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Dreame has emerged as one of the most serious challengers to Roborock's dominance, and the L20 Ultra is their flagship product. At a higher price point than the Roborock S8, the L20 Ultra promises not just better cleaning but a true hands-off experience — a fully automated cleaning station that empties the dustbin, refills the water tank, washes the mop pads, and dries them automatically.
The question isn't just "does it clean well?" (it does) — it's whether the premium price and the bulky station are worth it compared to the Roborock S8 or the Ecovacs Deebot T20 Omni.
The All-in-One Cleaning Station
The L20 Ultra's cleaning station is impressive in scope. It's large — about the size of a small bedside table — and performs five automated functions:
- Auto dust emptying: Sucks the robot's dustbin contents into a 3-litre bag. The bag lasts about 60–90 days with daily use.
- Clean water tank refill: Automatically refills the robot's onboard water tank from a 4-litre reservoir.
- Dirty water collection: Collects used mop water in a separate dirty water tank to avoid re-spreading grime.
- Mop pad washing: Washes the mop pads with clean water and rotates them at high speed to remove soil.
- Mop pad drying: Hot air drying prevents mildew and odours on the mop pads between cleaning sessions.
In practice, this works as advertised. After each cleaning session, the robot returns to the station and the whole process runs automatically — taking about 20 minutes. If you run cleaning sessions while you're out, you come home to clean floors and a freshly maintained robot. It's a genuinely impressive level of automation.
Vacuuming Performance
The L20 Ultra uses a single main brush (rubber) with 7000Pa suction — slightly more powerful than the Roborock S8's 6000Pa. In practice, the difference is minimal; both pick up fine dust and debris effectively. The L20 Ultra edges ahead slightly on deep carpet cleaning, but the gap isn't dramatic.
Obstacle avoidance is where the L20 Ultra shines. Dreame's AI obstacle avoidance (based on RGB camera + structured light) identified and avoided socks, cables, small toys, and even identified dog waste in testing. The avoidance is genuinely best-in-class and significantly better than the S8's basic system.
Mopping & Self-Cleaning Mop
The L20 Ultra uses dual rotating mop pads rather than a vibrating single pad. The pads spin at high RPM and apply downward pressure, which is effective for light stains and general daily mopping. It's a different approach from Roborock's sonic mopping — more suited to large flat areas, slightly less effective on stuck-on marks compared to sonic scrubbing.
The self-cleaning mop feature is the real differentiator. After every cleaning session (or mid-session, if programmed), the robot returns to the station to wash its mop pads. This means you're always mopping with a clean pad rather than spreading dirty water around.
Navigation
LiDAR navigation creates precise floor maps. The Dreame app allows room segmentation, custom cleaning sequences, and no-go zones. Mapping accuracy is comparable to Roborock. Multi-floor map support handles homes with multiple storeys, with the robot automatically recognising which floor it's on.
App & Smart Home Integrations
The Dreame app is well-designed and responsive. It's slightly less mature than Roborock's app in terms of scheduling options, but covers all the essentials. Alexa and Google Home are supported.
Home Assistant support is improving. The official Dreame integration in HACS provides room-level control and full status monitoring, though it lags slightly behind Roborock's HA integration in completeness.
Dreame L20 Ultra vs. Roborock S8: Which to Buy?
Both are excellent robots, but they suit different buyers:
- Choose the L20 Ultra if: You want maximum hands-off automation, have pets that create obstacles, and can justify the higher price and larger station footprint.
- Choose the Roborock S8 if: You want the best value, prefer sonic mopping, and are happy to manually empty and refill occasionally.
Our Verdict: 9/10
The Dreame L20 Ultra is an exceptional robot vacuum mop with the best obstacle avoidance and the most complete self-maintenance system of any robot vacuum we've tested. It's more expensive and bulkier than the Roborock S8, but for large homes where truly hands-free cleaning is the goal, it's hard to beat.
Dreame L20 Ultra Robot Vacuum and Mop
7000Pa suction, dual rotating mops, AI obstacle avoidance, and a fully automated self-cleaning station. The most autonomous robot vacuum available.
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