Roborock S8 Max Ultra
For buyers who can plumb in the dock and want a hands-off mopping robot that never needs its water tanks touched.
Amazon $599.99$599.99
The Roborock S8 Max Ultra rates 4.1 among self-cleaning dock robot vacuums; the Ecovacs Deebot N20 Plus rates 3.4 among vacuum and mop ones. The Ecovacs Deebot N20 Plus costs $200 less ($399.99 vs $599.99).
Ecovacs Deebot N20 Plus
#10 in Vacuum and mopFull review
A basic self-emptying LiDAR robot for vacuuming; since it is hard to find new, the T50 Max Pro Omni is the better buy.
Amazon Ecovacs $399.99$399.99
Prices were last checked October 26, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different type classes (self-cleaning dock and vacuum and mop), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | Roborock S8 Max Ultra | Ecovacs Deebot N20 Plus |
|---|---|---|
| Overall rating | 4.1/5 | 3.4/5 |
| Cleaning 30% | 63 not yet tested; estimated from 19 tested Roborock robots and the median of the 70 tested robots | 60 measured 79% of sand from carpet, 96% of pet hair, no hair tangled |
| Value 25% | 67 $600 | 57 $400 |
| Dock 20% | 100 Self-empties the bin, washes the mop, hot-water mop wash, hot-air mop drying, doses detergent, optional water hookup | 62 Self-empties the bin |
| Navigation 15% | 85 LiDAR + 3D light | 65 LiDAR |
| Mopping 10% | 62 Vibrating pad, lifts 20 mm, extends to edges | 10 Static pad |
Independent tests
Roborock S8 Max Ultra
No independent test published yet.
Ecovacs Deebot N20 Plus
| Tested by | Carpet deep clean | Pet hair | Hair tangle (0 = none) | Area per charge | Conditions |
|---|---|---|---|---|---|
| Vacuum Wars | 79% | 96% | 0 | 943 sq ft | Embedded sand in medium-pile carpet; flattened 2.5 in pet hair on carpet, two runs; 7 in hair tangle on hard floor (0 = none wrapped). |
Specifications
| Roborock S8 Max Ultra | Ecovacs Deebot N20 Plus | |
|---|---|---|
| Vacuum | ||
| Claimed suction | 8,000 Pa | 8,000 Pa |
| Main brush | DuoRoller Riser dual rubber brushes | single floating bristle brush (ZeroTangle) |
| Dustbin | - | 400 mL |
| Extending side brush | Yes | No |
| Mopping | ||
| Mop | Vibrating pad, lifts 20 mm, extends to edges | Static pad |
| Mop lift | 20 mm | - |
| Leaves mop at dock | No | No |
| Extending mop | Yes | No |
| Water tank | - | 220 mL |
| Dock | ||
| Dock | Washes mop + empties | Self-empty |
| Self-empties | Yes | Yes |
| Washes mop | Yes | No |
| Hot-water wash | Yes | - |
| Hot-air drying | Yes | - |
| Detergent dosing | Yes | - |
| Water hookup option | Yes | - |
| Navigation & app | ||
| Navigation | LiDAR + 3D light | LiDAR |
| Obstacle avoidance | 3D structured light (Reactive 3D) | Infrared and bump sensors only |
| Climbs thresholds | - | 20 mm |
| Voice assistants | Alexa, Google Assistant, Siri Shortcuts | Alexa, Google Assistant |
| Build | ||
| Height | 3.8 in (97 mm) | 3.8 in (96 mm) |
| Retracting LiDAR | No | No |
| Battery | 5,200 mAh | 5,200 mAh |
| Run time | - | Up to 5 h |
| Warranty | - | 1 year |
| Released | 2024-04 | 2024-09 |