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Robot Autonomy, Classified
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ComparisonPolaris 9450 Sport and Maytronics Dolphin S200

Up to three

All robot pool cleaners. Every figure below is placed against the whole class, so a gap can be read against how much the class itself varies.

Where each one suits you.

The conditions each robot was assessed against, side by side. Rows marked in gold are where these machines genuinely differ.

Fit verdicts by condition for each robot
Condition Polaris 9450 Sport Dolphin S200
Pool type
In-ground GoodDesigned specifically for in-ground pools; 4WD and wall-climbing brush are optimized for this geometry. GoodDesigned for in-ground pools with pump and return-line infrastructure.
Above-ground PoorManufacturer specifies in-ground pools only; drive configuration is not compatible with above-ground pool walls. PoorRequires pressure-side return line; above-ground pools typically lack this system.
Mixed setupthey differ DependsCapable only on the in-ground pool in the setup; does not cover any above-ground pool sharing the installation. GoodConfirm your pool has a dedicated pressure return line before purchase.
Pool size
Small (< 400 sqft) GoodCovers pools well under 50 feet; 90-minute cycle completes full coverage with capacity to spare. GoodCapable but may be overkill for under 8,000 gallons; a smaller suction cleaner would cost less.
Medium (400 – 800) GoodSystematic gyroscopic navigation handles mid-size in-ground pools up to 50 feet within a single 90-minute cycle. Good12,000–20,000 gallon range is the designed operating envelope.
Large (> 800)they differ Poor60-foot swivel cable limits pool length coverage to 50 feet; pools exceeding that require a longer-cable model. DependsWorks in 20,000+ gallon pools but may require longer runtime or two weekly cycles.
Debris load
Fine (sand / silt) GoodVortex Vacuum Technology draws fine sediment and particles into the 5L canister effectively. GoodFine sediment handled well by pressure-side filtration.
Leaves / large debristhey differ GoodExtra-large 5L canister handles leaf debris without mid-cycle full-canister pauses in most moderate-debris pools. DependsHeavy leaf load risks intake clogging; pre-skimming recommended during fall.
Algae / heavy foulingthey differ GoodSolid-blade scrubbing brush scrubs floor, wall, and waterline surfaces where algae accumulates. DependsFloor and wall algae handled; waterline algae requires manual brushing.
Coverage you want
Floor only GoodSystematic floor coverage is the baseline function; gyroscopic navigation reduces missed strips. GoodDesigned for complete floor coverage.
Floor + walls Good4WD enables wall climbing; manufacturer specs include wall coverage as a documented capability. GoodStandard wall climbing with wall-return port engagement documented in specs.
Floor + walls + waterlinethey differ GoodSolid-blade scrubbing brush reaches the tile line and waterline surface; owner reports describe effective waterline scrubbing. PoorNo waterline jet; algae at tile line is not reached by this model.

A robot being poor for a condition is a fact about fit, not a fault. “Depends” means the record names a limit worth reading, not that the answer is unknown.

Keep going.

The full recordPolaris 9450 SportSpecifications, evidence, the Fit Check in full, and every tracked change.The full recordMaytronics Dolphin S200Specifications, evidence, the Fit Check in full, and every tracked change.

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.