
- Roborock S8 Max Ultra with Refill & Drainage System65
15median 65 across 340 scored robots100
Support longevity10% of score
Committed parts, service and updates, with dates
8862
- Roborock Qrevo Master88
- Roborock S8 Max Ultra with Refill & Drainage System62
0median 62 across 425 scored robots100
Ownership burden
Routine maintenance12% of score
Hands-on time it asks for in normal operation
8788
- Roborock Qrevo Master87
- Roborock S8 Max Ultra with Refill & Drainage System88
22median 67 across 430 scored robots100
Consumables8% of score
Parts that must be bought to keep it working
6964
- Roborock Qrevo Master69
- Roborock S8 Max Ultra with Refill & Drainage System64
8median 69 across 430 scored robots100
03 Measured against the class
How far apart is a long way?
A number only means something next to the spread it sits in. Each track below is the real range across every classified robot in the class, with the median marked.
Price214 with a published figure
$1,599$1,699.99
- Roborock Qrevo Master$1,599
- Roborock S8 Max Ultra with Refill & Drainage System$1,699.99
$160median $799.99$2,599
Suction207 with a published figure
10,000 Pa8,000 Pa
- Roborock Qrevo Master10,000 Pa
- Roborock S8 Max Ultra with Refill & Drainage System8,000 Pa
1,000 Pamedian 10,000 Pa42,000 Pa
Runtime186 with a published figure
180 min180 min
- Roborock Qrevo Master180 min
- Roborock S8 Max Ultra with Refill & Drainage System180 min
60 minmedian 180 min360 min
Height223 with a published figure
4.1 in3.8 in
- Roborock Qrevo Master4.1 in
- Roborock S8 Max Ultra with Refill & Drainage System3.8 in
2.6 inmedian 3.8 in7.8 in
Not compared, because fewer than two of these robots carry a published figure: Charge time, Noise, Weight.
04 Ownership
What the numbers leave out.
The trade-off
What each design gives up to be good at what it is good at.
Roborock Qrevo Master
The retractable arm adds capability at the cost of dock complexity. Mop-pad alignment and rotating-mechanism maintenance will dominate the hands-on effort, not the base autonomy.
Self-washing pads trade a chore for a consumable. The station rinses and dries the pads after each run instead of leaving that to the sink, and the pads still wear out and get replaced; a stationary pad you wash yourself lasts longer between purchases because it spends less time in a wash cycle.
Roborock S8 Max Ultra with Refill & Drainage System
The dock takes over every water chore, and in exchange it needs plumbing work before its first run.
Structured-light obstacle avoidance keeps a camera out of the home; Vacuum Wars found the camera model avoided obstacles better.
Who each one is wrong for
Stated by the record itself. A robot being wrong for a household is a fact about fit, not a fault.
Roborock Qrevo Master
- Renters or frequent-move situations
- The station is 340 mm (13.4 in) wide and needs a patch of floor against a wall with an outlet. Nothing is plumbed or permanently installed: the 4L clean and 3.5L dirty water tanks lift out and are filled and emptied by hand, and setup is plugging it in and filling the clean tank. What it costs is fixed floor area, which a small apartment may not have to give.
- High-pile or shag carpet homes
- Rotating pads are designed for hard and low-pile surfaces. Manufacturer documentation does not recommend use on high-pile carpet.
- Owners wanting minimal dock maintenance
- Mop pad washing, dust auto-empty, and water tank refills require monthly water tank cleaning and quarterly filter replacement to prevent odor and motor load.
Roborock S8 Max Ultra with Refill & Drainage System
- Renters or homes without a nearby water line and drain
- The dock must connect to a water supply and a drain within Roborock's stated distances, which many layouts cannot provide.
- Buyers who want a camera for obstacle recognition
- It uses structured light rather than a camera, and Vacuum Wars found the camera-equipped S8 MaxV Ultra avoided obstacles better.
- Dock sites behind a threshold over 2 cm
- Roborock's installation guidance warns against thresholds, tracks or steps above 2 cm between the dock and the cleaning area.
- Buyers who need an independent test of the plumbed version
- Vacuum Wars tested the standard-dock S8 Max Ultra and said it had not reviewed the refill and drainage variant.
What stays your job
The upkeep ownership hands back to you, whatever the autonomy level says.
Roborock Qrevo Master
- Weekly: Empty the station’s dirty-water tank and refill the clean-water tank; clear hair from the wheels and main brush.
- Monthly: Rinse the wash tray and the station’s water path; wipe out both tanks.
- Every 3-6 months: Replace the mop pads once the pile has matted (~$30-40 per pair); replace the main brush and side brush if matted (~$25-35 for a brush kit).
- Every 6-12 months: Replace the filter; two spares ship in the box.
- As needed: Replace the station’s dust bag when it is full.
Roborock S8 Max Ultra with Refill & Drainage System
- As needed: Replace the 2.5 L dock dust bag; Roborock sells 6-packs.
- Every 3-6 months: Refill the 580 ml detergent tank, which Roborock says lasts over three months.
- As needed: Check the water inlet and drain connections for leaks, per Roborock’s installation notes.
- As needed: Replace mop cloths and edge mop cloths; Roborock’s US store sells both.
- As needed: Replace the washable filters and main brush pack, which Roborock’s US store sells for the S8 Max Ultra.
05 Evidence
How much each of these is standing on.
Classifications rest on different depths of evidence. A pre-release assessment and a verified one are not the same kind of claim.
| Robot | Evidence status | Sources reviewed | Last assessed |
|---|---|---|---|
| Roborock Qrevo Master | Pending | 4 | Sep 2026 |
| Roborock S8 Max Ultra with Refill & Drainage System | Provisional | 5 | Sep 2026 |
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