Select and compare
BWT ES Nano vs. Dolphin Nautilus CC compared
Robotic Pool Cleaner
At a glance
The key numbers for both devices side by side.
Overall rating
5454Schwach
5858Schwach
Value for money
26Mediocre
26Mediocre
Best price
€499.00
€699.00
Price advantage
€200.00 cheaper
—
Offers
1 shop
1 shop
Rank in category
Rank 45 of 45
Rank 43 of 45
Rating
Sub-ratings compared
BWT ES NanoOverall rating 54Dolphin Nautilus CCOverall rating 58
BWT ES NanoDolphin Nautilus CC
Cleaning results54/10066/100
Navigation & reliability50/10046/100
Runtime & endurance56/10058/100
Handling & maintenance56/10076/100
App & build quality52/10038/100
Cleaning results
54
66
Navigation & reliability
50
46
Runtime & endurance
56
58
Handling & maintenance
56
76
App & build quality
52
38
Specs
Specs compared
Key specs
Brand
Model
ES Nano
Nautilus CC
Cleaning coverageAreas the robot cleans according to the manufacturer – only with walls and waterline is no dirt ring left; top models also skim leaves from the surface, pure skimmers clean only the surface
FloorWallsWaterline
FloorWalls
Max. pool areaLargest pool area according to the manufacturer in m² – some manufacturers state only the pool length instead
50 m² (538 sq ft)
Power supplyBattery or floating cable according to the manufacturer – battery robots don’t get tangled, corded robots run without a break
Battery (cordless)
Cable
Suitable forPool types the manufacturer approves the robot for
In-ground poolAbove-ground pool
In-ground pool
NavigationHow the robot moves according to the manufacturer – systematic navigation and mapping cover the pool faster and more completely
Systematic (gyroscope)
Battery lifeRuntime per charge in the standard program according to the manufacturer in minutes
180 min
Cleaning
ChassisHow the robot moves according to the manufacturer – tracks climb walls and steps and roll over liner folds, wheels and rollers get stuck on edges more easily; propellers drive floating skimmers
Tracks (rubber)
Brush typeType of main brushes according to the manufacturer – PVC, nylon and plastic brushes count as bristles, PVA is the absorbent foam roller that also grips smooth tiles; a "combined brush" usually means bristles plus PVA
Bristles
Saltwater compatibleThe manufacturer explicitly approves the robot for saltwater pools – if not stated, the field stays empty
Yes
Flow rateVolume of water the pump draws through the filter per hour according to the manufacturer, in m³/h – a higher flow rate also picks up heavy debris
13 m³/h
15 m³/h
Cleaning programsCleaning programmes according to the manufacturer – "Smart", "Auto" or "Standard" is the full clean of floor and walls, "Quick" or "Turbo" the quick programme, "Enhanced" or "Ultra" the intensive programme; a quick programme is enough for the daily round
Floor onlyWalls onlyFloor and walls
Floor and walls
Suitable pool surfacesPool surfaces the manufacturer approves the robot for – "pebble" and pebble plaster count as concrete, "vinyl" and "liner" as liner, fibreglass and GRP as polyester
ConcretePolyesterVinyl liner
Program durationDuration of the standard program according to the manufacturer in minutes
150 min
120 min
Filter & maintenance
Filter typeType of debris container according to the manufacturer
Filter basket
Full filter indicatorSignals a full filter on the robot or in the app, according to the manufacturer
No
Filter finenessFineness of the finest included filter according to the manufacturer in microns – the smaller the number, the finer the filter, but it clogs faster
180 µm
Battery & cable
Charging timeCharging time from empty to full according to the manufacturer in minutes
360 min
ChargingHow the battery is charged according to the manufacturer – with a plug on the device the socket must be dry; a dock sometimes also rinses the filter but then needs a water connection
Charging cable on the device
Cable lengthLength of the floating cable according to the manufacturer in m – it must reach from the power adapter to the farthest corner
12 m (39 ft)
Anti-twist systemA swivel in the cable prevents the floating cable from twisting, according to the manufacturer
No
Controls
Obstacle detectionHow the robot detects walls, steps and obstacles according to the manufacturer – with ultrasound, laser or camera before it bumps into them; "ultrasonic radar" and "sonar" are ultrasound, 3D ToF and point laser are laser/ToF
Infrared
Remote controlA remote control is included, according to the manufacturer
No
ScheduleCleaning can be repeated on a schedule, according to the manufacturer
No
App controlCan be controlled via app, not just by remote, according to the manufacturer
Yes
No
RetrievalHow the robot is ready for removal after cleaning according to the manufacturer – without a retrieval aid it stays on the bottom and has to be fished out with a hook
Parks at the pool edge
Dimensions & weight
WeightWeight of the robot according to the manufacturer in kg, without water and without the cart – matters when lifting it out
7.5 kg (17 lb)
6.71 kg (15 lb)
Water depth up toMaximum water depth the manufacturer approves the robot for, in m
4 m (13 ft)
Pool length up toMaximum pool length the manufacturer approves the robot for, in m
10 m (33 ft)
10 m (33 ft)
Transport cart includedA cart for storing and moving the robot is included, according to the manufacturer
No
DimensionsExternal dimensions according to the manufacturer in cm (W × D × H)
40 × 22 × 37 cm (16 × 8.7 × 15 in)
40.07 × 43.67 × 26.25 cm (16 × 17 × 10 in)
General
Warranty
2 years
Model year
2026
In the box
Poolroboter, Schwimmkabel (12 m), Netzteil, Filterkorb mit Standardfiltern, Handbuch
Prices
Offers
Verdict
Pros & cons
Der BWT ES Nano ist ein schlichter Akku-Poolroboter für kleine Becken bis 10 m, der ohne Kabel Boden und Wände abfährt und am Ende am Rand parkt. Der wechselbare Akku reicht für genau einen Lauf von 150 min. Der Haken: Wie gründlich er Wasserlinie und Stufen reinigt, ist kaum belegt, und der 180-µm-Filter lässt Feinstaub durch.
Pros
- Kabellos: kein Schwimmkabel, kein Netzteil am Beckenrand
- Akku mit 4500 mAh wechselbar, verlängert die Lebensdauer
- Parkt nach dem Programm am Beckenrand, kein Haken nötig
- Salzwasser bis 4.000 ppm zulässig
- Modus auch ohne App direkt am Gerät wählbar
Cons
- Filter mit 180 µm hält Feinstaub und Pollen kaum zurück
- Eine Ladung reicht nur für einen Lauf, Laden dauert 5 bis 6 h
- Mit 7,5 kg trocken schwerer als die Kabelmodelle der Serie
- Keine Ladestation, Filter muss nach jedem Lauf gespült werden
- WLAN nur im 2,4-GHz-Netz
Der Dolphin Nautilus CC ist ein schlichter Kabelroboter auf Raupen, der Boden und untere Wände solide sauber bürstet und Laub zuverlässig aufnimmt. Er passt zu dir, wenn dein Becken eben ist und höchstens 10 m lang. Der Haken: kein Timer, kein Drehgelenk. Jeden Lauf startest du von Hand, das Kabel verdreht sich, und die Wasserlinie bleibt Handarbeit mit Bürste.
Pros
- Rotierende Bürsten reinigen den Beckenboden gründlich
- Nimmt Laub, Zweige und Grasschnitt zuverlässig auf
- Gummiraupen klettern auch auf Folie die Wand hoch
- Mit 6,71 kg allein aus dem Wasser zu heben
- Filterkorb ohne Werkzeug zu entnehmen und auszuspülen
- Vormontiert, Start per Knopfdruck ohne Einarbeitung
Cons
- Kabel ohne Drehgelenk verdreht sich, bis der Roboter festsitzt
- Kein Wochentimer, jeder 120-min-Lauf startet von Hand
- Ecken und Bodenstreifen an der Wand bleiben teils schmutzig
- Standardfilter lässt feinen Sand teils durch
- Kabeldefekte und Antriebsausfälle nach ein bis zwei Jahren
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