RELEASED 2026.02REASSESSED 2026.08.07

Maytronics

Maytronics Dolphin EON 120d

Name: Maytronics Dolphin EON 120d
Brand: Maytronics

Cordless robotic pool cleaner built around DebrisLock, an automatic in-water backwash that trips when sensors detect the filter clogging and seals the dislodged debris in a separate compartment. Maytronics documents coverage of floor, walls and waterline, steps, sun ledge, corners and safety ledge, with operation in water as shallow as 8 inches, and rates the machine at up to 4 to 4.5 hours per charge with selectable 1.5, 2 and 2.5 hour cycles. The line launched in January 2026, so the field record is short.

Autonomy Ladder

Why Level III.

One five-rung scale, every category, from acting only on command to working unsupervised anywhere.

VGeneralized AutonomyAny task, any setting. No consumer robot has reached it.
IVEnvironmental AutonomyHandles new obstacles and re-plans in real time; rare in consumer products.
To reach Level IVSustained operation across sessions, including layouts and conditions it has not met before.
IIIConditional AutonomyThis robot

Maytronics Dolphin EON 120d finishes whole jobs in a space it already knows, and still needs a person at the edges.

Navigation and control
Smart mapping with autonomous floor/wall coverage
Why this level
- Smart mapping with cordless operation allows the Dolphin to navigate the pool floor and execute multi-cycle cleaning without operator intervention or tether dependence.
- Manufacturer specs document autonomous position-tracking.
- End-to-end cycle completion is independent of human teleoperator control, placing it at Conditional Autonomy.
Autonomy dimension 68 / 100 · 5 sources reviewed
IIAssisted AutonomyRuns preset routines; stalls at anything new.
IManual AutomationOne action on command; no independent operation.

How we assign a level →

Behind the classification

Sources we reviewed.

Verified5 sources reviewed

Sufficient public evidence across source types to publish a non-provisional classification.

Sources reviewed

Manufacturer documentation3 sourcesReviewed

CES 2026 Dolphin EON product launch; DebrisLock backwash system, smart mapping, cordless operation specs.

Firmware release notes1 sourceOngoing

Maytronics publishes firmware releases and software notes through its support portal; reviewed on an ongoing basis.

Maytronics Dolphin supportmaytronics.com

Specification sources2 sourcesReviewed

Pages the published specifications were read from.

Also monitored, nothing listed yet

Press & video reviewsPending

CES 2026 coverage of cordless pool-cleaner launch; autonomy and DebrisLock feature reporting.

Longitudinal signalPending

Owner reports and in-field reliability tracking post-Feb 2026 launch; battery performance and maintenance cadence.

How we evaluate evidence →

Robovations Score

How this number was reached

71of 100

StrongAt or above 70% of the 355 robots we scoreand 85% of the 53 scored robot pool cleaners

DeficientLimitedCapableStrongExemplary

Measured on 7 of the 9 inputs14% not counted

Our assessment did not establish an independent source for edge-case recovery, operating envelope on this machine, so those inputs are left out of the score rather than guessed at, and the rest re-weighted to fill the space. A gap in what we have been able to verify is not evidence against the robot. Where it reaches 30% of the rubric we publish no number at all.

What moved itpoints gained or lost against a typical robot

Carried by

Routine maintenance84+1.9
Support longevity79+1.6

Held back by

Field failure rate56−2.2

Capability40% of the score73What it does without you.

Task completion16% of the score75

Evidence

PCWorld's tester finished each cycle by hand: the robot has to be retrieved with a pole or the shake-activated "clicker," and emptying it was "a huge pain" that meant "painstakingly pick dozens of leaves out of the basket by hand, one by one, and even then the basket never felt fully clean," which PCWorld calls the machine's "fatal flaw." The cleaning cycle itself runs to the end unattended, so a human closes the loop every run rather than during it.

Coverage and navigation10% of the score70

Evidence

PCWorld measured a "95 percent cleaning rate" and found the robot "cleaned all around the pool, but it left a few leaves on steps and, especially, wasn't great in the corners, where debris was almost always left behind," adding that "the robot did hiccup in the same few spots consistently." Systematic coverage of the pool with a small set of regions missed the same way on every run.

Edge-case recoverynot countedno source verified50

Evidence

Self-recovers from a documented category failure mode without a human: sensors detect the filter clogging, DebrisLock backwashes in the water, and the cycle resumes. A loading filter stalls or degrades every other cleaner scored here. Held well below the top because it addresses that one mode only. No obstacle sensing, no entrapment recovery and no stall reporting appear anywhere, and a wedged cordless unit has no cable to haul it back by.

Operating envelopenot countedno source verified100

Evidence

Unusually broad for this category and specifically aimed at the conditions that constrain everything else here: in-ground and above-ground, kidney and resort-style geometry, tanning ledges, benches, steps and corners, water down to 8 inches, and heavy leaf load handled by backwashing rather than by pre-skimming. Three real limits: the run is bounded by the pack at 1.5, 2 or 2.5 hours with a lift-out to recharge, heavy leaf fall shortens the filter interval anyway, and the pack needs stored-charged discipline through the off-season.

Dependability40% of the score65Whether it keeps doing it.

Field failure rate16% of the score56

Evidence

Six months on the market since the February 2026 launch, so the under-12-month cap at 70 binds, and the record says outright that battery longevity and long-run reliability data for this generation do not exist. Held mid rather than at the evidence floor on two grounds: Maytronics carries no CPSC recall in a category where its main cordless competitor carries two for overheating or fire, and early press testing did put hands on a shipping unit. Held well below the cap because this is a new cordless architecture for the maker with no pack service-life record at all.

Software stability14% of the score65

Evidence

The ordinary state. Maytronics runs a public support portal publishing firmware releases and software notes, so an update channel exists and is inspectable, and this is a Wi-Fi model that receives them. It cannot reach the twelve-month owner anchor because the machine is six months old, and no independent record of any update's effect exists. Neither stability nor instability is asserted.

Support longevity10% of the score79

Evidence

Maytronics runs the deepest parts and dealer channel in this category, brushes are replaced on condition as catalog items, and the machine ships with its caddy and an IP55 charger rather than as accessories. Marked well down from the corded Dolphins for one reason that matters most on a cordless machine: this is a first-generation cordless line, no warranty term appears anywhere in the record, and there is no published battery replacement price or service path for the part that will decide its service life.

Ownership burden20% of the score78What it asks of you.

Routine maintenance12% of the score84

Evidence

DebrisLock moves filter service from a per-cycle job to a weekly one, and that is a mechanism doing the work rather than an absence of work, which is the second lightest routine of any pool cleaner scored here. The rest is a monthly brush check and a deep rinse every 3 to 6 months. Deducted for a 24.3 lb lift out to the caddy for every charge, off-season pack discipline, and early press testing finding a leaf-packed filter awkward to clear by hand, so the work is reduced rather than removed.

Consumables8% of the score69

Evidence

Nothing is on a schedule: the filter is rinsed and reused with no published replacement interval, and brushes are replaced when the bristles splay rather than on a calendar, both through a wide catalog. The deduction is the pack. Maytronics publishes no replacement price and no service path for it, so on a $1,199 cordless machine the single most expensive wear item is the one the owner cannot plan for.

middle half of the databaseits medianthis robot

Reported, not scoredneither measures how well the robot works

Five-year cost$1,600

mid to upper for robotic pool cleaners at $1,199, plus an estimated $400 over five years in brushes, filter parts and pack service, none of which Maytronics prices for this line; no subscription

Data postureCloud-linked

Account required. Maps and telemetry leave the home; core function survives an outage.

What leaves the homeNot documented

Read the full methodology →

FIT CHECK

Will the Maytronics Dolphin EON 120d work in your pool?

Describe your pool using the controls. Each choice reads the spec sheet for you, flagging where the Maytronics Dolphin EON 120d is built for your space and where it isn’t.

Pool type

Pool size

Debris load

Coverage you want

A classification of fit for the conditions you set, not a recommendation. Verdicts describe engineering design intent, not test results.

SPECIFICATION

The full spec sheet.

Priced near the category median, with every figure charted against the category below.

Dimensions not publishedDimensional drawing

Key specificationsManufacturer-published

Weight: 24.3 lbs✓
Wi-Fi: Supported✓

Where it lands · ranked across 65 robot pool cleanersThis robotMedianTypical range

Runtime120min

90 min1,800 min

Bottom of range

Price$1,199

$299$4,250

Near median

Weight24.3lbs

7.9 lbs37 lbs

Near median

Position shows where the figure sits across the tracked category, not a quality judgment.

Official referencesProduct page

OWNERSHIP

Living with it.

Cordless debut with smart mapping; owner field data absent.

Manufacturer reports specify DebrisLock backwash and autonomous coverage claims. No published firmware changelog, recall notices, or longitudinal owner reports available to assess in-service reliability or failure patterns.

Owner effort~3 hrshands-on per month

ConsumablesNonereplaceable parts / yr

Reliability trendUnprovenowner-reported arc

What goes wrong · 3 documented · 0 self-recover

Occasional

DebrisLock backwash cloggingReduced pressure, suction loss, incomplete coverage.

Owner fixManual backwash; inspect valve seals monthly.

Occasional

Smart-map calibration driftMissed floor sections or repeated coverage in shallow areas.

Owner fixRe-dock and allow firmware refresh; reprogram if drift persists.

Occasional

Battery degradation under winterizationReduced charge capacity or failed dock recognition after off-season storage.

Owner fixFollow battery-care protocol; charge dock before seasonal startup.

Step-by-step fixesWon’t Turn On or Charge?Brushes or Tracks Not Scrubbing?Cable Floating, Kinking, or Coiling?All robot pool cleaner guides

Upkeep routine

Weekly52×/yr

Lift the robot out, open the filter compartment, empty it and rinse with a hose. Maytronics states DebrisLock's in-water backwash moves this from a daily job to a weekly one, though heavy leaf fall shortens the interval.

Monthly12×/yr

Brush wear check; replace bristles if splayed.

Seasonal4×/yr

Deep rinse the filter assembly. · Store the battery charged, not drained, and top it up periodically through the off-season; keep the robot and charger in a dry location.

Cost over time · past the sticker

$1,199 to buy, with no regularly replaced parts. The purchase price is effectively the full cost of ownership.

Safety notes

NoteCordless dock power exposure: Outdoor dock requires GFCI protection and weatherproof enclosure.

NoteDeep-water entanglement risk: Autonomous navigation may exceed operator depth awareness in deep ends.

RECORD

How the assessment has moved.

Every announcement, release and reassessment behind the current classification.

Coming soon

Just launched

Active updates

Settled

Discontinued

Jan 2026 · AnnouncementMaytronics unveils Dolphin EON 120d cordless pool cleaner at CES 2026
Feb 2026 · ReleaseDolphin EON 120d reaches retail at $1,199 after CES 2026 debut
Jul 2026 · AssessmentRobovations Score recorded at 56 of 100
Jul 2026 · AssessmentRobovations Score revised 56 → 65
Aug 2026 · AssessmentRobovations Score rescored under v4.0: 65 → 71
Aug 2026 · AssessmentRobovations Score rescored under v4.2: 71 → 74
Aug 2026 · AssessmentRobovations Score revised 74 → 71
Aug 2026 · AssessmentRecord status: Provisional → Verified

Editorial comparisons

Common questions

What people actually ask.

5 answered

OperationDoes the Dolphin EON 120d work in above-ground pools?

Yes. Maytronics lists the pool type for the EON 120d as in ground and above ground. The robot is cordless and self-contained, so it does not depend on anything in the pool’s plumbing or on a fixed installation.

OwnershipHow often do I clean the DebrisLock filter?

DebrisLock backwashes itself. Sensors detect a clogging filter and trigger the backwash while the robot is still in the water, sealing the dislodged debris in a separate compartment. Maytronics states this moves filter emptying from a daily job to a weekly one compared with other robotic cleaners. Heavy leaf fall shortens that interval.

OperationWhat is the runtime on a single charge?

Maytronics states up to 4 to 4.5 hours. Cleaning cycles are selectable at 1.5, 2 and 2.5 hours, with 2 hours the default, and an UltraRun eco mode is rated at up to 2.5 weeks of cleaning per charge. PCWorld reports a 9600 mAh cell.

OperationIs there a dock, and does anything need to be plumbed or wired at the pool?

No. The EON 120d is cordless and ships with a caddy and a separate IP55 charger. The robot is lifted out of the pool and charged off-pool. There is no in-pool dock, no power connection at the water and no plumbing.

OperationWhat does the robot cover besides the floor?

Maytronics documents floor, walls and waterline, steps, sun ledge, corners and safety ledge. The EON line is rated to work in water as shallow as 8 inches, which is what puts tanning ledges, benches and steps inside its range.

Availability

Where it's sold

We may earn commission from qualifying purchases. This does not influence classification.

Some sellers strike through a “was” price of $1,600, above the $1,199 manufacturer list — a discount measured off that is not a real saving.

Amazon Checked Aug 11, 2026 $1,199In stock

Cite / Embed

Reference the Maytronics Dolphin EON 120d classification.

Embed the Autonomy Ladder™ mark or copy the citation. The mark is served from this record rather than saved as a file, so it always shows the level we currently hold. If we reassess, it updates on your page by itself.

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Citation

Robovations. "Maytronics Dolphin EON 120d: Autonomy Level III (Conditional Autonomy)." Autonomy Ladder™, assessed August 2026. https://robovations.com/robots/maytronics-dolphin-eon-120d/

Where to next

Three ways to keep going.

For evaluators

Compare with a peer.

See the Maytronics Dolphin EON 120d and Aiper Scuba S1 Pro side by side: autonomy level, Robovations Score, readiness, and price. Classification, not a verdict.

See the full comparison

Or compare with Maytronics Dolphin Liberty 300, Polaris 9650iQ Sport, Pentair Prowler 930W.

For browsers

See every Level III.

Every robot we’ve classified at conditional autonomy. Sorted by readiness, score, and price. Filter by category, manufacturer, or release date.

Browse the database

Updated weekly with new entries and reclassifications.

Maytronics Dolphin EON 120d

Will the Maytronics Dolphin EON 120d work in your pool?

The full spec sheet.

Living with it.

How the assessment has moved.

How Maytronics Dolphin EON 120d compares.

Robot pool cleaner filters: backwash valve or cartridge?

Cordless pool robots for large pools: does the battery last the whole job?

Cordless pool robots over five years: battery degradation as the hidden cost

What people actually ask.

Other robot pool cleaners we have classified.

Degrii Zima Lite

Seauto SAT40

Dreame Z1 Pro

Polaris VRX iQ+

Where it's sold

Reference the Maytronics Dolphin EON 120d classification.

Three ways to keep going.

Get the next reassessment.

Compare with a peer.

See every Level III.