E25
$599.98$999.99
- 20,000 PaSuction power: 20,000 Pa
- LiDARNavigation: LiDAR
- 11.18 cmRobot height: 11.18 cm
- Roller mopMopping system: Roller mop
−24% 
Robot Vacuums
Dreame L40 Ultra Gen 2
The highest suction figure in the category at 25,000 Pa, with rotating mop pads that lift 10.5 mm, up to 4 floor maps, a 3.2 L self-empty bag and 231 minutes of runtime. 9.7 cm tall. Home Assistant goes through a HACS integration; Alexa and Google Home are supported.
#1 of 7 robot vacuums
was $749.99
As an Amazon Associate I earn from qualifying purchases
The Dreame L40 Ultra Gen 2 beats the category average in 2 of 4 areas.
- 25,000 Pa suction power
- LiDAR navigation
- 9.7 cm robot height
- Rotating pads mopping system
The L40 Ultra Gen 2 against other robot vacuums
It beats the category average in 2 of 4 areas.
Cleaning 75 · 45
Navigation 50 · 50
Dock 100 · 46
Power & Noise 50 · 50
Where it stands out 2
| Spec | L40 Ultra Gen 2 | Against the rest |
|---|---|---|
| Suction power Peak suction in pascals as stated by the maker. Above ~8,000 Pa the difference on hard floors is small; it matters most on thick carpet. | 25,000 Pa | beats 100% |
| Dust bag capacity A 3 L bag lasts roughly 6–8 weeks in an average home. | 3.2 L | beats 100% |
Closest competitors
-
1
Dreame L40 Ultra Gen 2
69
-
2
Roborock Qrevo 2 Pro
63
Compare
-
3
eufy C28
56
Compare
-
4
iRobot Roomba 115X Combo
42
Compare
-
4
Roborock Qrevo S Pro
42
Compare
-
6
eufy E25
35
Compare
-
7
Roborock Q7 M5+
19
Compare
Score 69 vs 47 category average · 5 of 6 scored specs known. How we score
Works with — and how well
“Works with Alexa” can mean full local control or a cloud skill that only switches it on. Here’s which one.
Platforms
- Matter ? Not confirmed
- Home Assistant Partial Community integration via HACS — can break after updates.
- Apple Home ? Not confirmed
- Google Home Partial Cloud-to-cloud: start, stop, dock and room cleaning, needs the internet.
- Alexa Partial Skill: voice control of start, stop, dock and room cleaning, needs the internet.
Without the cloud
- Works offline Keeps working with your internet down — schedules, automations and local apps still run. ?
- Cloud account required You must create a manufacturer account to set it up. Some devices stop working if the cloud shuts down. ?
- Subscription for key features Features locked behind a monthly fee, e.g. history, AI detection or remote access. ?
- Firmware updates via HA Update the firmware from Home Assistant without the vendor app (Zigbee2MQTT OTA, Matter OTA). ?
- Home Assistant HACS · cloud polling
How to add it to Home Assistant
- Install HACS if you haven’t yet
- HACS → Integrations → search “Dreame” → Download
- Restart Home Assistant
- Settings → Devices & services → Add integration → Dreame
Every spec, with its source
14 of 27 specs sourced
- Manufacturer spec sheet 13
- HACS integration docs 1
- ? Not published — we don’t guess 13
1. Cleaning
4 of 4 known
+30 vs avg
| Spec | L40 Ultra Gen 2 | Source | vs all robot vacuums |
|---|---|---|---|
| Suction power Peak suction in pascals as stated by the maker. Above ~8,000 Pa the difference on hard floors is small; it matters most on thick carpet. | 25,000 Pa Category best | Manufacturer spec sheet | beats 100% |
| Mopping system Rotating pads and roller mops scrub; static pads only wipe. Look for mop lifting if you have carpets. | Rotating pads | Manufacturer spec sheet | |
| Mop lift height How far the mop lifts on carpet. 10 mm+ keeps most rugs dry; some models detach pads entirely. | 10.5 mm | Manufacturer spec sheet | beats 50% |
| Carpet detection An ultrasonic or optical sensor that boosts suction and avoids mopping on carpet. | Yes | Manufacturer spec sheet |
2. Navigation
4 of 4 known
Even with avg
| Spec | L40 Ultra Gen 2 | Source | vs all robot vacuums |
|---|---|---|---|
| Navigation LiDAR maps fast and works in the dark. Camera (vSLAM) needs light but is cheaper. Gyro cleans in lines without a real map. | LiDAR | Manufacturer spec sheet | |
| Obstacle avoidance AI cameras recognise cables, socks and pet waste. Structured light sees shapes but not what they are. | 3D structured light | Manufacturer spec sheet | |
| Multi-floor maps Number of floor plans it can store. Useful if you carry it between floors. | 4 maps | Manufacturer spec sheet | |
| Robot height Lower robots fit under more sofas and beds. Measure your lowest furniture gap. | 9.7 cm | Manufacturer spec sheet | beats 50% |
3. Dock
2 of 4 known
+54 vs avg
| Spec | L40 Ultra Gen 2 | Source | vs all robot vacuums |
|---|---|---|---|
| Self-emptying The dock sucks the dust bin empty into a bag. Saves emptying the robot after every run. | Yes | Manufacturer spec sheet | |
| Mop washing Hot-water washing removes grease better and reduces smell. | ? Not published | ||
| Mop drying Warm-air drying temperature. Without it, damp pads can smell within a day. | ? Not published | ||
| Dust bag capacity A 3 L bag lasts roughly 6–8 weeks in an average home. | 3.2 L Category best | Manufacturer spec sheet | beats 100% |
4. Power & Noise
1 of 2 known
Even with avg
| Spec | L40 Ultra Gen 2 | Source | vs all robot vacuums |
|---|---|---|---|
| Runtime On the lowest suction setting. Expect about half on max power. | 231 min | Manufacturer spec sheet | beats 50% |
| Noise level Every 3 dB is roughly a doubling of sound energy. Under 60 dB is fine for running while you are home. | ? Not published |
5. Connectivity
0 of 4 known
| Spec | L40 Ultra Gen 2 | Source | vs all robot vacuums |
|---|---|---|---|
| Wi-Fi 2.4 GHz has longer range. Dual band helps in crowded apartment buildings. | ? Not published | ||
| Thread Low-power mesh used by Matter. Needs a Thread border router (HomePod mini, Nest Hub, SkyConnect…). | ? Not published | ||
| Zigbee Mature mesh protocol. Works locally with Zigbee2MQTT or ZHA in Home Assistant. | ? Not published | ||
| Bluetooth Usually only for setup or short-range control. | ? Not published |
6. Integrations
3 of 5 known
| Spec | L40 Ultra Gen 2 | Source | vs all robot vacuums |
|---|---|---|---|
| Matter Works with every major platform locally. Check which device types are supported — some features may stay app-only. | ? Not published | ||
| Home Assistant Core integrations ship with Home Assistant. HACS integrations are community-maintained and can break after updates. | HACS | HACS integration docs | |
| Alexa | Yes | Manufacturer spec sheet | |
| Google Home | Yes | Manufacturer spec sheet | |
| Apple Home | ? Not published |
7. Privacy & Local Control
0 of 4 known
| Spec | L40 Ultra Gen 2 | Source | vs all robot vacuums |
|---|---|---|---|
| Works offline Keeps working with your internet down — schedules, automations and local apps still run. | ? Not published | ||
| Cloud account required You must create a manufacturer account to set it up. Some devices stop working if the cloud shuts down. | ? Not published | ||
| Subscription for key features Features locked behind a monthly fee, e.g. history, AI detection or remote access. | ? Not published | ||
| Firmware updates via HA Update the firmware from Home Assistant without the vendor app (Zigbee2MQTT OTA, Matter OTA). | ? Not published |
Change history
Suggest a correction- Value added — Home Assistant HACS integration docs
- Value added — Alexa Manufacturer spec sheet
- Value added — Google Home Manufacturer spec sheet
Show 11 earlier changes Hide earlier changes
- Value added — Suction power Manufacturer spec sheet
- Value added — Mopping system Manufacturer spec sheet
- Value added — Mop lift height Manufacturer spec sheet
- Value added — Carpet detection Manufacturer spec sheet
- Value added — Navigation Manufacturer spec sheet
- Value added — Obstacle avoidance Manufacturer spec sheet
- Value added — Multi-floor maps Manufacturer spec sheet
- Value added — Robot height Manufacturer spec sheet
- Value added — Self-emptying Manufacturer spec sheet
- Value added — Dust bag capacity Manufacturer spec sheet
- Value added — Runtime Manufacturer spec sheet
Which version to buy where
Buy from the Amazon store in your country.
| Region | Buy |
|---|---|
| US for you | from $569.98 |
| UK | from £653.19 |
Price as of 4 Nov 2026 · amazon.com
Similar price, different trade-offs
C28
$499.98$799.99
- 15,000 PaSuction power: 15,000 Pa
- LiDARNavigation: LiDAR
- 11.06 cmRobot height: 11.06 cm
- Roller mopMopping system: Roller mop
Qrevo 2 Pro
$649.99$799.99
- 20,000 PaSuction power: 20,000 Pa
- LiDARNavigation: LiDAR
- 9.65 cmRobot height: 9.65 cm
- Rotating padsMopping system: Rotating pads
Roomba 115X Combo
$469.99
- 15,000 PaSuction power: 15,000 Pa
- LiDARNavigation: LiDAR
- 7.89 cmRobot height: 7.89 cm
- Static padMopping system: Static pad
Questions about the L40 Ultra Gen 2
Didn’t find your answer? Ask us
Does it work with Home Assistant?
Yes, via HACS. See the setup steps above.
Which version should I buy?
The US version (), sold on amazon.com. Other regions use different plugs and model numbers — see “Variants” above.
What warranty do I get?
The Dreame manufacturer’s warranty for your region. In the UK and EU you also have statutory rights against the seller; check the listing on Amazon for details.