Dolphin EON 100 review

The Dolphin EON 100, Product No. 99994400-US, is the store-exclusive U.S. record for a cordless robotic pool cleaner rated by Maytronics for pools up to 50 feet. It is distinct from the NAUTILUS EON 100 99994401-PC record: the names and item numbers differ, and the exact product pages list two years versus one year of warranty. This is a comparison of manufacturer material, not a hands-on pool test or an ownership review.

A broader coverage case than the smaller cordless models

The exact -US product page lists floor, wall and waterline cleaning, identifies waterline scrubbing as Yes, and includes steps, sun ledges, corners and a safety ledge in its coverage fields. Its page also describes sun ledges as shallow as eight inches. The EON 100/120d manual provides a corresponding Full Coverage mode and separate Floor-Only and Waterline-Only modes. The stated 50-foot pool-length limit and cordless design make it a candidate for a larger residential pool where avoiding a power cable and reaching a shallow ledge are priorities. Shape and transitions still matter; the published rating is not a measured outcome for every pool.

The EON family instructions say Full Coverage is recommended when the pool is dirty, while the UltraRun feature spreads cleaning into shorter sessions on one charge. Maytronics lists a two-hour default and cycle choices of 1.5, 2 or 2.5 hours on the exact listing. Its public copy says the scheduler can keep a pool clean across a week on one charge, but the manual’s useful operational point is that UltraRun is multiple shorter cycles, not a substitute for checking the chosen schedule and pool needs. The Clicker can cancel a schedule when used to remove the robot; the manual says to restart UltraRun before returning it to the water.

App support is between cycles, not underwater steering

Maytronics One is documented for scheduling, cleaning-mode configuration, battery status, cleaning history, troubleshooting and homing-wall preferences. The manual explains that the phone first connects over Bluetooth and can use Wi-Fi for functions such as updates and remote status checks. It also says the app cannot communicate with the cleaner while it is in the water. A 2.4 GHz Wi-Fi network is required by the manual’s troubleshooting guidance. That makes the app a useful setup and monitoring layer, but it should not be chosen as a submerged joystick.

Resolve the filter label before comparing replacement costs

Filtration is the least settled headline specification on the exact -US page. The feature section describes a sealed 70-micron Monoblock filter, but the Tech Specs table calls the filter a Fine Filter Kit. The line-level EON comparison also identifies the EON 100 as a 70-micron Monoblock filter. The family manual shows a DebrisLock or Monoblock basket, without tying that choice to each U.S. package. Because the manufacturer’s own material is inconsistent, this review does not infer a filter-media type, micron rating, spare-panel inclusion or service cost. Ask the seller to identify the basket and replacement components for the exact 99994400-US carton.

The EON overview also says Clicker and pickup are not included with the EON 100, while the family manual’s generic box illustration depicts a Clicker and marks a grab hook as optional. Confirm those retrieval items in the actual offer. The product page does identify top access, and the manual recommends a quick rinse after removal; if the exact basket has cleanable panels, the manual provides periodic hose-cleaning instructions. The page’s filter wording should be resolved before choosing between cartridge and monoblock maintenance routines.

Pool conditions, charging and the published warranty

The manual specifies a water-depth range of 8 inches to 10 feet; water from 41–95°F; chlorine no higher than 4 ppm; pH between 7.0 and 7.8; and no more than 5,000 ppm salt. It warns against use after liquid flocculant or another clarifier is added. Charge only with the original charger in a dry, shaded place, keep it at least 10 feet from the pool edge during operation, and remove the robot before people enter the pool. A full charge may take up to 4.5 hours. The lithium-ion battery is not user-replaceable, so charging location and off-season storage deserve a check before purchase.

The exact -US page lists a two-year warranty, compared with one year on the NAUTILUS-branded -PC listing. Maytronics says warranty length varies by model and region and advises retaining the serial number and proof of purchase for registration, so confirm the actual seller’s terms rather than assuming a page duration transfers to every offer. A targeted check of the CPSC all-recalls dataset found no product-specific entry for 99994400-US or the associated EON 100 record on October 28, 2026; this is a bounded database check, not a declaration that no safety issue or later notice can exist.

Bottom line for the exact -US configuration

The EON 100 is worth comparing when a cordless 50-foot rating, waterline cleaning and shallow-feature coverage fit the pool, and app scheduling is useful without requiring underwater control. The two-year page warranty is a material difference from the -PC version, while waterline coverage is clearer on the -US listing. The unresolved filter label and package tools remain real drawbacks: verify the filter, Clicker or pickup equipment, seller warranty and model suffix before treating this as a final shortlist choice.