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Roborock S8 Max Ultra with Refill & Drainage System
No test site has tested it yet, so it is not in our ranking.
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- Long hair anti-tangle brush
Before you buy, compare it with 2 recommended alternatives
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 Roborock S8 Max Ultra with Refill & Drainage System Best on 3 facts | Higher score, 8% cheaper Roborock Qrevo 2 Pro Best on 5 facts | Higher score, 8% pricier MOVA S70 Roller Best on 4 facts | |
|---|---|---|---|
| The facts that decide most | |||
| The lowest price today at a store that ships to you, shipping included. A price with an asterisk comes from a store abroad, and its shipping cost is our own estimate. Lowest price | $599Roborock (brand store) | $549Roborock (brand store) best | $649MOVA (brand store) |
| Our own score out of 10: 60% test-site results, 25% store ratings and 15% the maker’s facts. Price does not count. Score | not in our ranking | best | |
| 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. In this comparisonWhen it matters
When it matters less
Source
| 8,000 Pa | 25,000 Pa | 28,000 Pa best |
| How long the robot cleans on one charge, at its quietest setting. After that it recharges and carries on where it stopped. In this comparisonWhen it matters
When it matters less
Source
| 180 min | 253 min best | 220 min |
| 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
When it matters less
Source
| 0.8 in (20 mm) | 0.8 in (20 mm) | 0.9 in (22 mm) best |
| How tall the robot is. It decides whether it fits under your sofa, bed or cabinet. In this comparisonWhen it matters
When it matters less
Source
| 3.8 in (9.7 cm) | 3.8 in (9.7 cm) | 3.5 in (9 cm) best |
| How far the robot lifts the mop when it drives onto a carpet. From about 0.4 in (10 mm) a medium pile stays dry. In this comparisonWhen it matters
When it matters less
Source
| 0.8 in (20 mm) best | 0.6 in (15 mm) | 0.5 in (12 mm) |
| 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
When it matters less
Source
| up to 49 days | up to 170 days best | up to 100 days |
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.
Prices per store
On October 27, 2026 the lowest price for the Roborock S8 Max Ultra with Refill & Drainage System is $599 at Roborock (brand store), shipping to the United States included.
All prices include shipping to the United States. Sales tax is added at checkout. We may earn a commission when you buy through these links. It never changes our ranking.
Check price on Amazon
Roborock brand store $599$1,699 Discount as claimed by the store. We have not followed this store for the 30 days before the sale began, so we cannot verify the old price yet.How we work this out
Shippingabout 3–7 days
Returns30-day returns
Color: white No reviews at this store yet
To Roborock We show no Amazon prices for now. Check the price on Amazon itself.
Price history
Lowest price per day Average $703
Follow price changes via RSS. A feed reader (RSS app) shows a new entry at every change, with no e-mail address needed.
Lowest since Sep 27$549
Highest since Sep 27$849
Price drops since Sep 273last: October 26, 2026
Roborock S8 Max Ultra with Refill & Drainage System specifications
The numbers that matter first, then every fact by group. As published by the maker or the store we read it from.
Roborock · on the market since April 2024
Robot height3.8 in
Climbs thresholds up to0.8 in
Mop lift on carpet0.8 in
Runtime per charge180 min
Suction power8,000 Pa
Consumables: a dust bag in the station, which lasts up to 49 days.
Dimensionsrobot and dock
From the published dimensions. The robot passes under furniture with 3.8 in of clearance or more. The dock needs a spot 16.5 in wide and 16.1 in deep.
Suction and brushes 5 facts
- Suction power
Among the models we track
8,000 Pa on this model
Lowest
450 Pa Highest
42,000 Pa Middle
6,000 PaHigher than 574 of the 989 models we track.
When it matters
- Deep-pile carpet and rugs, where dust sinks in.
- Pet hair, sand and crumbs trodden into fibers.
When it matters less
- On hard floors the gain from a higher figure is small: the dust lies on top.
Source: us.roborock.com · checked on Sep 26
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.
- 8,000 Pa
- Anti-tangle brush
516 of the 539 models we track have this.
When it matters
- Long hair and pet hair, which wrap around a bristle brush.
- Homes where you would rather not cut hair off the brush.
When it matters less
- Short hair and few pets hardly tangle anyway.
Source: product.roborock.com · checked on Oct 27
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.
- yes
- Extending side brush
When it matters
- Corners and edges along baseboards, where a round robot leaves a strip of dust.
- Rooms with many walls and furniture edges.
When it matters less
- In open rooms with few corners it adds little.
Source: us.roborock.com · checked on Sep 26
The side brush swings out in a corner or along a baseboard, so the dust there is swept in too.
- yes
- Carpet detection
When it matters
- Rugs and carpets, where the robot should raise its suction.
- Mopping in a home with rugs, which have to stay dry.
When it matters less
- Without carpets or rugs it has nothing to detect.
Source: us.roborock.com · checked on Oct 2
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.
- detects carpet and boosts suction
- Dirt detection
When it matters
- Entrances and kitchens, where dirt gathers in one place.
- Pets that leave hair in a favorite spot.
When it matters less
- If dirt is spread evenly, a normal pass cleans it just as well.
Source: us.roborock.com · checked on Oct 2
A sensor notices where more dirt lies, at the doormat for example, and the robot cleans that patch longer or a second time.
- yes
Mopping 5 facts
- Mop type
When it matters
- Homes with a lot of hard floor that you want mopped, not just wiped.
- Dried-on dirt in a kitchen, which spinning pads or a roller scrub off better than a dragged cloth.
When it matters less
- If you only vacuum, the mop’s build decides nothing.
Source: us.roborock.com · checked on Sep 26
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.
- flat or vibrating pad
- Mop lift on carpet
Among the models we track
0.8 in (20 mm) on this model
Lowest
0.2 in (5 mm) Highest
1.2 in (30 mm) Middle
0.4 in (10.5 mm)Higher than 277 of the 292 models we track.
When it matters
- Homes with rugs and hard floors side by side.
- Mopping without the robot leaving the rugs damp.
When it matters less
- Without rugs the mop never has to lift.
Source: us.roborock.com · checked on Sep 26
How far the robot lifts the mop when it drives onto a carpet. From about 0.4 in (10 mm) a medium pile stays dry.
- 0.8 in (20 mm)
- Automatic mop detach
When it matters
- Homes with carpets or rugs that should stay dry.
- High-pile rugs that no mop lift clears.
When it matters less
- Without carpets the mop can stay on.
Source: us.roborock.com · checked on Oct 10
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.
- no (assumed)
- Mop refreshed while mopping
When it matters
- Large hard floors, where a mop that is never rinsed spreads dirt around.
- Kitchens with sticky spills.
When it matters less
- In a small home the mop does not get dirty enough in one run for it to matter.
Source: Manual · checked on Oct 27
The robot returns to the dock during a run to rinse the mop, instead of pushing dirty water around.
- yes
- Water tank in the robot
When it matters
- Large hard floors mopped in one go.
- A robot whose dock does not refill it during a run.
When it matters less
- With a dock that refills the robot during the run, the tank’s size hardly matters.
Source: product.roborock.com · checked on Oct 27
How much clean water the robot carries. It sets how long it mops before a refill, which a dock does by itself.
- 69 ml
Dock 10 facts
- Empties the dust bin
When it matters
- Pets, sand or a large home, which fill the bin every run.
- Dust allergy, since you rarely touch the dust yourself.
When it matters less
- In a small home with little dust, emptying the bin by hand takes a moment.
Source: us.roborock.com · checked on Sep 26
The dock empties the robot’s dust bin, usually after every run. You only empty the dock’s bag or bin.
- yes
- Bagless
When it matters
- Not wanting to buy bags again and again.
- Pets, whose hair fills a bag quickly.
When it matters less
- With a dust allergy a sealed bag keeps the dust in when you throw it away, so bagless is no gain.
Source: us.roborock.com · checked on Sep 26
The dock collects dust in a bin instead of a disposable bag. No bags to buy, but you empty it yourself.
- no
- Dust bag lasts
Among the models we track
up to 49 days on this model
Lowest
up to 30 days Highest
up to 180 days Middle
up to 70 daysLower than 406 of the 501 models we track.
When it matters
- Pets or a lot of carpet, which fill a bag faster than the maker’s figure.
- Counting what bags cost in a year.
When it matters less
- With a bagless dock there is no bag to replace.
Source: us.roborock.com · checked on Sep 26
How long the maker says a dust bag lasts with daily use. With pets or a lot of carpet it is shorter.
- up to 49 days
- Washes the mop
314 of the 397 models we track have this.
When it matters
- Mopping several times a week, when rinsing pads by hand gets tiresome.
- Kitchens and hallways, where a mop picks up a lot of dirt.
When it matters less
- If you rarely mop, washing the pads by hand is little work.
Source: us.roborock.com · checked on Sep 26
The dock washes the mop for you, so you do not rinse it by hand.
- yes
- Wash temperature
Among the models we track
140 °F (60 °C) on this model
Lowest
122 °F (50 °C) Highest
212 °F (100 °C) Middle
167 °F (75 °C)Lower than 157 of the 186 models we track.
When it matters
- Kitchens with grease and sticky spills.
- Pets, where a hot wash keeps the mop from smelling.
When it matters less
- For light dust on a living room floor a cold wash will do.
Source: us.roborock.com · checked on Sep 26
How hot the dock washes the mop. Above 140 °F (60 °C) grease comes off, which is what keeps a mop from smelling.
- 140 °F (60 °C)
- Dries the mop
When it matters
- Mopping often, since a damp mop in the dock starts to smell.
- Humid rooms, where a mop dries slowly.
When it matters less
- If you take the pads off and wash them yourself, you will not miss it.
Source: us.roborock.com · checked on Sep 26
The dock dries the mop afterwards, so it does not sit there wet and start to smell.
- yes
- Hot-air drying
260 of the 312 models we track have this.
When it matters
- Mopping daily, when the mop barely dries before the next run.
- A smell from the dock in a warm or humid home.
When it matters less
- If you mop only now and then, cold air dries the mop in time.
Source: us.roborock.com · checked on Sep 26
Drying is done with warm air instead of cold. It is faster and it helps against smell.
- yes
- Dispenses detergent
When it matters
- Kitchens and greasy floors, where water alone leaves a film.
- Not wanting to add cleaner by hand each time.
When it matters less
- Some floors, such as oiled wood, are best mopped with water only, so there it adds nothing.
Source: us.roborock.com · checked on Sep 26
The dock mixes detergent into the water itself, from its own bottle.
- yes
- Plumbing hookup
63 of the 156 models we track have this.
When it matters
- Mopping every day, without filling and emptying tanks.
- A spot near a tap and a drain, such as a utility room or under a kitchen counter.
When it matters less
- If the dock stands far from any plumbing, it is no use.
Source: us.roborock.com · checked on Sep 27
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.
- yes
- Dock size (w × d × h)
When it matters
- A small hallway or a niche where the dock has to fit.
- Placing the dock under a cabinet or a counter.
When it matters less
- Along an open wall with room to spare it decides little.
Source: us.roborock.com · checked on Oct 3
The width, depth and height of the dock. Measure the spot you have in mind, and leave room for the lid and for the robot driving in.
- 16.5 × 16.1 × 11.8 in (41.9 × 40.9 × 30 cm)
Navigation and obstacles 5 facts
- Navigation
When it matters
- Several rooms, where a map lets you send the robot to one of them.
- Cleaning in the dark, which lidar does and a camera alone does not.
When it matters less
- In one open room even simple navigation covers the floor.
Source: us.roborock.com · checked on Sep 26
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 recognizes more.
- LiDAR turret
- Obstacle avoidance
When it matters
- Cables, socks and toys left on the floor.
- Pets, whose accidents a robot should steer around.
When it matters less
- In a home that is tidied before each run it matters less.
Source: us.roborock.com · checked on Sep 26
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.
- AI camera
- Climbs thresholds up to
Among the models we track
0.8 in (20 mm) on this model
Lowest
0.1 in (3 mm) Highest
2.4 in (60 mm) Middle
0.8 in (20 mm)Higher than 367 of the 958 models we track.
When it matters
- Door sills and raised strips between rooms.
- Thick rugs whose edge the robot has to climb.
When it matters less
- In a flat home with no sills it decides nothing.
Source: product.roborock.com · checked on Oct 8
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.
- 0.8 in (20 mm)
- Climbing system for high thresholds
When it matters
- Door sills higher than most robots can take.
- Thick rugs and raised doorsteps between rooms.
When it matters less
- In a home without sills it decides nothing.
Source: us.roborock.com · checked on Oct 27
An extending leg or wheel that carries the robot over a high threshold. Without one it usually stops at about 0.8 in (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.
- no (assumed)
- Camera on board
When it matters
- Privacy, if you would rather not have a camera driving through your home.
- Small things on the floor, which a camera sees better than lidar alone.
When it matters less
- If the floor is tidied before each run, a camera adds little.
Source: derived, no source of its own · checked on Oct 2
Whether the robot has a camera, and what for: to recognize obstacles, or also to show you a live picture of your home in the app.
- obstacle camera
Robot 4 facts
- Robot height
Among the models we track
3.8 in (9.7 cm) on this model
Lowest
2.2 in (5.6 cm) Highest
8 in (20.4 cm) Middle
3.7 in (9.5 cm)Higher than 596 of the 1067 models we track.
When it matters
- Sofas, beds and cabinets with little room underneath.
- Dust that gathers under furniture you never move.
When it matters less
- With furniture on high legs or flat on the floor it decides nothing.
Source: us.roborock.com · checked on Sep 26
How tall the robot is. It decides whether it fits under your sofa, bed or cabinet.
- 3.8 in (9.7 cm)
- Robot diameter
When it matters
- Dining chairs and tables with legs close together.
- Narrow gaps between furniture and walls.
When it matters less
- In a room with little furniture the robot’s width decides little.
Source: us.roborock.com · checked on Oct 27
How wide the robot is. Narrower gets between chair legs more easily, wider usually means a bigger dust bin.
- 13.9 in (35.3 cm)
- Dust bin in the robot
When it matters
- A robot without a self-emptying dock, which you empty by hand.
- Pets and long hair, which fill a small bin within one run.
When it matters less
- With a self-emptying dock the bin is emptied after every run, so its size hardly matters.
Source: product.roborock.com · checked on Oct 27
How much dust the robot holds before you empty it. It matters less with a self-emptying dock, which empties the bin after every run.
- 270 ml
- Noise
Among the models we track
67 dB on this model
Lowest
20 dB Highest
80 dB Middle
65 dBHigher than 427 of the 584 models we track.
When it matters
- Cleaning while you work, sleep or watch TV at home.
- Open-plan living spaces where sound carries.
When it matters less
- When it runs while nobody is home the figure hardly matters.
Source: product.roborock.com · checked on Oct 27
The noise in decibels, in the setting its source names: makers mostly give the standard setting, stores often the highest. 65 dB is like a vacuum at half power, 55 dB like a conversation.
- 67 dB
Battery 2 facts
- Battery capacity
Source: us.roborock.com · checked on Sep 26
The capacity of the battery. It hints at the runtime, but how much the robot draws counts just as much.
- 5,200 mAh
- Runtime per charge
Among the models we track
180 min on this model
Lowest
45 min Highest
360 min Middle
150 minHigher than 616 of the 1075 models we track.
When it matters
- Large homes or several floors cleaned in one go.
- Carpet, where the robot uses more power.
When it matters less
- In a small home most robots finish well before the battery runs low.
Source: product.roborock.com · checked on Oct 27
How long the robot cleans on one charge, at its quietest setting. After that it recharges and carries on where it stopped.
- 180 min
Smart features and warranty 3 facts
- Voice assistants
When it matters
- Starting the robot by voice while your hands are full.
- A home already run with Alexa, Google or Siri.
When it matters less
- If you start it from the app or a schedule, you will not miss it.
Source: us.roborock.com · checked on Sep 26
Which voice assistants the robot works with, such as Google Assistant or Alexa.
- Alexa, Siri, Google Home
- Warranty
When it matters
- A robot with a dock full of pumps and moving parts, where more can break.
- An expensive robot you plan to keep for years.
When it matters less
- For a cheap robot you would replace rather than repair, the extra years count for less.
Source: us.roborock.com · checked on Oct 27
The warranty the maker gives in the United States.
- 1 year
- Home Assistant
When it matters
- A smart home run from Home Assistant.
- Automations, such as cleaning when everybody has left.
When it matters less
- If you only use the maker’s app, it adds nothing.
Source: home-assistant.io · checked on Oct 2
Whether the robot works with Home Assistant, the home automation software you run yourself. Official means the integration comes with Home Assistant itself, community that volunteers maintain it.
- official integration
Sources: us.roborock.com · product.roborock.com · Manual · home-assistant.io
Frequently asked questions about the Roborock S8 Max Ultra with Refill & Drainage System
What has the Roborock S8 Max Ultra with Refill & Drainage System cost?
Since we began measuring on September 27, 2026, its lowest price was $549 (October 6, 2026, at Roborock (brand store)) and its highest $849 (October 19, 2026). On average it cost $703. Each figure is the lowest price of a day at the stores we follow.
Does the Roborock S8 Max Ultra with Refill & Drainage System empty its own dust bin?
Yes. The station empties the robot’s dust bin after every run. The dust bag in the station lasts up to 49 days, the maker says.
Does the Roborock S8 Max Ultra with Refill & Drainage System wash and dry its own mop?
Yes. The station washes the mop itself, with water at 140 °F (60 °C). It then dries the mop with warm air.
Does the Roborock S8 Max Ultra with Refill & Drainage System work with Alexa, Google Home or Siri?
It works with Alexa, Siri and Google Home. Home Assistant has an official integration for this model.
How high a threshold can the Roborock S8 Max Ultra with Refill & Drainage System climb?
Thresholds up to 0.8 in (20 mm), the maker says. Measure your own thresholds: the ones to a bathroom or balcony are often higher.
Does the Roborock S8 Max Ultra with Refill & Drainage System fit under low furniture?
The robot is 3.8 in (9.7 cm) tall, so it fits under furniture with at least 3.8 in of clearance.
The maker
Roborock
- Reviews on Trustpilot
- Headquarters: China
- Founded in 2014
Roborock, the trading name of Beijing Roborock Technology Co., Ltd., develops and makes robot vacuums and cordless stick vacuums. It was founded in July 2014 and is headquartered in Beijing, China, with research and branch offices in Shanghai and Shenzhen. Xiaomi invested in the company in September 2014, and its first product, the Mi Home Robotic Vacuum Cleaner, went on sale in September 2016.
