Dreame L40 Ultra A vs Dreame L40 Ultra AE

Introduction\

The Dreame L40 Ultra A and the Dreame L40 Ultra AE represent two consecutive generations within Dreame's high-end range of robot vacuum cleaners with multifunction docks. The AE model arrived on the market in 2025, while the L40 Ultra A was introduced in April 2026 as its evolution. Both are designed for homes looking for a complete automated cleaning solution, with the ability to vacuum and mop autonomously thanks to docks that wash and dry the mops.\

These models share the same architecture and many features, but the technical differences between them can be decisive depending on the type of home and cleaning needs. They are robots designed for users who value full autonomy and prefer to delegate as much maintenance as possible.\

Suction Power and Vacuuming\

Suction power marks a notable difference between the two models. The Dreame L40 Ultra A delivers 24,000 Pa, a significant increase over the 19,000 Pa of the L40 Ultra AE. This difference can be particularly noticeable on medium- or deep-pile carpets, where extracting embedded dirt is more demanding.\

Both robots use the same TriCut 3.0 main brush, which combines bristles with blades designed to cut hair and prevent tangles. However, the L40 Ultra AE adds the ability to lift this brush during mopping, preventing moisture from reaching the roller when only the mop is needed. The L40 Ultra A keeps the brush fixed, although in practice this is not a major issue if the cleaning mode is managed correctly.\

As for the side brush, the L40 Ultra A includes an anti-tangle system, something the AE does not offer. In homes with long-haired pets, this can reduce manual maintenance. Neither model includes an extendable or liftable side brush, features that are available on some other high-end models on the market.\

Mopping\

Both robots use two rotating mops that spin at 180 RPM, with lateral extension through Dreame's RoboSwing system. This movement allows the mops to get closer to edges and skirting boards, improving coverage in areas that are often left unmopped. The mops lift up to 10.5 mm when the robot detects carpets or when vacuum-only mode is activated.\

The most relevant difference in the mopping system lies in the dock. The Dreame L40 Ultra AE washes the mops with hot water at 75°C, helping to dissolve grease more effectively and remove bacteria. The L40 Ultra A uses cold water to wash the mops, although both dry them with hot air at 45°C. In practice, hot-water mop washing makes a noticeable difference in kitchens or areas with greasy dirt.\

The L40 Ultra AE includes dirt detection both on the mops and on the floor, allowing the robot to adjust mopping intensity and decide whether it needs to wash the mops again or revisit an area. The L40 Ultra A does not include this technology, so it follows predefined patterns without adapting to the actual dirt detected during cleaning.\

Neither model can automatically detach the mops at the dock for vacuum-only cleaning without dragging the dry mops across the floor, a feature offered by some high-end competitors.\

Navigation System\

Both models use a 360° LiDAR turret to map the home and navigate accurately. Both include a front-facing 3D laser sensor that detects low obstacles and allows the robot to avoid them without colliding. They also recognise pets and adjust navigation to avoid disturbing them during cleaning.\

The key difference lies in the AI camera. The Dreame L40 Ultra AE integrates a front-facing camera with visual recognition of up to 120 obstacles, remote access from the app and a night-vision LED for operating in low-light conditions. This allows the robot to be used as a mobile surveillance camera or to visually check the state of the home while cleaning.\

The L40 Ultra A does without the AI camera, simplifying the system and reducing the number of components that may require maintenance, but it removes the possibility of visual remote access and advanced object recognition. For users concerned about privacy or who do not value video surveillance, this absence may even be an advantage.\

The intelligent cleaning system also differs: CleanGenius 3.0 on the L40 Ultra A compared with CleanGenius 2.0 on the AE. The third generation of the algorithm improves route planning and the management of complex areas, although in everyday use the difference is usually not dramatic.\

Runtime and Battery\

Both robots use a 5,200 mAh battery. The Dreame L40 Ultra A specifies a runtime of 230 minutes, enough to cover large homes in a single session. The L40 Ultra AE does not detail this figure in its specifications, although given the same battery capacity and similar characteristics, comparable performance can be expected.\

The higher suction power of the L40 Ultra A may consume slightly more energy at maximum power, but in automatic or medium modes the difference is marginal. In any case, both models are designed to handle homes of up to 200-250 m² without major runtime issues.\

Smart Features\

Both robots can cross obstacles up to 20 mm high, allowing them to move over small level differences, thick cables or transitions between flooring types without getting stuck. This capability is useful in homes with different types of flooring or short-pile carpets.\

Neither model features a robotic arm or built-in voice assistant, but both are compatible with Alexa and Google Home for voice control through external assistants. Integration with these ecosystems allows you to start cleaning, pause the robot or send it back to the dock without opening the app.\

Multifunction Cleaning Dock\

Both docks automatically empty the robot's dustbin into a 3.2-litre bag, wash the mops and dry them with hot air at 45°C. The clean water tanks (4.5 litres) and dirty water tanks (4 litres) are identical, providing enough capacity for several mopping sessions without manual intervention.\

The wash tray self-cleaning system is third generation on the L40 Ultra A, compared with second generation on the AE. This means a more efficient system for keeping the dock itself clean, reducing the accumulation of debris in the area where the mops are washed.\

The detergent tank is integrated into the L40 Ultra AE, automatically dispensing cleaning solution during mop washing. On the L40 Ultra A, this tank is optional and must be purchased separately, which may result in additional cost if you want to automate detergent use.\

Both models offer an optional plumbing connection kit, allowing the dock to be supplied directly from the water system and dirty water to be drained without manually filling or emptying tanks. This kit is sold separately for both models.\

Dimensions\

Both robots have a diameter of 350 mm and a height of 97 mm, standard dimensions for high-end robot vacuum cleaners. This height allows them to fit under most furniture, although it is advisable to measure the clearance if you have very low sofas or beds.\

The docks are also practically identical in size: 340 mm wide, around 590 mm high and 457 mm deep. The differences are minimal and do not affect placement or the space required for installation.\

Real-World User Experience\

The Dreame L40 Ultra A is aimed at users who prioritise suction power and prefer to avoid a camera for privacy reasons or simply because they do not need one. Its greater suction capacity is useful in homes with carpets or pets that shed a lot of hair. The anti-tangle side brush system reduces maintenance in these situations.\

The Dreame L40 Ultra AE is more complete in terms of mopping features thanks to hot-water mop washing and dirt detection, which intelligently adjusts cleaning. The AI camera with remote access adds versatility for users who value home monitoring or want to visually check cleaning progress from the app. The integrated detergent tank also simplifies everyday use.\

For large homes, both offer sufficient runtime, although the L40 Ultra A clearly specifies its 230 minutes. In homes with long-haired pets, the L40 Ultra A's anti-tangle side brush system can make a difference in weekly maintenance.\

The AE's hot-water mop washing is particularly useful in kitchens or areas where grease tends to accumulate, while the L40 Ultra A may require occasional additional manual mop washing if the same level of hygiene is desired.\

Conclusion: Which One Should You Choose?\

\Choose the Dreame L40 Ultra A if:\ you are looking for maximum suction power and have carpets or pets that shed a lot of hair. It is also a good choice if you prefer a robot without a camera for privacy reasons or simply do not need visual remote access. The third-generation wash tray self-cleaning system and CleanGenius 3.0 algorithm provide slightly greater efficiency, although you will need to purchase the detergent tank separately if you want to automate detergent use.\

\Choose the Dreame L40 Ultra AE if:\ you value more efficient mopping thanks to 75°C hot-water mop washing and dirt detection that intelligently adjusts cleaning. The AI camera with remote access and night-vision LED adds extra functionality for surveillance or visual monitoring. The integrated detergent tank simplifies maintenance, while the liftable main brush during mopping prevents it from getting unnecessarily wet. It is a more complete option in terms of smart features, although it offers slightly less raw suction power.\

Both robots are designed for large homes, with multifunction docks that minimise manual maintenance. The choice depends on whether you prioritise pure power and simplicity or prefer a more sophisticated system for mopping and artificial intelligence.\