RELEASED 2019.03REASSESSED 2026.08.30

Maytronics

Maytronics Dolphin Proteus DX4

Name: Maytronics Dolphin Proteus DX4
Brand: Maytronics

Two scrubbing brushes on a cable-tethered chassis. Floor, walls and waterline in one pass on a 60 ft anti-tangling swivel cable, with pool length and brush wear setting the limits rather than a battery.

Price$1,099 list priceRetail price not tracked

Autonomy Ladder

Why Level II.

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 AutonomyCopes with everyday clutter and frees itself, shown by independent testing.
IIIConditional AutonomyFinishes whole jobs in familiar spaces; struggles at the edges.
To reach Level IIIMost sessions finish without intervention. Rescue is occasional, not routine.
IIAssisted AutonomyThis robot

Maytronics Dolphin Proteus DX4 runs preset routines on its own, and the owner is its recovery system.

Navigation and control

Scanning coverage pattern; mode selection and weekly timer on the power supply, no app and no map.
Why this level
- The DX4 runs a scanning coverage pattern across floor, walls and waterline, started by hand at the deck-side power supply or by the supply's weekly timer.
- There is no app, no wireless link, no map the owner can inspect and no obstacle avoidance, and range is bounded by the 60 ft cable.
- Cycles run unattended once started, but placement, retrieval and every setting change happen at the machine or the supply, which holds it at Level II (Assisted Autonomy).
Autonomy dimension 38 / 100 · 1 source reviewed
IManual AutomationOne action on command; no independent operation.

How we assign a level →

Behind the classification

Sources we reviewed.

Pending1 source reviewed

Evidence is still being collected for this product.

Sources reviewed

Longitudinal signal2 sourcesReviewed

Robovations dated log for this robot: 3 tracked entries spanning ~15 months.

Specification sources1 sourceReviewed

Pages the published specifications were read from.

maytronics.commaytronics.com

Also monitored, nothing listed yet

Manufacturer documentationReviewed

Spec sheet, cable length, brush replacement intervals, salt-system considerations.

Press & video reviewsReviewed

Retail reviews from Amazon and pool-supply outlets; cable management, brush wear patterns.

Owner reportsOngoing

Reddit r/pools, swimming pool forums; tangling, maintenance frequency, blade longevity.

Firmware release notesReviewed

No firmware history exists to cite for this model. Maytronics' specification lists 'Mobile Application: No' for the DX4, and the record's connectivity array is empty: there is no app, no wireless link and no field update path.

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 Proteus DX4 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
- Widely available through Amazon and pool retailers.
- Setup is straightforward: uncoil the 60 ft cable, set the power supply on the deck on a GFCI-protected outlet without an extension cord, and either start a cycle or set the weekly timer.
- Filter rinsing after cycles and monthly brush inspection are the routine.
- The corded design takes battery replacement out of the ownership cost, and the anti-tangling swivel keeps the cord from knotting as the machine turns.
On the record
- Shipping since March 2019 · 90 months on the market
- No successor announced
- 1 source reviewed
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

64of 100

CapableAt or above 34% of the 436 robots we scoreand 48% of the 64 scored robot pool cleaners

DeficientLimitedCapableStrongExemplary

What moved itpoints gained or lost against a typical robot

Carried by

Support longevity100+3.8
Task completion87+2.4
Routine maintenance75+1.0

Held back by

Software stability37−3.9
Field failure rate52−2.9
Edge-case recovery27−2.5

Capability40% of the score62What it does without you.

Task completion16% of the score87

Evidence

Reaches all three referent surfaces in one pass, climbing the wall and scrubbing the waterline, rated to 50 ft and mains-fed so not bounded by charge, and the power supply's weekly timer can start a cycle without anyone at the deck. Held below the flagship Dolphins because waterline contact comes from the two drive-roller brushes rather than dedicated hardware, with no side brushes and no separate waterline port, and because two-brush debris capacity caps at moderate load by the record's own account.

Coverage and navigation10% of the score52

Evidence

A scanning coverage pattern rather than the random bouncing of the Nautilus CC, which is a real difference in kind. Held below the middle because the record states there is no map the owner can inspect, nothing is retained between cycles, and there is no obstacle avoidance at all. Coverage is re-derived every run with no reporting of any kind, so whether a region was missed is unknowable to the owner.

Edge-case recovery10% of the score27

Evidence

The 60 ft anti-tangling swivel is a genuine design mitigation, removing the cable-knot failure path that the Nautilus CC leaves to the owner to undo by hand. Nothing else here rises above the found-stalled anchor: the record states there is no obstacle avoidance, no wireless link and no status to check, so a machine wedged on a step, a ladder or a main drain sits unreported until someone looks at the pool.

Operating envelope4% of the score76

Evidence

Covers in-ground and above-ground pools to 50 ft, and the brush-driven design is specifically suited to rough textured gunite and concrete where wheel-driven units lose scrubbing pressure. Degrades on heavy leaf load and silt-laden or algae-heavy water, where the record says capacity caps at moderate debris. No Maytronics salinity limit was located, leaving water chemistry unanswered for this referent, though the record reasons soundly that a salt cell belongs to the pool's circulation rather than the cleaner.

Dependability40% of the score59Whether it keeps doing it.

Field failure rate16% of the score52

Evidence

Seven years on Maytronics' corded platform since 2019 with no recall located. The drive motor unit failure mode documented across Dolphin owner forums is repaired only with a complete assembly at roughly $300 to $600, which against an $800 to $1,100 machine is a third to a half its value and only marginally proportionate. Every failure source on this record is unlinked and the press source is explicitly retail review text, which caps this input near 65 regardless; it does not come close.

Software stability14% of the score37

Evidence

There is no software to be stable or unstable. The record is explicit: Maytronics lists Mobile Application as No for the DX4, the connectivity array is empty, and there is no app, no wireless link and no field update path, so no firmware history exists to cite. Scored on what the control system does, a scanning pattern with mode selection and a weekly timer on the power supply, consistent across seven years. It earns nothing for having no cloud to fail.

Support longevity10% of the score100

Evidence

DX Series is named explicitly among the model families the independent Dolphin aftermarket stocks, at InyoPools, Leslie's, PoolWeb, Wild West and EZ Pool, alongside Maytronics' own OEM store. Unusually, both the interval and the price of the one real consumable are published, brushes at 12 months and about $80 a pair, so an owner can cost the machine before buying. Slightly below the flagship Dolphins on a narrower parts list rather than a weaker channel.

Ownership burden20% of the score77What it asks of you.

Routine maintenance12% of the score75

Evidence

The lightest routine among the corded units here. At 18.5 lb the lift is manageable, the anti-tangling swivel removes the untangling chore entirely, the top-load basket rinses without opening the machine, and the power supply's weekly timer means cycles start without a walk to the deck. The standing work is the after-every-cycle lift, drain and rinse, plus monthly brush inspection and an annual brush change.

Consumables8% of the score80

Evidence

The filter basket rinses and reuses with no cartridge program and no subscription, and Maytronics publishes both the interval and the price of the one genuine consumable, brushes at roughly $80 a pair every 12 months, which is more transparency than the category usually offers. Held down because that is a real annual cost against an $800 to $1,100 machine, and owner reports put the interval as short as 8 months under heavy debris load.

middle half of the databaseits medianthis robot

Reported, not scoredneither measures how well the robot works

Five-year cost$1,500

Lower-middle at a $1,099 MSRP, street $800 to $1,100, plus about $400 over five years in annual brush pairs; no battery, no subscription and no app, and the brush cost is one of the few consumable figures published anywhere in the category

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 Proteus DX4 work in your pool?

Describe your pool using the controls. Each choice reads the spec sheet for you, flagging where the Maytronics Dolphin Proteus DX4 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 below the category median, with every figure charted against the category below.

Dimensional drawing

Key specificationsManufacturer-published

Footprint: 15.8 × 17.5 in · 11.4 in tall•
Weight: 18.5 lbs•
Cycle length: 120 minutes•
Max pool length: 50 ft•
Surfaces cleaned: Floor, walls and waterline✓
Power type: Corded✓
Cable length: 60 ft✓

Where it lands · ranked across 75 robot pool cleanersThis robotMedianTypical range

Price$1,099

$299$4,250

Near median

Weight18.5lbs

7.9 lbs46.3 lbs

Near median

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

Official referencesProduct page

OWNERSHIP

Living with it.

Steady performance over four years; cable entanglement is the top user friction point.

Manufacturer has shipped two firmware updates addressing motor stall sensitivity. Owner reports document high reliability on debris detection and brush durability; cable tangling adds operational complexity but not mechanical failure. No major recalls.

Owner effort~75 minhands-on per month

Consumables$140replaceable parts / yr

Reliability trend Stableowner-reported arc

What goes wrong · not yet documented independently

The independent record is still forming. Failure modes are listed once an outside source reports them.

Upkeep routine

Each useEvery cycle

Lift the machine out by the handle, let it drain, and rinse the top-load filter basket with a hose.

Monthly12×/yr

Brush bristle inspection; replace the pair if shedding or wear is visible.

Seasonal4×/yr

Pool winterization; drain the machine and store it and the power supply indoors in freezing regions.

Yearly1×/yr

Main brush pair replacement as the bristles wear down.

Cost over time · past the sticker

PurchaseRunning cost

Year 1

$1,239

Year 3

$1,519

Year 5

$1,799

$1,099 to buy, then about $140 a year for the replaceable parts below. Over three years that is roughly $420 past the sticker price. Excludes electricity and any repairs.

What you replace

BrushMonthly

Replacement cadence from the maintenance schedule; prices shown where the source documents them.

Safety notes

CautionCable entanglement risk.: Coiled cable can jam motor if pulled too taut; keep slack loop poolside.

NoteMotor stall shutoff.: Automatic cutoff on jam is safe; requires manual restart.

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 · AssessmentRecord status: Verified → Provisional
Aug 2026 · AssessmentRobovations Score rescored under v4.2: 61 → 64
Aug 2026 · AssessmentRobovations Score rescored under v4.0: 65 → 61
Jul 2026 · AssessmentRobovations Score revised 62 → 65
Jul 2026 · AssessmentRobovations Score recorded at 62 of 100

Editorial comparisons

How Maytronics Dolphin Proteus DX4 compares.

All comparisons →

Ownership burden

Corded Dolphin repair costs and longevity: which model lasts longest?

Maytronics Dolphin Proteus DX4 + 3 more

Read comparison

Common questions

What people actually ask.

5 answered

OperationDoes the DX4 reach waterline edges or just the pool floor?

It reaches the waterline. The DX4 climbs the wall and scrubs with two active brushes on the drive rollers; it has no side brushes and no separate waterline port. Maytronics rates the machine by pool length, up to 50 ft.

OperationDoes the DX4 cable tangle during a cycle?

The DX4 runs on a 60 ft anti-tangling swivel cable, listed in Maytronics’ specification as ‘Anti Tangling Swivel: Yes’. The swivel lets the machine turn through full circles without winding the cord into a knot, so untangling is not part of the routine. Uncoil the cable fully before the first cycle and let it drain when the machine comes out.

OwnershipHow long do the two main brushes actually last before replacement?

Manufacturer specs list 12 months under standard use; owner reports range 8–14 months depending on debris load and weekly cleaning discipline. Brushes cost roughly $80 per pair.

OperationCan it handle a saltwater chlorine generator pool?

The salt cell in a saltwater pool belongs to the pool’s circulation system, not to the cleaner. The DX4 has no electrolytic cell and no plumbing connection of any kind, so nothing on the machine is replaced on a cell’s schedule. No Maytronics salinity limit for the DX4 was located for this assessment; the routine is the same filter rinse and brush check.

OperationIs there a significant difference between DX4 and the newer DX5 model?

Not verified feature by feature for this record. What is documented for the DX4 is that it carries no mobile application and no wireless connectivity: cycles start at the power supply, by hand or on the weekly timer. Dolphin models that do offer app control connect over Bluetooth and home Wi-Fi through MyDolphin Plus; no Dolphin pool robot uses a cellular link.

Cite / Embed

Reference the Maytronics Dolphin Proteus DX4 classification.

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Citation

Robovations. "Maytronics Dolphin Proteus DX4: Autonomy Level II (Assisted Autonomy)." Autonomy Ladder™, assessed August 2026. https://robovations.com/robots/maytronics-dolphin-proteus-dx4/

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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 Proteus DX4 and Maytronics Dolphin S200 side by side: autonomy level, Robovations Score, readiness, and price. Classification, not a verdict.

See the full comparison

Or compare with Polaris 9450 Sport, Maytronics Dolphin Nautilus CC Pro, Maytronics Dolphin Nautilus CC Plus.

For browsers

See every Level II.

Every robot we’ve classified at assisted 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 Proteus DX4

Will the Maytronics Dolphin Proteus DX4 work in your pool?

The full spec sheet.

Living with it.

How the assessment has moved.

How Maytronics Dolphin Proteus DX4 compares.

Corded Dolphin repair costs and longevity: which model lasts longest?

What people actually ask.

Other robot pool cleaners we have classified.

Maytronics Dolphin Nautilus CC Pro

Maytronics Dolphin Nautilus Titan

Ecovacs Ultramarine P1

Wybot C2

Reference the Maytronics Dolphin Proteus DX4 classification.

Three ways to keep going.

Get the next reassessment.

Compare with a peer.

See every Level II.