Dolphin Nautilus EON 120D
$1199
1 year manufacturer warranty
Dolphin Nautilus EON 120D vs Dolphin M550
A side-by-side comparison of the Dolphin Nautilus EON 120D and Dolphin M550 — price, filtration, cleaning coverage, brushes and warranty — to help you pick the right Dolphin robotic pool cleaner.
Dolphin M550
MSRP $1999
3 years manufacturer warranty
| Feature | Nautilus EON 120D | M550 |
|---|---|---|
| Overview | ||
| Price | $1199 | MSRP $1999 |
| Lineup | Nautilus™ (cordless) | M-Series™ |
| Best for | Longest cordless runtime | Specialty-retailer flagship |
| Pool size | Up to 50 ft | Up to 50 ft |
| Cleaning coverage | Floor + Walls + Waterline + Steps | Floor + Walls + Waterline |
| Cleaning cycle | Up to 4.5 hours per charge | 2 hours |
| Suction | Battery powered | 5,000 GPH |
| Scrubbing brushes | 1 (active) | 2 (active) |
| Filtration | Multi-layer top-load cartridge | Fine + ultra-fine filter basket |
| Standout features | ||
| Waterline cleaning | Included | Included |
| 3-year warranty | No | Included |
| NanoFilters™ included | No | No |
| MultiMedia™ filtration | No | No |
| Media-Alert™ | No | No |
| Oversized leaf bag | No | No |
| MaxBin™ filtration | No | No |
| HyperBrush™ scrubbing | No | No |
| App control | Included | Included |
| Anti-tangle swivel | No | Included |
| Corded power | No | Included |
| Navigation & ownership | ||
| Navigation | Smart Navigation with edge return | Not published |
| Weekly scheduling | Scheduling in the app | Weekly timer |
| App control | MaytronicsOne (Wi-Fi) | myDolphin™ Plus app |
| Cable | None (cordless) | Anti-tangle swivel cable |
| What is included |
|
|
| Warranty | 1 year | 3 years |
Dolphin Nautilus EON 120D vs Dolphin M550: how they compare
The Dolphin Nautilus EON 120D is part of the Nautilus™ (cordless) lineup — the step-up cordless Nautilus: up to 4.5 hours per charge, five cleaning modes and automatic edge return. It cleans pools up to 50 ft with floor + walls + waterline + steps coverage and Multi-layer top-load cartridge filtration, backed by a 1-year warranty.
The Dolphin M550 is part of the M-Series™ lineup — a specialty-retailer flagship with myDolphin™ Plus app control and a caddy in the box. It handles pools up to 50 ft with floor + walls + waterline coverage and Fine + ultra-fine filter basket filtration, backed by a 3-year warranty.
Our verdict: the Dolphin M550 wins
Between these two, the Dolphin M550 is the stronger robot on paper — a specialty-retailer flagship with myDolphin™ Plus app control and a caddy in the box. It cleans with floor + walls + waterline coverage and Fine + ultra-fine filter basket filtration, backed by a 3-year warranty.
Our top recommendation: neither of these is in our two best lineups. For the best clean in this price range, step up to the Dolphin Quantum Pro from our ProLine™ — our top pick, highlighted at the top of this comparison.
Not sure yet? We're here to help
Every Dolphin Max-Series™ and ProLine™ robotic pool cleaner ships free and is backed by a full manufacturer warranty — explore our top-recommended robots and find the right fit for your pool.
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