Imagine a pool that cleans itself while you relax, free from tangled cords and complicated setups. That is the promise of the Dolphin Nautilus EON series, and it delivers. Whether you own a mid-sized in-ground pool or one with tricky sun ledges, choosing between the EON 100 and the EON 120d can feel overwhelming. We have spent hours evaluating these two models, and this guide breaks down every difference to help you decide which cordless robot fits your lifestyle. For more insights, explore our best Dolphin Nautilus pool cleaner for the money guide.
Pros
- Fully cordless design eliminates cable tangles and simplifies setup.
- Wi-Fi app control offers convenient scheduling and mode customization.
- Effective wall climbing and waterline scrubbing for a thorough clean.
- Large top-load filter basket is easy to clean and maintain.
Cons
- Battery runtime of 2.5 hours may not be sufficient for very large or heavily soiled pools.
- Requires Wi-Fi connection for full app functionality; offline operation limited to manual start.
- No included charging dock or caddy for storage; must place on a flat surface to charge.
The Dolphin Nautilus EON 100 is a cordless robotic pool cleaner designed for in-ground pools up to 50 feet. It is ideal for pool owners who want a tangle-free cleaning experience with the convenience of smartphone control. This model combines the reliability of Dolphin's cleaning technology with a rechargeable battery and smart navigation.
Its cordless design eliminates the hassle of cords, while the Wi-Fi app lets you schedule cleanings from anywhere. The robot actively climbs walls and scrubs the waterline, ensuring every surface is clean. With up to 2.5 hours of runtime, it can handle most residential pools in a single cycle.
The Nautilus EON 100 features a robust build with a top-load filter basket that is easy to access and clean. Its smart navigation system reduces missed spots, moving efficiently across the pool floor and walls. The blue and black color scheme is sleek and modern.
One potential drawback is the 2.5-hour battery life, which might not be enough for very large pools or heavy debris. Additionally, the robot requires Wi-Fi for full app features, and it does not come with a charging stand. However, these are minor trade-offs for the convenience of cordless operation.
Overall, the Dolphin Nautilus EON 100 is an excellent choice for pool owners seeking a cordless, app-controlled cleaner with strong performance. Its ability to scrub walls and waterline, combined with easy maintenance, makes it a solid investment for keeping your pool swim-ready.
Color: Blue/Black
Dimensions: 6.96 x 6.38 x 4.39 inches
Product Group: Lawn & Patio
Battery Runtime: Up to 2.5 hours
Pool Size: Up to 50 feet
Buying Guide
Runtime and Cleaning Modes
Battery life directly affects how thoroughly your pool gets cleaned. The Dolphin Nautilus EON 100 offers up to 2.5 hours of cordless runtime, enough for most residential pools up to 50 feet. If you need more flexibility, the EON 120d provides up to 4.5 hours and includes multiple cleaning modes such as floor-only, waterline-only, and eco mode. This makes the EON 120d ideal for larger pools or for those who want to customize cleaning cycles.
Consider your pool size and how often you clean. A longer runtime means fewer charges and more consistent coverage, especially if you run the cleaner daily.
Filtration System
Both models use advanced filtration, but they differ in design. The EON 100 features a top-load filter basket that is easy to remove and rinse, capturing leaves and large debris. The EON 120d uses multi-layer cartridge filtration, which traps ultra-fine particles and larger debris alike, resulting in crystal-clear water. If you struggle with cloudy water or fine particles, the EON 120d’s filtration is a clear advantage.
Ease of maintenance also matters. The top-load basket on the EON 100 is simpler to clean, while the cartridge system on the EON 120d requires occasional rinsing but offers superior water clarity.
Navigation and Coverage
Smart navigation ensures the robot covers every inch of your pool. The EON 100 uses intelligent scanning to move efficiently across floors and walls, reducing missed spots. The EON 120d goes further with advanced navigation that also scrubs waterlines, stairs, corners, and shallow sun ledges down to 8 inches. For pools with complex shapes or sun shelves, the EON 120d is the better choice.
Both models return to the pool edge at the end of their cycle, making retrieval easy. This feature is especially handy for cordless cleaners, as you do not need to fish for a cord.
App Connectivity and Control
Both the EON 100 and EON 120d connect to the MaytronicsOne app, allowing you to start, stop, schedule, and customize cleaning modes when the robot is out of the water. This Wi-Fi connectivity adds convenience, especially if you want to set a cleaning schedule while away from home. The app interface is intuitive, making it easy to switch between modes or check battery status.
For those who value smart home integration, these robots fit seamlessly into a connected pool ecosystem. Check out our best dolphin nautilus wall climbing pool cleaners for more options.
Final Thoughts
Choosing between the Dolphin Nautilus EON 100 and the EON 120d ultimately comes down to your pool’s size and your cleaning priorities. For most pool owners with standard in-ground pools, the Dolphin Nautilus EON 100 Cordless Robotic Pool offers excellent value with its 2.5-hour runtime and simple top-load filter. If you have a larger pool, need longer runtime, or want superior filtration and sun ledge cleaning, the Dolphin Nautilus EON 120D Cordless Robotic Pool is the premium pick that delivers comprehensive coverage and crystal-clear water. Both models represent the best in cordless pool cleaning technology for 2026.
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Frequently Asked Questions
How long does the Dolphin EON 120d battery last?
The Dolphin Nautilus EON 120d offers up to 4.5 hours of runtime, depending on the cleaning mode selected. This allows it to cover larger pools or run multiple cleaning cycles on a single charge.
Can the Dolphin EON 100 clean pool steps and sun ledges?
Yes, the EON 100 can scrub floors, walls, waterline, steps, and sun ledges. However, the EON 120d is specifically designed to handle shallow sun ledges down to 8 inches, making it more effective for pools with these features.
Do these cordless pool cleaners require any installation?
No installation is needed. Simply charge the battery, place the robot in the pool, and start cleaning via the MaytronicsOne app. For more tips, see our best dolphin nautilus cleaner for large pools guide.
How do I clean the filter on the Dolphin EON 100?
The EON 100 features a top-load filter basket. Simply lift the basket out, rinse it with a garden hose, and replace it. This process takes only a minute and keeps the robot ready for its next cycle.
