Roborock Saros 20
Best for: Homes with carpets and clutter · Premium
Roborock's flagship, with a very low body, a lifting chassis and a dock that handles nearly every chore.
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Pros
- Only 79.8 mm tall, so it fits under low furniture
- Chassis lifts for carpet and crosses tall thresholds
- Dock washes with 100°C water, dries and refills
- Voice assistant that works without Wi-Fi
Cons
- Roborock does not state battery capacity or runtime
- Large, heavy dock
- Premium tier
The Saros 20 is the top model on Roborock's UK range, and its page leads with a 36,000 Pa suction rating. That figure comes from Roborock's own testing, so read it as a ceiling rather than something you will always get. The practical details are in the body: a chassis that lifts for carpet of up to 3 cm pile, a double-layer threshold crossing of up to 8.8 cm combined, and a robot only 79.8 mm tall for getting under low furniture.
Navigation uses the StarSight system with 3D sensing, plus a side-facing beam that Roborock says can see objects as small as 2 cm. A camera recognises more than 300 types of obstacle, including cables and pets. Mopping is done by two spinning pads at 200 RPM with a side mop arm for edges, and the pressure rises when the robot spots a stubborn stain.
The RockDock does most of the housework. It empties the bin for up to 65 days, washes the pads in 100°C water, dries them with 55°C air, refills the robot and dispenses detergent. A built-in "Hello Rocky" assistant works without Wi-Fi, and Alexa, Siri, Google Home and Matter are supported.
Roborock's page gives no battery capacity or runtime claim, so we cannot give one. The dock is also large, at 381 x 475 x 488 mm.
Key specifications
| Suction (manufacturer figure) | 36,000 Pa |
|---|---|
| Navigation | StarSight Autonomous System 2.0 (3D sensing) |
| Obstacle avoidance | VertiBeam side avoidance (objects from 2 cm); recognises 300+ obstacle types |
| Mopping system | Two spinning mops, 200 RPM, 8 N pressure (13 N on stains), FlexiArm side mop |
| Mop lift on carpet | Mops lift or detach automatically; chassis lifts for carpet up to 3 cm pile |
| Self-emptying dock | Yes, up to 65 days |
| Mop washing and drying | 100°C hot-water wash, 55°C warm-air drying, detergent dispenser |
| Automatic water refill | Yes (warm water) |
| Battery and claimed runtime | Not stated |
| Control app | Roborock app (RockMind AI, SmartPlan 3.0) |
| Voice assistants | Built-in "Hello Rocky" (works without Wi-Fi), Alexa, Siri, Google Home, Matter |
| Robot height | 79.8 mm |
| Threshold climbing | Double-layer thresholds up to 8.8 cm combined (4.5 + 4.3 cm) |
| Robot size | 353 x 350 x 79.8 mm |
| Dock size | 381 x 475 x 488 mm |
| Robot weight | 5.05 kg |
| Dock weight | 10.54 kg |
| Dust bag drying | Fresh-air dust bag drying in the dock |
Spec check note: Roborock's page does not list a model number, battery capacity or runtime, so those are left out. The page also shows a stray "0 Pa" figure, which we ignored in favour of the 36,000 Pa figure stated in the text.
Specifications checked against: Roborock UK Saros 20 page