Saros 20 Flow
3 independent reviewsRead the findings →The roller-mop version of Roborock's flagship, with a pop-down laser for low furniture. It's excellent at vacuuming and handling hair, especially on hard floors. It leaves a strip along walls and skirting boards, though.
Updated
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Where it sits in Roborock’s range
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What reviewers found
Three German home tests, all of the European Flow Complete: SmartHomeAssistent, home&smart and Testsieger TV. All three rate the vacuuming and hair handling very highly. They disagree on how good the mopping is and on obstacle avoidance. They do agree it leaves corners and wall edges less clean than the rest of the floor.
SmartHomeAssistent, hands-on, Sept 2026 (tested on the Saros 20 Flow Complete (EU bundle, same robot)) · home&smart, hands-on, Sept 2026 (tested on the Saros 20 Flow Complete (EU bundle, same robot)) · Testsieger TV, hands-on, Sept 2026 (tested on the Saros 20 Flow Complete (EU bundle, same robot))
Hard floors
Mixed resultsOpen floors come up very clean, edges less so. SmartHomeAssistent measured near-perfect pickup on hard floors but scored edges poorly, and home&smart saw dust left in corners despite the reversing side brush.
Carpet and rugs
Reviewers rate it highlyTestsieger TV measured almost total pickup on carpet, and SmartHomeAssistent found strong results on ordinary carpet and a high haul even from deep pile, though deep-pile results were noticeably weaker.
Pet hair
Reviewers rate it highlySmartHomeAssistent saw hair fully cleared from hard floors and ordinary carpet, Testsieger TV found no hair wrapped round the brushes, and home&smart was pleased with how it handled long pet hair.
Mopping
Mixed resultsTestsieger TV cleared coffee in one pass and ketchup in two, and home&smart saw dried and greasy marks lifted. SmartHomeAssistent rated the mopping only satisfactory, and all three found a strip left along walls and in corners.
Navigation and obstacles
Mixed resultsIt depends on the obstacle. Testsieger TV saw it get round almost everything on its course, but SmartHomeAssistent watched it run into a Lego brick, a cat toy and fake pet mess. Clear small, flat items first.
Dock and upkeep
Reviewers rate it highlySmartHomeAssistent gave the dock full marks and found its tray stayed clean and dry, and Testsieger TV rated it low-maintenance compared with rivals, though the roller takes about four hours to dry.
App and software
Reviewers rate it highlyhome&smart found the app intuitive enough for beginners, Testsieger TV praised its easy controls and depth, and SmartHomeAssistent called it detailed but clearly laid out.
Noise
Not enough evidenceNone of the reviews we use measured or judged its noise yet.
Reliability and support
Not enough evidenceNone of the reviews we use ran it long-term or judged Roborock's support yet.
Value
Reviewers rate it highlyhome&smart found the high price justified if lower upkeep matters to you, and SmartHomeAssistent rated its value for money very good.
Verdicts come from independent, hands-on, finished reviews. An area needs at least two of them before we say more than “Not enough evidence”. We don't score robots ourselves. How this works
Strong mopping, weak edges
Testsieger TV saw coffee gone in one pass and ketchup in two, and called it the best roller-mop robot on the market. home&smart found it reliably lifted dried, greasy and muddy marks. SmartHomeAssistent was cooler, grading the mopping only satisfactory, though it cleared coffee stains fully. The shared complaint is edges: Testsieger TV measured a gap of about 10mm at walls, home&smart called corner cleaning its one real weakness, and SmartHomeAssistent scored edges poorly. Expect a clean open floor and the odd wipe along skirting boards.
Excellent vacuuming and hair handling
SmartHomeAssistent measured near-perfect pickup on hard floors and strong results on ordinary carpet, with hair fully cleared from both. Deep-pile carpet was noticeably weaker, for dirt and for hair. Testsieger TV measured almost total pickup on carpet and found no hair wrapped round the brushes. home&smart was impressed with long pet hair too. If you have a long-haired pet, you should spend very little time cutting hair off brushes.
Avoidance depends on the obstacle
Testsieger TV scored it 9 out of 10 on its obstacle course. SmartHomeAssistent was far less impressed: out of 16 objects, it ran into a drawing pad, a cat toy, a Lego brick and a small piece of fake pet mess. Small, flat objects, which SmartHomeAssistent deliberately includes, seem to explain the difference. If you have children's toys or an accident-prone pet, clear the floor first.
Climbing works, within limits
SmartHomeAssistent watched it clear a 5.5cm threshold using its extending wheel arms, which ties the best result on its course, but found the chassis-lift setting made no difference in testing. Testsieger TV tried a 4cm step, and it got over. None of the reviews we use tested the advertised 8.8cm, which applies to a two-step threshold. Most doorway thresholds and rug edges shouldn't be a problem.
A dock that stays clean
SmartHomeAssistent gave the dock full marks and noted its dirty-water tray stayed clean and dry, because the roller is washed inside the robot. Testsieger TV rated it low-maintenance compared with rivals, though the roller takes about four hours to dry. You still refill clean water, empty dirty water and change dust bags, but the European box includes spares to get you started.
All the tests are German reviews of the European Flow Complete. The US Saros 20 Flow is the same robot without the extra consumables.
Our take
Should you buy the Saros 20 Flow?
Best for: Homes with hard floors where long hair tangles the brush. Skip it if: Cleaning right into corners is your top priority.
buy it for mostly hard floors, a long-haired pet and doorway thresholds, if you'll wipe the skirting boards yourself. For cleaner corners the rotating-mop Saros 20 reaches further.
The Saros 20 Flow is the roller-mop version of Roborock's 2026 flagship. Where the standard Saros 20 spins two round pads, this one uses a long roller that is rinsed with clean water as it goes, a bit like a floor washer. It keeps a laser that sinks into the body for low furniture and the hardware for climbing raised doorway thresholds. In Europe it is sold as the Flow Complete, the same robot with spare bags, filters, brushes and cleaning solution in the box.
All three German testers rate the vacuuming and hair handling very highly. SmartHomeAssistent measured near-perfect pickup on hard floors with hair fully cleared, and Testsieger TV found no hair wrapped round the brushes. They split on the mop. Testsieger TV cleared coffee in one pass and called it the best roller-mop robot on the market, while SmartHomeAssistent rated the mopping only satisfactory. All three found it leaves a strip along walls and in corners, which home&smart called its one real weakness. Obstacles depend on their size. Testsieger TV saw it get round almost everything, but SmartHomeAssistent watched it run into a drawing pad, a cat toy, a Lego brick and fake pet mess. Testsieger TV also found the roller takes about four hours to dry.
Before you buy
The questions people ask about this one
Does it clean right into corners?
Not fully. Testsieger TV measured a gap of about 10mm along walls and noted the side brush doesn't extend. home&smart and SmartHomeAssistent also marked it down for corners and edges. The open floor gets very clean; skirting boards may need an occasional wipe.
Can it keep the mop off the carpet?
Yes. SmartHomeAssistent found the roller lifts and closes itself off when the robot goes onto carpet, so rugs stay dry. It also scored strongly on ordinary carpet, though deep-pile was weaker for dirt and hair.
Does it fit under low furniture?
It's 8.98cm tall, according to the specifications, because the laser turret sinks into the body. That's about a centimetre taller than the standard Saros 20. Measure the gap under your sofa and bed; many robots need 10cm or more.
Will it avoid cables and pet mess?
Not reliably. SmartHomeAssistent saw it hit a Lego brick, a cat toy and fake pet mess, even though Testsieger TV scored it 9 out of 10 on a different course. Pick small things up before a run, especially if you have pets.
How often do I have to empty or refill anything?
The dock empties the robot for up to 65 days, adds detergent and washes the roller in hot water, per the specifications. You still empty the dirty-water tank and top up clean water. Testsieger TV found the roller takes about four hours to dry after a run.
Alternatives
Other robot vacuums to compare.
Saros 20
Why consider it: Spinning mops that swing out to reach edges, a lower body and two solid English-language tests.
The compromise: RTINGS found its obstacle avoidance inconsistent, especially on carpet, and it has no laser turret.
Aqua10 Ultra Roller
Why consider it: Several testers call its roller mopping the best they've seen, and it keeps rugs dry.
The compromise: It's slow and heavy on battery, and owners have reported leaking docks.
Qrevo Curv 2 Flow
Why consider it: Roborock's first self-rinsing roller mop, quiet and tangle-free on hard floors.
The compromise: Testers found it struggles with dried stains, and its tall body won't fit under low sofas.
Specs
Full specifications
Each specification names its source. Manufacturer claims are not independent test results; unconfirmed figures are labelled.
Owner reviews
Do you own the Saros 20 Flow?
Tell people how it’s held up: cleaning, maintenance, faults and support. Owner accounts are shown separately from independent reviews.
Sources
Where this page’s findings come from
Editorial reviews
- SmartHomeAssistent: Roborock Saros 20 Flow Complete test ↗1.5 (Sehr gut)Hands-on · Tested on the Saros 20 Flow Complete (EU bundle, same robot)
- home&smart: Roborock Saros 20 Flow Complete im Test ↗95/100 (Sehr gut)Hands-on · Tested on the Saros 20 Flow Complete (EU bundle, same robot)
- Testsieger TV: Roborock Saros 20 Flow Complete Test ↗Hands-on · Tested on the Saros 20 Flow Complete (EU bundle, same robot)
Sources
Videos
- Search YouTube for Roborock Saros 20 Flow ↗Search results may include company demonstrations or similar models. Check the source and model name; a demonstration is not an independent performance test.