WYBOT S2
2-year limited warranty
- Cordless
- Up to 3,229 sq ft
- Floor + walls + waterline + steps
- Up to 210 minutes
WYBOT S2 vs Dolphin Nautilus EON 120D
See how these two robots compare—and why the Dolphin Sigma is the easy choice for corded cleaning with no battery downtime.
Dolphin Nautilus EON 120D
Nautilus™ (cordless)
1 year manufacturer warranty
- Cordless
- Up to 50 ft
- Floor + Walls + Waterline + Steps + Sun Ledge + Corners + Safety Ledge
- Self-cleaning backwash filter
Why corded wins
Corded Dolphin keeps cleaning when a WYBOT needs to recharge.
WYBOT removes the floating cable, but adds charging time, finite runtime and battery care. Dolphin Max-Series™ and ProLine™ stay ready for repeat cycles with reusable filtration and an authorized-dealer service path.
S2 runs on a battery
- No floating cable, but the robot must recharge after its available battery is used.
- Runtime: Up to 210 minutes
- Recharge time: 3 hours
Corded power keeps the next cycle ready
- No charging delay or finite battery runtime.
- Reusable MaxBin™, NanoFilters™ or MultiMedia™ filtration choices.
- Authorized-dealer support and genuine replacement parts.
Choose a Max-Series™ or ProLine™ Dolphin when immediate repeat cycles, no traction-battery charging routine and Maytronics' dealer-and-parts network matter more.
The Dolphins worth buying
Four corded picks. No battery compromises.
Every model below is ready for another full-capacity cycle as soon as the filter is rinsed. Choose the cleaning coverage and filtration that fit your pool.
No multi-hour charging break between cycles.
MaxBin™, NanoFilters™ or Premier MultiMedia™.
Manufacturer warranty, genuine parts and authorized dealers.
Max-Series™ · Best value
Dolphin Cayman
Corded floor-and-wall cleaning, a weekly timer and oversized MaxBin™ filtration for pools up to 40 ft.
$1049.0
Max-Series™ + ProLine™ · Best overall
Dolphin Quantum
Our all-around pick with floor-to-waterline cleaning, step coverage, app control, an XXL MaxBin™ and NanoFilters™.
$1599.0
ProLine™ · Best filtration
Dolphin Premier
The filtration specialist: standard cartridges, NanoFilters™ and an oversized leaf bag, backed by a 3-year warranty.
$1949.0
ProLine™ · Most advanced
Best match for this comparison
Dolphin Sigma
Our connected ProLine™ flagship with app control, gyroscope-guided navigation, waterline cleaning and a 3-year warranty.
$2349.0
| What to compare | S2 | Nautilus EON 120D |
|---|---|---|
| Pool and cleaning system | ||
| Power | Cordless 7,800 mAh lithium-ion battery; 90 W rated power | Cordless battery power |
| Pool rating | Up to 3,229 sq ft | Up to 50 ft |
| Cleaning coverage | Floor + walls + waterline + steps | Floor + Walls + Waterline + Steps + Sun Ledge + Corners + Safety Ledge |
| Runtime / cycle | Up to 210 minutes | 2 hours |
| Charging / repeat cycles | 3 hours to recharge | See the official model specification for charging details |
| Flow rate | 3,700 GPH rated flow | 4,000 GPH |
| Scrubbing system | Front high-speed scrubber; triple drive motors | 2 (active) |
| Filtration | 180 µm basket + 40 ppi cotton foam; no micron equivalent published for the foam | Self-cleaning backwash filter |
| Controls and ownership | ||
| Navigation | Six cleaning paths, seven app modes and self-parking | Smart Navigation with edge return |
| Scheduling / controls | Up to four scheduled cycles per week in the WYBOT app | Maytronics One + Weekly timer |
| Warranty | 2-year limited warranty | 1 year manufacturer warranty |
| What is included |
|
|
Sizing note: WYBOT rates pool area in square feet, while many Dolphins use maximum pool length. Measure your pool and match it to each rating instead of treating the numbers as interchangeable.
How S2 and Nautilus EON 120D compare
The WYBOT S2 is cordless and rated for up to 3,229 sq ft. It cleans floor + walls + waterline + steps and uses 180 µm basket + 40 ppi cotton foam; no micron equivalent published for the foam filtration. Runtime: Up to 210 minutes.
The Dolphin Nautilus EON 120D comes from the Nautilus™ (cordless) lineup. It is rated for up to 50 ft and cleans floor + walls + waterline + steps + sun ledge + corners + safety ledge with Self-cleaning backwash filter filtration. Its standard cycle is 2 hours.
The easy choice: corded Dolphin
The S2 removes the floating cable, but it adds charging time, finite runtime and battery care to the cleaning routine.
We recommend the Dolphin Sigma. It delivers corded cleaning with no recharge delay, plus it is the ProLine™ flagship, combining triple commercial-grade motors with app control and gyroscope-guided SmartNav 3.0™ for Dolphin’s most advanced clean.
Large-pool note: do not substitute a 50 ft residential Dolphin for a pool that genuinely requires a larger published rating. Size the cleaner to the actual pool before comparing convenience or price.
Ready to choose your Dolphin?
Start with Max-Series™ for corded value, or step up to ProLine™ for our strongest residential filtration and coverage.
S2 vs Nautilus EON 120D FAQ
Is WYBOT S2 better than Dolphin Nautilus EON 120D?
For most pool owners, we recommend a corded Dolphin Max-Series™ or ProLine™ robot. WYBOT S2 removes the cable, but it also adds charging time, finite runtime and battery care.
What is the biggest difference between these two cleaners?
WYBOT removes the floating cable, but adds charging time, finite runtime and battery care. Dolphin Max-Series™ and ProLine™ stay ready for repeat cycles with reusable filtration and an authorized-dealer service path.
Can their pool-size ratings be compared directly?
No. WYBOT rates pool area in square feet, while many Dolphins use maximum pool length. Measure your pool and match it to each rating instead of treating the numbers as interchangeable.
Which Dolphin is your pick?
Start with the Dolphin Sigma from the ProLine™: it is the ProLine™ flagship, combining triple commercial-grade motors with app control and gyroscope-guided SmartNav 3.0™ for Dolphin’s most advanced clean.
Sources and specifications
We reviewed these manufacturer pages and policies on November 9, 2026. Specifications, prices and app features can change.