RELEASED 2023.04REASSESSED 2026.08.30

Maytronics

Maytronics Dolphin Liberty 300

Name: Maytronics Dolphin Liberty 300
Brand: Maytronics

Cordless cleaner targeting mid-sized pools with gyroscope-guided systematic coverage. Eliminates cable swivel maintenance; magnetic charging adds simplicity. Level III classification rests on documented systematic navigation behavior; owner reports on reliability and consumable intervals remain thin.

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 Liberty 300 finishes whole jobs in a space it already knows, and still needs a person at the edges.

Navigation and control
CleverClean scanning across floor, walls and waterline; no stored map, no app control
Why this level
- The Liberty 300 runs preset cleaning cycles selected with buttons on the unit itself.
- Maytronics lists no Wi-Fi, Bluetooth or app for this SKU, and there is no stored map.
- Coverage comes from CleverClean scanning rather than a route the machine remembers between cycles.
- It also does not dock.
- Charging means lifting the unit out of the water and attaching the magnetic charger by hand, and the retrieval aid is sound-activated, bringing the robot to the wall so the owner can reach it.
- Cordless operation removes the cable, not the operator.
Autonomy dimension 64 / 100 · Assessment under way
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.

PendingAssessment under way

Evidence is still being collected for this product.

Sources reviewed

Manufacturer documentation3 sourcesPending

Maytronics Liberty 300 product announcement, release notes, and specification disclosure.

Longitudinal signal2 sourcesReviewed

Robovations dated log for this robot: 3 tracked entries spanning ~23 months.

Firmware release notes1 sourceOngoing

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

Maytronics Dolphin supportmaytronics.com

How we evaluate evidence →

Human Readiness

Ready Now.

One question: what does buying this robot today walk you into? The state is computed from the record, and recomputed daily.

Ready NowThis robot

Maytronics Dolphin Liberty 300 is on sale, assessed, and nothing on its record argues for waiting.
How this was derived
- Shipping past the first-90-day ownership window with a published assessment, no documented issues on record, and no announced successor.
Notes on the record
- Maytronics lists the Liberty 300 at $1,249 through standard retail channels.
- Cordless architecture removes the poolside power supply and cable management, in exchange for lifting the unit out of the water to charge on a magnetic contact.
- Provisional status reflects thin longitudinal owner data on battery service life and a documented conflict in published cycle length.
On the record
- Shipping since April 2023 · 41 months on the market
- Retail listings on file: Amazon
- No successor announced
- Assessment under way
What would move it
A documented problem, an announced successor, or a withdrawn listing moves it out; the rating recomputes daily.
New to MarketOn sale under 90 days; the ownership record is still forming.
WaitA successor is announced and has not shipped; re-read the decision when it arrives.
Known IssuesDocumented problems stand on the record; read the case before buying.

How we assess readiness →

Robovations Score

How this number was reached

57of 100

CapableAt or above 20% of the 382 robots we scoreand 27% of the 59 scored robot pool cleaners

DeficientLimitedCapableStrongExemplary

What moved itpoints gained or lost against a typical robot

Carried by

Support longevity82+1.9
Routine maintenance72+0.8

Held back by

Software stability34−4.3
Coverage and navigation30−4.0
Field failure rate48−3.5

Capability40% of the score55What it does without you.

Task completion16% of the score72

Evidence

Maytronics lists floor, wall and waterline coverage, so the machine is built for the whole work area, and sound-activated retrieval brings it to the pool wall for the lift, which satisfies the referent's retrieval-point condition. Cut substantially by an independent contradiction of the vendor: Robotic Reviews reports 1.5 hours against Maytronics' listed 2.5, and the record states outright that which figure holds decides whether one charge covers a full floor-plus-walls pass. It does not resume on its own; it is lifted out, charged and put back.

Coverage and navigation10% of the score30

Evidence

forumpiscine thread "Robot dolphin liberty 300": owner jioperttr, after about ten floor-only runs on a machine bought in June, reports "one third of the pool is cleaned after the 1h30 cycle" and "there is no coherence in its movements," describing it stopping mid-pool, turning, advancing a meter, stopping and reversing. A second poster in the same thread says the robot is meant to run "an algorithm to work in a star pattern, but I watched it for long stretches and never understood what it was doing."

Edge-case recovery10% of the score45

Evidence

Same thread, jioperttr: "it ends up wedging itself against a wall where it will do a dozen back-and-forths before taking, by some miracle, another direction." It frees itself without a rescue and does not damage anything, but there is no detection, no report and no purposeful maneuver, and the owner had to write to Dolphin support to learn whether his unit was defective.

Operating envelope4% of the score70

Evidence

Maytronics lists both in-ground and above-ground installations, which is a genuine advantage. Against that, coverage per charge is bounded by a battery whose runtime is itself in dispute between the vendor and an independent tester, heavy leaf load constrains the run on both battery and basket capacity, and the record flags sustained wall-climb performance across gunite, plaster and fiberglass as requiring owner verification rather than established.

Dependability40% of the score52Whether it keeps doing it.

Field failure rate16% of the score48

Evidence

Three years since April 2023 with no recall, but the independent evidence base is close to empty: every linked source is either a Maytronics store page or Robovations' own tracker, leaving one cited runtime figure as the outside observation. On this cordless SKU the drive and pump motors are sealed service-center assemblies rather than the owner-orderable motor units of the corded Dolphins, and the record states battery service life is undocumented with replacement cost at three to five years unknown. That is a job-stopping mode at unknown cost inside expected service life.

Software stability14% of the score34

Evidence

There is no app, no connectivity and no update channel on this SKU, so nothing regresses and nothing gets fixed. Scored on what the control system does: preset cycles chosen with buttons on the unit plus CleverClean scanning. The only independent observation of that system's behavior contradicts the vendor's published cycle length. It earns nothing for having no software to fail.

Support longevity10% of the score82

Evidence

Maytronics' dealer and parts network covers filter panels and brushes for this unit as catalog items. Discounted heavily from the corded Dolphin position for reasons specific to this platform: the drive and pump motors are sealed units the record says are a service-center matter rather than an owner procedure, the battery carries no published service life or replacement price, and the deep third-party aftermarket that stocks corded Dolphin drive motors does not extend to the cordless line.

Ownership burden20% of the score72What it asks of you.

Routine maintenance12% of the score72

Evidence

At 17.9 lb this is the lightest full-surface cleaner here, sound-activated retrieval brings it to the wall before the lift, and there is no cable to inspect or coil, which is the standing chore on every corded unit. Offsetting that: no dock at all, so the unit comes out of the water and has a magnetic charger attached by hand between every cycle, filter panels rinse after every cycle, and the pack must be stored charged and topped up through the off-season.

Consumables8% of the score71

Evidence

No purchased cartridge exists. The Combine Filter Kit's interchangeable fine and ultra-fine panels lift out and rinse with no published replacement interval, which is genuinely low recurring spend. Held well below the corded Dolphins because the record explicitly flags the battery as an undocumented replacement at three to five years with unknown cost, so the largest single item in this machine's running cost cannot be quantified by a buyer in advance.

middle half of the databaseits medianthis robot

Reported, not scoredneither measures how well the robot works

Five-year cost$1,650

mid-market at $1,249 with no cartridge program and no subscription, but the five-year figure is soft: it assumes roughly $300 for a battery replacement inside the window, a cost Maytronics does not publish and the record flags as unknown

Data postureLocal

Core function needs no account and no network.

What leaves the homeNot documented

Read the full methodology →

FIT CHECK

Will the Maytronics Dolphin Liberty 300 work in your pool?

Describe your pool using the controls. Each choice reads the spec sheet for you, flagging where the Maytronics Dolphin Liberty 300 is built for your space and where it isn’t.

Pool type

Pool size

Debris load

Coverage you want

See every pool cleaner suited to these conditions

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: 17.9 lbs✓

Where it lands · ranked across 69 robot pool cleanersThis robotMedianTypical range

Runtime150min

90 min1,800 min

Bottom of range

Price$1,249

$299$4,250

Near median

Weight17.9lbs

7.9 lbs46.3 lbs

Near median

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

Official referencesOwner manual Manufacturer support Product page

OWNERSHIP

Living with it.

Limited market data; cordless design eliminates cable-swivel failure points but battery longevity unproven.

Under 18 months in market. Cordless architecture removes one major tethered-model failure mode (cable swivel wear). Battery durability and dock contact wear require longer-term owner reporting. No documented recalls or firmware regressions.

Owner effort~60 minhands-on per month

Reliability trendUnprovenowner-reported arc

What goes wrong · 4 documented · 0 self-recover

Common

Filter cartridge cloggingReduced suction and coverage efficiency

Owner fixWeekly cartridge rinse; replacement every 1-2 seasons depending on debris load

Occasional

Battery capacity lossReduced runtime per charge over time

Owner fixBattery replacement at 3-5 years typical for cordless pool cleaners

Occasional

Magnetic dock contact corrosionCharging intermittency or failure

Owner fixDock contact cleaning; replacement dock if corrosion spreads

Occasional

Drive motor bearing wearLoss of wall-climbing traction

Owner fixMotor rebuild or replacement, typically at 3-5 years with heavy use

Step-by-step fixesWon’t Climb Walls or Move?Won’t Turn On or Charge?Brushes or Tracks Not Scrubbing?All robot pool cleaner guides

Upkeep routine

Each useEvery cycle

Lift the filter panels out of the top-access basket and rinse them with fresh water; check the brushes for wrapped debris.

Monthly12×/yr

Wipe the magnetic charging contacts on the unit and on the charger so they seat cleanly.

Seasonal4×/yr

Check the drive tracks and brushes for wear. The drive and pump motors are sealed units; noise or vibration is a service-center matter, not an owner procedure. · Store the unit charged and indoors, and top the battery up during the off-season. Storing a lithium pack discharged damages it.

Yearly1×/yr

Inspect the filter panels for tears and the charger lead for damage.

Cost over time · past the sticker

$1,249 to buy. Ongoing running cost for this model hasn’t been assessed yet.

Safety notes

CautionPinch hazard at motor intake: Keep hands and long hair away during operation. Do not reach into filter housing while powered.

NoteBattery charging safety: Ensure magnetic dock is on a GFCI-protected outlet. Inspect dock for corrosion before each charge cycle.

RECORD

How the assessment has moved.

Every announcement, release and reassessment behind the current classification.

Coming soon

Just launched

Active updates

Settled

Discontinued

Aug 2026 · AssessmentRecord status: Provisional → Pending
Aug 2026 · AssessmentRobovations Score recorded at 57 of 100
Aug 2026 · AssessmentRobovations Score withheld: too little independent evidence
Aug 2026 · AssessmentRobovations Score rescored under v4.2: 56 → 58
Aug 2026 · AssessmentRobovations Score rescored under v4.0: 70 → 56
Jul 2026 · AssessmentRobovations Score revised 66 → 70
Jul 2026 · AssessmentRobovations Score recorded at 66 of 100
Feb 2025 · NewsDolphin Liberty 300 Expands to Pool Specialty Retail Channels Ahead of 2025 Season
Apr 2023 · ReleaseDolphin Liberty 300 Launches Commercially as Maytronics First Cordless Smart-Mapping Pool Cleaner

Editorial comparisons

How Maytronics Dolphin Liberty 300 compares.

All comparisons →

Goal-based

Robot pool cleaners for above-ground and small pools: weight, climb, storage

Maytronics Dolphin Liberty 400 · Maytronics Dolphin Nautilus EON 100 · Maytronics Dolphin Liberty 300

Read comparison

Common questions

What people actually ask.

5 answered

OperationDoes the Dolphin Liberty 300 handle waterline algae and calcium buildup?

Maytronics lists waterline coverage for the Liberty 300. Algae prevention depends on pool chemistry rather than the cleaner, and there is no published finding on calcium removal. Filtration is a top-access basket with fine and ultra-fine panels, sized for debris rather than chemical treatment.

OperationHow long does a full charge last, and can it complete one pool cycle in a single pass?

Published sources disagree. Maytronics lists a 2.5 hour cleaning cycle for the Liberty 300; Robotic Reviews reports 1.5 hours in use. Whether one charge covers a full floor-plus-walls pass therefore depends on which figure holds for a given pool. The machine does not resume on its own afterward: it has to be lifted out, charged and put back.

OwnershipWhat is the replacement cost for filter cartridges, and how often do they need cleaning?

There is no purchased cartridge. Maytronics documents the filtration as a Combine Filter Kit with interchangeable fine and ultra-fine panels in an oversized top-access basket; the panels lift out and rinse with fresh water after cycles. Maytronics publishes no replacement interval or price for them.

OwnershipDoes the Liberty 300 return to a dock to charge?

No. There is no dock and no self-docking. The unit is lifted out of the water to charge, and the charger connects by magnetic contact attached by hand. Maytronics retrieval aid is sound-activated: the robot comes to the pool wall so the owner can lift it out.

OperationCan the Liberty 300 climb pool walls and reach the waterline effectively?

Manufacturer documentation lists wall-climbing capability. Waterline reach and sustained climb performance in different pool materials (gunite, plaster, fiberglass) require owner-report verification. This varies significantly across pool conditions.

Availability

Where it's sold

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

Amazon Check price & availability

Cite / Embed

Reference the Maytronics Dolphin Liberty 300 classification.

Embed the Autonomy Ladder™ mark or copy the citation. The mark is served from this record, so a reassessment updates it on your page automatically.

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Citation

Robovations. "Maytronics Dolphin Liberty 300: Autonomy Level III (Conditional Autonomy)." Autonomy Ladder™, assessed August 2026. https://robovations.com/robots/maytronics-dolphin-liberty-300/

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A classification, not an endorsement. It may not appear beside language implying Robovations recommends, rates, or approves the product.

Where to next

Three ways to keep going.

For evaluators

Compare with a peer.

See the Maytronics Dolphin Liberty 300 and Polaris 9650iQ Sport side by side: autonomy level, Robovations Score, readiness, and price. Classification, not a verdict.

See the full comparison

Or compare with Maytronics Dolphin EON 120d, Aiper Scuba S1 Pro, Maytronics Dolphin Oasis Z5i.

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 Liberty 300

Will the Maytronics Dolphin Liberty 300 work in your pool?

The full spec sheet.

Living with it.

How the assessment has moved.

How Maytronics Dolphin Liberty 300 compares.

Robot pool cleaners for above-ground and small pools: weight, climb, storage

What people actually ask.