Dolphin (Maytronics) Nautilus EON 120d vs Wybot S2
Researched by Riley Hart · prices checked Nov 4, 2026
As of Nov 4, 2026, the Dolphin (Maytronics) Nautilus EON 120d costs $849 and the Wybot S2 costs $760, so the Wybot S2 is $89 cheaper. Pick the Dolphin (Maytronics) Nautilus EON 120d for fine dirt and sun ledges. Pick the Wybot S2 for large pools on a mid range budget. The Wybot S2 wins 2 of 3 points we can measure.
Who wins, point by point
The Wybot S2 wins 2 of 3 points we can measure. Built from today's prices, the specs and independent tests for these two robots.
| Nautilus EON 120d | S2 | Winner | |
|---|---|---|---|
| Price today | $849 | $760 | S2 |
| Runtime | 150 min | 2 h (tested) | Nautilus EON 120d |
| Warranty | 1 year | 2 years | S2 |
- You care most about runtime (150 min vs 2 h (tested))
- Best for fine dirt and sun ledges
- You want to spend less (saves $89)
- You care most about warranty (2 years vs 1 year)
- Best for large pools on a mid range budget
- Cleans
- Floor
- Power
- Cordless
- Runtime
- 1.5 to 2.5 h cycles
- Max pool
- 50 ft long
Dolphin's cordless robot with fine backwash filter and ledge cleaning
Full Dolphin (Maytronics) Nautilus EON 120d review, pros and cons →- Cleans
- Floor
- Power
- Cordless
- Runtime
- Up to 210 min
- Max pool
- Up to 3,229 sq ft
Large pool cordless robot with 210 min rated runtime
Full Wybot S2 review, pros and cons →Side by side
| Dolphin (Maytronics) Nautilus EON 120d | Wybot S2 | |
|---|---|---|
| Price | $849 | $760 |
| 3 year cost | $849 | $760 |
| Our score | Not scored yet | Not scored yet |
| Rank in Pool | #27 | #25 |
| Status | on sale | on sale |
| Warranty | 1 year (Nautilus EON 120d listing) | 2 years |
| Pool types | In-ground and above-ground; rectangular, round, free form, kidney | Above-ground and in-ground (Wybot); max depth 9.8 ft (The Gadgeteer spec list) |
| Cleans | Floor, walls, waterline, steps, sun ledges as shallow as 8 in, corners | Floor, walls including tile, steps and waterline; 7 modes and 6 paths in the app, 3 on the robot (Wybot) |
| Power | Cordless, lithium-ion (capacity not published) | Cordless, 25.9 V 7,800 mAh battery, triple motors plus a brushless motor, 90 W (Wybot, The Gadgeteer) |
| Runtime | Cycles of 1.5, 2 or 2.5 h; Maytronics blog claims up to 4 h per charge; UltraRun short cycles claimed to last up to 2.5 weeks per charge | Up to 210 min (Wybot store today); PCWorld measured about 2 h 45 min against a 3.5 h claim at the time; The Gadgeteer saw about 3.5 h |
| Charge time | n/a | About 3 h (Wybot, PCWorld) |
| Filter | DebrisLock ultra fine backwash filter, top access | Dual layer filtration, mesh plus a removable foam filter (Wybot, The Gadgeteer); PCWorld found fine grit needed the secondary filter, which is not installed by default |
| Max pool size | Pools up to 50 ft long | Up to 3,229 sq ft (Wybot) |
| App | Maytronics One app for scheduling, monitoring and alerts | Wybot app over Wi-Fi with OTA updates and scheduling up to 4 cycles per 7 days; PCWorld found the cleaning history never worked |
| Weight | 24.255 lb | 19 lb (PCWorld); 18 lb 12 oz robot (The Gadgeteer) |
| Warranty | 1 year on the Nautilus listing (3 years on the store exclusive EON 120d listing) | 2 years plus 30 day returns (Wybot) |
| Best for | fine dirt and sun ledges | large pools on a mid range budget |
| Skip if | you hate fiddly filter cleaning | you want a polished app |
Specs are maker claims unless a reviewer is named. Prices from the stores we link, checked daily.
What reviewers found
Dolphin (Maytronics) Nautilus EON 120d
- PCWorld: Tested the EON 120d: DebrisLock filter trapped all types of debris and coverage reached about 95% on the longest cycle, but emptying the filter was a huge pain, it missed corners, failed to start twice at first, and often flipped onto its back. Source
- The Pool Nerd: Notes the EON line cleans water as shallow as about 8 in with better than basic mesh filtering, but still requires hooking, lifting, drying and charging; Clicker retrieval is mentioned for the 120d. Source
Wybot S2
- PCWorld: Picked up 99 of 100 synthetic leaves and captured organic debris and grit well with the secondary filter fitted. Ran about 2 h 45 min against a 3.5 h claim, moved in a haphazard pattern, and the app's cleaning history was unavailable throughout testing. Source
- The Gadgeteer: Tested the S2 Pro bundle with a self charging dock. Ran about 3.5 h, left the pool visibly cleaner, agitated the surface even at the 9 ft deep end, and its treads did not stick on the main drain. The dock bracket mounts permanently with adhesive. Source
Questions buyers ask
Which is better, the Dolphin (Maytronics) Nautilus EON 120d or the Wybot S2?
Pick the Dolphin (Maytronics) Nautilus EON 120d for fine dirt and sun ledges. Pick the Wybot S2 for large pools on a mid range budget.
Which is cheaper?
The Wybot S2 at $760, versus $849 for the Dolphin (Maytronics) Nautilus EON 120d, checked Nov 4, 2026. Over 3 years with running costs: $849 vs $760.
What is the difference between the Nautilus EON 120d and the S2?
Pool types: In-ground and above-ground; rectangular, round, free form, kidney on the Nautilus EON 120d, Above-ground and in-ground (Wybot); max depth 9.8 ft (The Gadgeteer spec list) on the S2. Cleans: Floor, walls, waterline, steps, sun ledges as shallow as 8 in, corners on the Nautilus EON 120d, Floor, walls including tile, steps and waterline; 7 modes and 6 paths in the app, 3 on… on the S2. Power: Cordless, lithium-ion (capacity not published) on the Nautilus EON 120d, Cordless, 25.9 V 7,800 mAh battery, triple motors plus a brushless motor, 90 W (Wybot… on the S2.
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