Technology shift/Robot Vacuums/3 robots compared/Reviewed Sep 14, 2026
Robot mop washing: dock-only wash or real-time roller wash?
Full specifications20 measurements · 48 of 60 documented
The technological divide
Two architectures, two failure modes
The category has split into two architectural approaches. Each works well in some conditions and breaks down in others.
Spinning pads washed at the dock
A powered dock scrubs the pad with water jets and heat-dries it automatically between runs.
Two spinning pads mop for the whole run, then the dock rinses and dries them when the robot returns. The pads carry what they pick up until docking.
- Pads washed and dried without the owner
- Pads lift off detected carpet
- No rinse during the run itself
- Wash water temperature differs by model
Self-rinsing roller mop
The mop is rinsed and wrung out on the robot while it works, so it is not carrying the same dirty water for the whole run.
Nozzles spray clean water onto a rolling mop while a scraper pulls dirty water back into the robot, so the roller is rinsed throughout the run. The dock still washes and dries it afterward.
- Roller rinsed continuously while mopping
- Dock adds a hot wash and hot-air drying
- Roller retracts and shields on carpet
- Four dock tanks handled by hand
Where each robot sits
Does the architecture pay off?
Horizontal: where each robot sits between the two architectures. Vertical: its documented result on the headline test.
MOVA Z60 Ultra Roller CompleteContinuous
Roborock Qrevo S5VDock only
Narwal Freo Z UltraDock onlyVertical axis: documented result on Mop rinsed during the run
What each architecture can and can’t do
Capability tests
Each capability is documented from owner reports, manufacturer specifications, or third-party reviews. No in-person testing.
Roborock Qrevo S5VMOVA Z60 Ultra Roller CompleteNarwal Freo Z UltraWhat the architecture difference means
Different homes, different sensor stacks
Where each architecture fits, by condition.
Kitchens with sticky or wet spills
When a run crosses a kitchen spill before other rooms, dock-only pads carry that residue until the robot returns. The MOVA's continuous rinse and scraper take it off the roller during the pass, per MOVA's specification.
Greasy pads and cold-water washing
Where pads pick up grease, the Qrevo S5V's dock washes them in unheated water and dries them with warm air, per Roborock retail listings. The Freo Z Ultra and MOVA Z60 docks wash in heated water.
Carpet between the rooms being mopped
All three keep a wet mop off detected carpet: the Qrevo S5V lifts its pads 10 mm, the Freo Z Ultra lifts 12 mm, and the MOVA retracts and shields its roller. None publishes a maximum pile height.
Common questions