Robot vacuums

Flat pads, spinning mops or a roller: which robot mop system fits your floors?

Published November 3, 2026 · By the BotLineup editors · Prices and specs as of that date, from the pages under Sources

Three ways a robot mops

The simplest system clips a fabric pad onto a bracket under the robot, and the pad drags across the floor. Spinning systems use two round pads that rotate as the robot moves. Roller systems use a cylinder that turns against the floor and gets rinsed while the robot works. Each design changes how much you handle wet cloth, what the dock has to do and how the robot behaves at a rug.

Flat pads

The SwitchBot K20+ Pro is an example of the pad-kit approach. SwitchBot's US product page lists a "Mopping Kit (Mop Pad Pack, Mop Bracket)" in the box and an "Auto-Empty Station". The station collects dust. Its 3 L bag, SwitchBot says, is "emptied once every 70 days". The robot was $699.99 at SwitchBot's US store, checked 2026-10-23.

On a dust-only dock, pad care remains a manual job: remove the pad, rinse it and let it dry after mopping. A kitchen and entry hall may be manageable, but a larger area means more grime on the same pad. If you would leave it damp on the robot, keep mopping off until you can change it.

Spinning pads

ECOVACS describes the DEEBOT T50 Pro Omni's system as a "Rotating Dual-Mop" with an extendable mop. ECOVACS also says the mop plate stays 1 mm from edges (TruEdge 2.0). The dock does most of the pad care here. ECOVACS lists "70°C hot water mop-washing", "hot air drying at 45°C", "automatic detergent refill" and auto-empty. It also lists "Auto Refill and Drain"; we have not confirmed whether that means a hookup to your water lines or what it takes to install. The T50 Pro Omni was $399.99 at Amazon (checked 2026-10-13) and at Best Buy and Walmart (both checked 2026-10-07).

The T50 Pro Omni is the lowest-priced washing-dock example here, with the same recorded price at all three stores. Its washed and dried spinning pads suit a mix of rugs and hard floors when you want less pad handling. Allow for detergent purchases with an automatic-refill dock.

Roller mops

Roller systems put the rinse inside the job. Confirm the return-to-dock schedule for the model you choose rather than assuming self-washing eliminates those stops.

• ECOVACS DEEBOT X11 Pro Omni: ECOVACS calls it an "OZMO ROLLER 2.0 roller mop with instant self-washing mopping technology". The dock washes at 75 °C and offers hot air drying settings of 2, 3 (default) or 4 hours. ECOVACS lists "Auto Refill and Drain: No" and notes that the dual-liquid cleaning solutions are "sold separately". The robot was $749 at Walmart (checked 2026-10-07) and $999.99 at Amazon (checked 2026-10-13). $999.99 − $749 = $250.99.
• SwitchBot S20: SwitchBot describes a "RinseSync roller mop" with a "4-step rinse cycle" and "1kg downward pressure"; the dock refills, empties waste and dries with 50°C air. Its support distinguishes a tank-base configuration from use with a separate Water Station (checked 2026-11-01). Match the package to the configuration you want. The robot was $799.99 at SwitchBot's store, price checked 2026-10-07.
• SwitchBot S10: SwitchBot describes a "RevoRoll Roller Mop with RinseSync self-mop-washing". It uses two stations. The Water Station connects to household plumbing to refill and drain, and a separate station self-empties and dries with hot air. The robot was $1,199.99 at SwitchBot's store, checked 2026-10-07. Compared with the S20 at the same store, $1,199.99 − $799.99 = $400.
• MOVA Z70 Ultra Roller Complete: MOVA describes "high-pressure roller mopping with running water", with "5,000Pa (18N) constant pressure" and a water circulation system. The robot was $1,299 at MOVA's US store, checked 2026-10-08.

A roller still leaves water-tank chores unless the station refills and drains automatically. On the X11, you fill and empty the tanks; larger hard-floor areas mean doing that more often. A plumbed S10 station can remove that task if household plumbing is near the dock. The S10 at $1,199.99 at SwitchBot's store (checked 2026-10-07) includes its Water Station; the S20 at $799.99 at the same store and date uses a Water Supply & Drainage Kit or the Auto-Fill & Drain bundle for the same job. Confirm which plumbing components are included in the S20 package before ordering. At Walmart on 2026-10-07, the T50 Pro Omni to X11 step cost $749 − $399.99 = $349.01.

What happens on carpet

ECOVACS rates the T50 Pro Omni's mop lift at 9 mm and the X11 Pro Omni's at 10 mm. Lifting raises the mop above low-pile rugs, but on deeper pile it can still touch the fibers.

For the K20+ Pro's pad kit, confirm with SwitchBot whether the mop lifts and which carpet-exclusion controls are available. Follow its instructions for removing the bracket before vacuuming carpeted rooms. On thick rugs, treat lift height as a help rather than a clearance guarantee.

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