Dolphin (Maytronics) Nautilus EON 120d vs Dolphin (Maytronics) Premier
Researched by Riley Hart · prices checked Oct 26, 2026
As of Oct 26, 2026, the Dolphin (Maytronics) Nautilus EON 120d costs $1,199 and the Dolphin (Maytronics) Premier costs $2,499, so the Dolphin (Maytronics) Nautilus EON 120d is $1,300 cheaper. The Dolphin (Maytronics) Premier has a published review score and ranks #5 in our robotic pool cleaners ranking; the Dolphin (Maytronics) Nautilus EON 120d is not scored yet. Pick the Dolphin (Maytronics) Nautilus EON 120d for fine dirt and sun ledges. Pick the Dolphin (Maytronics) Premier for leafy in-ground pools.
- Cleans
- Floor
- Power
- Cordless
- Runtime
- 1.5 to 2.5 h cycles
- Max pool
- 50 ft long
A good fit for cordless buyers who care most about trapping fine dirt and want a robot that reaches 8 inch sun ledges. PCWorld found its filter caught debris very well but was a real chore to empty, and it sometimes missed corners and leaves on steps. Check the warranty, which is only 1 year on the Nautilus listing.
Full Dolphin (Maytronics) Nautilus EON 120d review →- Cleans
- Floor
- Power
- Corded
- Runtime
- 3 h cycle
- Max pool
- 50 ft long
A proven corded cleaner for in-ground pools that get leaves, with a weekly timer and filter options from a big leaf bag to fine cartridges. It has no app and weighs about 20 lb dry. Maytronics showed it as unavailable on its own store when checked, so expect to buy from a dealer.
Full Dolphin (Maytronics) Premier review →Side by side
| Dolphin (Maytronics) Nautilus EON 120d | Dolphin (Maytronics) Premier | |
|---|---|---|
| Price | $1,199 | $2,499 |
| 3 year cost | $1,199 | $2,624 |
| Our score | Not scored yet | 6.5/10 |
| Rank in Pool | #11 | #5 |
| Status | on sale | on sale |
| Warranty | 1 year (Nautilus EON 120d listing) | 3 years |
| Pool types | In-ground and above-ground; rectangular, round, free form, kidney | In-ground; rectangular, round, free form, kidney |
| Cleans | Floor, walls, waterline, steps, sun ledges as shallow as 8 in, corners | Floor, walls, waterline |
| Power | Cordless, lithium-ion (capacity not published) | Corded |
| 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 | Default 3 h cycle; no battery |
| Charge time | n/a | None (corded) |
| Filter | DebrisLock ultra fine backwash filter, top access | Multi layer: bottom load filter bag or cartridges, fine filter kit included; full filter indicator |
| Max pool size | Pools up to 50 ft long | Pools up to 50 ft long |
| App | Maytronics One app for scheduling, monitoring and alerts | None; no Wi-Fi |
| Weight | 24.255 lb | 20.286 lb |
| Warranty | 1 year on the Nautilus listing (3 years on the store exclusive EON 120d listing) | 3 years |
| Timer | n/a | Weekly timer |
| Best for | fine dirt and sun ledges | leafy in-ground pools |
| Skip if | you hate fiddly filter cleaning | you want app control |
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
Dolphin (Maytronics) Premier
- Bob Vila (9/10): Cleaned light leaf litter, tile line algae and storm dirt in a Miami pool, ran quietly at about 5 cents per hour, but was heavy to lift and the caddy and remote cost extra. Source
- The Pool Nerd: Names it the author's personal favorite after testing about 30 robots, citing suction, filter choices and the 3 year warranty. Affiliate site with links to Dolphin dealers. Source
Pros and cons
Dolphin (Maytronics) Nautilus EON 120d
Pros
- Very effective fine debris filter per PCWorld
- Cleans ledges as shallow as 8 in
- App scheduling with UltraRun short cycles
- Handled stairs well in testing
Cons
- Filter is hard to empty per PCWorld
- Missed corners and some step leaves
- Battery size and charge time not published
- 1 year warranty on the Nautilus version
Dolphin (Maytronics) Premier
Pros
- Weekly timer, no charging
- Swappable leaf bag and fine filters
- Bob Vila found it cleaned leaves, tile line algae and storm dirt
- 3 year warranty
Cons
- No app or Wi-Fi
- Heavy when full of water
- Cord to manage
- Shown unavailable on the Maytronics store when checked
Questions buyers ask
Which is better, the Dolphin (Maytronics) Nautilus EON 120d or the Dolphin (Maytronics) Premier?
The Dolphin (Maytronics) Premier has a published review score and ranks #5 in our robotic pool cleaners ranking; the Dolphin (Maytronics) Nautilus EON 120d is not scored yet. Pick the Dolphin (Maytronics) Nautilus EON 120d for fine dirt and sun ledges. Pick the Dolphin (Maytronics) Premier for leafy in-ground pools.
Which is cheaper?
The Dolphin (Maytronics) Nautilus EON 120d at $1,199, versus $2,499 for the Dolphin (Maytronics) Premier, checked Oct 26, 2026. Over 3 years with running costs: $1,199 vs $2,624.
What is the difference between the Nautilus EON 120d and the Premier?
Pool types: In-ground and above-ground; rectangular, round, free form, kidney on the Nautilus EON 120d, In-ground; rectangular, round, free form, kidney on the Premier. Cleans: Floor, walls, waterline, steps, sun ledges as shallow as 8 in, corners on the Nautilus EON 120d, Floor, walls, waterline on the Premier. Power: Cordless, lithium-ion (capacity not published) on the Nautilus EON 120d, Corded on the Premier.
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See the ranking →Affiliate links. We may earn a commission. It never changes our score. Disclosure