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Robovations™
Robot Autonomy, Classified
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Comparison · 2 robots

Maytronics Dolphin Liberty 400 · Polaris EPIC 8642 iQ

All robot pool cleaners. Every measure below is plotted against the full class, so a difference can be read against how much the class itself varies.

  1. Maytronics Dolphin Liberty 400
  2. Polaris EPIC 8642 iQ

Up to three

01 Classification

What each one does on its own.

The Autonomy Ladder is the same five rungs for every robot on the site. A rung describes the conditions a robot handles without you, not how good it is.

V
Generalized
Any task, any setting
IV
Environmental
Handles new obstacles without help
III
Conditional
Finishes familiar jobs on its own
Maytronics Dolphin Liberty 400Polaris EPIC 8642 iQ
II
Assisted
Runs preset routines, needs rescue
I
Manual
One action, on command
02 Assessment

Where they actually differ.

The Robovations Score is nine inputs across three pillars, each weighted as shown and each scored so that more is better. A robot can lead on one and trail on another, which is the point of showing them apart. Cost of ownership and data handling are reported on each robot's own page and are never averaged into the score.

Capability

Task completion16% of score
Does it finish the job it is sold to do, unattended
  • Maytronics Dolphin Liberty 40081
  • Polaris EPIC 8642 iQ75
18median 72 across 433 scored robots100
Coverage and navigation10% of score
Does it work the whole area, and hold that between runs
  • Maytronics Dolphin Liberty 40067
  • Polaris EPIC 8642 iQ60
0median 70 across 421 scored robots100
Edge-case recovery10% of score
Does it recover from the failures its category presents
  • Maytronics Dolphin Liberty 40040
  • Polaris EPIC 8642 iQ45
18median 52 across 320 scored robots100
Operating envelope4% of score
How far conditions can vary before performance drops
  • Maytronics Dolphin Liberty 40056
  • Polaris EPIC 8642 iQ50
28median 68 across 397 scored robots100

Dependability

Field failure rate16% of score
Documented hardware failures per owner-year
  • Maytronics Dolphin Liberty 40046
  • Polaris EPIC 8642 iQ73
6median 70 across 359 scored robots100
Software stability14% of score
Whether updates fix more than they break
  • Maytronics Dolphin Liberty 40065
  • Polaris EPIC 8642 iQ65
15median 65 across 342 scored robots100
Support longevity10% of score
Committed parts, service and updates, with dates
  • Maytronics Dolphin Liberty 40088
  • Polaris EPIC 8642 iQ82
0median 62 across 429 scored robots100

Ownership burden

Routine maintenance12% of score
Hands-on time it asks for in normal operation
  • Maytronics Dolphin Liberty 40078
  • Polaris EPIC 8642 iQ56
22median 67 across 434 scored robots100
Consumables8% of score
Parts that must be bought to keep it working
  • Maytronics Dolphin Liberty 40069
  • Polaris EPIC 8642 iQ43
8median 69 across 434 scored robots100
03 Measured against the class

How far apart is a long way?

A number only means something next to the spread it sits in. Each track below is the real range across every classified robot in the class, with the median marked.

Price69 with a published figure
  • Maytronics Dolphin Liberty 400$1,429
  • Polaris EPIC 8642 iQ$1,499
$299median $1,249$4,250

Not compared, because fewer than two of these robots carry a published figure: Suction, Runtime, Charge time, Noise, Weight, Height.

04 Ownership

What the numbers leave out.

The trade-off

What each design gives up to be good at what it is good at.

Maytronics Dolphin Liberty 400

Cordless operation trades away the uninterrupted runtime of a tethered machine: Maytronics rates the cycle at up to 2.5 hours per charge, and the sealed battery cannot be exchanged for a fresh one to extend it.

Scheduled app operation removes the manual trigger but still requires hand placement: the owner lowers the machine in and lifts it out, with Click-Up bringing it to the waterline for retrieval.

Polaris EPIC 8642 iQ

The iAquaLink app is real convenience, but corded operation is tethered convenience, cable management creates logistics that offset the app’s hands-off promise.

Who each one is wrong for

Stated by the record itself. A robot being wrong for a household is a fact about fit, not a fault.

Maytronics Dolphin Liberty 400
Pools longer than the 33 ft rating
Maytronics rates the Liberty 400 for pools up to 33 ft. Beyond that, single-cycle coverage sits outside the stated range, and the sealed battery cannot be exchanged to extend the session.
High-debris environments or complex pool geometry
Obstacle detection is not documented. Pools with islands, spa jets, irregular edges or heavy leaf fall are likelier to need a second cycle or hand skimming.
Owners expecting the machine to put itself away
There is no return-to-dock. Click-Up brings the Liberty 400 to the waterline on command, but a person lifts it out and puts it on charge at the end of every cycle.
Polaris EPIC 8642 iQ
Above-ground pools and small in-ground pools.
Polaris rates the EPIC 8642 iQ for in-ground pools up to 50 feet, and the 60 foot cable, control box and transport caddy are sized for that installation. On a compact pool the handling routine is the same as on a large one, and that routine is most of the ownership effort.
Owners preferring cordless or minimal cable management.
The 60 foot cable is not optional on this model. It runs from the cleaner to a poolside control box, the swivel reduces tangling rather than removing the cord from the routine, and the cleaner and caddy need storage between uses. As with any mains-fed cleaner, it comes out of the pool before anyone swims.
Environments with heavy brush or concrete surface damage.
Brush wear on rough surfaces accelerates; brush replacement intervals will increase and consumable costs rise.

What stays your job

The upkeep ownership hands back to you, whatever the autonomy level says.

Maytronics Dolphin Liberty 400
  • After every use: Rinse the top-access cartridge with a hose, which is the filter procedure Maytronics documents.
  • Weekly (seasonal): Inspect the cartridge for compaction; the Combine Filter Kit cartridges are interchangeable, including an ultra-fine option for finer debris.
  • Monthly: Brush inspection for hair and debris wrapping.
  • Annually: Seal and gasket check before winterization; store indoors in a cool, dry space.
  • As needed: Impeller or motor service if wear is detected; these are not field-serviceable and go through Maytronics service.
Polaris EPIC 8642 iQ
  • After each run: Lift out the 4 L filter canister and rinse the debris (~10 min); check the cable swivel.
  • Every 2-4 weeks: Deep-clean the canister if debris load is heavy; wipe the brush cartridge.
  • Every 6-12 months: Replace brush cartridge (~$60-80 typical Polaris pricing).
  • Annually: Replace filter canister (~$120).
  • Seasonally: Store the cleaner, caddy and control box indoors and out of freezing conditions; inspect the cable and its connector for corrosion; check wall-climb wheels for algae film.
05 Evidence

How much each of these is standing on.

Classifications rest on different depths of evidence. A pre-release assessment and a verified one are not the same kind of claim.

Evidence behind each classification
Robot Evidence status Sources reviewed Last assessed
Maytronics Dolphin Liberty 400 Pending 3 Aug 2026
Polaris EPIC 8642 iQ Pending 3 Aug 2026

Robovations classifies robots; it does not rank them. Nothing on this page is a recommendation, and no manufacturer influences a classification or its placement here.