Dreame L40s Pro Ultra: review and verdict
The Dreame L40s Pro Ultra is the entry price of the L series, at 549 €. It carries over the essential architecture of the pricier models — detangling brush, automated station, EasyLeap climbing — with the most modest suction in the range.
The verdict in short
The L40s Pro Ultra scores 8.3/10. At 549 €, it is the cheapest in the L series, with suction of 19,000 Pa — the weakest in the range on paper, but climbing of 4 cm that beats the pricier L50 Ultra AE (2 cm). A good compromise for a first robot or a modestly sized home.
✓ Pros
- The lowest entry price in the L series: 549 €
- HyperStream dual detangling brush, identical to the pricier models
- 4 cm of climbing thanks to the EasyLeap system
- AI-assisted re-cleaning of the dirtiest areas
✕ Cons
- 19,000 Pa — the weakest suction in the L series, according to the manufacturer
- No automatic refilling of cleaning solution at the station
- Pathfinder navigation, less advanced than VersaLift or the laser sensor of the other L models
Who is it for?
A first Dreame robot, or a modestly sized flat with no particular demands on suction. The price-to-equipment ratio is the best in the L series: detangling brush and automated station, for 200 € less than the L50s Pro Ultra.
Avoid it if…
You have long-haired pets and thick carpets: according to the manufacturer's specifications, its 19,000 Pa is the weakest in the L series. The L50s Pro Ultra, for 200 € more, suctions one and a half times harder.
Specifications
| Maximum suction | 19 000 Pa |
|---|---|
| Main brush | Brosse duo démêlante HyperStream |
| Navigation | Navigation intelligente Pathfinder |
| Obstacle climbing | 4 cm — système EasyLeap |
| Mopping system | Serpillières rotatives · renettoyage assisté par IA |
| Mop washing | Eau chaude 100 °C (ThermoHub) |
| Dock | Vidage, lavage, séchage automatiques |
| Battery | 5 200 mAh |
| Tanks (clean / dirty) | 4,5 L / 4,0 L |
| Dustbin | 200 mL |
| Robot dimensions | 350 × 350 × 103,5 mm |
Our scores by criterion
Suction is its weakest criterion, unsurprisingly at this price level. Value for money, conversely, is excellent: it carries over the detangling brush and the EasyLeap climbing of the pricier models in the range, for 549 €.
Against its alternatives
| Dreame L40s Pro Ultra | Dreame L50 Ultra AE | Dreame L50s Pro Ultra | |
|---|---|---|---|
| List price | 549 € | 599 € | 749 € |
| Year | 2025 | 2025 | 2025 |
| Maximum suction | 19 000 Pa | 28 000 Pa | 30 000 Pa |
| Main brush | Brosse duo démêlante HyperStream | Brosse TriCut 3.0 | Brosse duo démêlante HyperStream |
| Navigation | Navigation intelligente Pathfinder | Capteur de distance laser | Capteur de distance laser |
| Obstacle climbing | 4 cm — système EasyLeap | 2 cm | 4 cm (marche à deux niveaux), 2,2 cm (marche simple) — EasyLeap |
| Mopping system | Serpillières rotatives · renettoyage assisté par IA | Serpillières rotatives, bras flexible double | Serpillières rotatives extensibles |
| Mop washing | Eau chaude 100 °C (ThermoHub) | Eau chaude 100 °C (ThermoHub) | Eau chaude 100 °C (ThermoHub) |
| Dock | Vidage, lavage, séchage automatiques | Vidage, lavage, séchage · AceClean DryBoard | Vidage, lavage, séchage, remplissage automatiques · AceClean DryBoard |
| Battery | 5 200 mAh | 5 200 mAh | 5 200 mAh |
| Tanks (clean / dirty) | 4,5 L / 4,0 L | 4,5 L / 4,0 L | 4,5 L / 4,0 L |
| Dustbin | 200 mL | 200 mL | 250 mL |
| Robot dimensions | 350 × 350 × 103,5 mm | 350 × 350 × 97 mm | 350 × 350 × 103,8 mm |
According to the manufacturer's specifications, the L40s Pro Ultra suctions less hard than the L50 Ultra AE (19,000 Pa against 28,000 Pa) for 50 € less, but it climbs twice as well (4 cm against 2 cm) thanks to the EasyLeap system. What that means in practice: the choice between the two depends on the nature of your floor more than on the area to cover.
Against the L50s Pro Ultra, the gap widens on suction (19,000 Pa against 30,000 Pa) for a 200 € difference. The L40s Pro Ultra remains defensible for a home not heavily loaded with hair or dust; beyond that, the premium is justified.
Maintenance and consumables
According to the manufacturer's specifications, the station automatically handles dust bin emptying, mop washing and mop drying. The absence of automatic solution refilling means the clean water tank (4.5 L) has to be filled by hand at regular intervals. Also on the user: rinsing the filter (monthly) and replacing the brush and the mops (every 6 to 12 months depending on visible wear).
Our method
This page is an analysis built from the manufacturer's specifications and from the model's position within the lineup, not from a physical test — we have not had this machine in our hands. Our method is explained in full here: How we assess Dreame robots.
Frequently asked questions
Is the L40s Pro Ultra a good first Dreame robot?
Yes. At 549 €, it is the cheapest entry point into the L series, with the same HyperStream dual detangling brush as the pricier models in the range, and 4 cm of climbing thanks to the EasyLeap system.
What is the L40s Pro Ultra’s main limitation?
Its suction, the weakest in the L series according to the manufacturer: 19,000 Pa, against 30,000 Pa for the L50s Pro Ultra at 749 €. On thick carpets or with long-haired pets, the gap can make itself felt.
Does the L40s Pro Ultra climb better than the L50 Ultra AE?
Yes, clearly, according to the manufacturer’s specifications: 4 cm against 2 cm, thanks to the EasyLeap system. That is a strong argument for the L40s Pro Ultra if your home has pronounced thresholds, even though its suction is weaker.
Should you pay more for the L50s Pro Ultra rather than the L40s Pro Ultra?
If suction is your priority, yes: 200 € more buys 30,000 Pa against 19,000 Pa, that is 1.5 times the power on paper. If your home is small or not heavily loaded with pet hair, the L40s Pro Ultra covers the essentials for less.
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