poolcleanerreviews

Robotic pool cleaner review

Polaris ERA 820 Robotic Pool Cleaner

6.0FairValue 2.1/10
CordedWallsWaterlineSkims surfaceWi-FiBluetoothNavigation n/a

Spec-based review: scored from Polaris's published specifications with the same weights as every other robotic cleaner. Not a hands-on test. How we score.

Our take

The Polaris ERA 820 Robotic Pool Cleaner is a corded robotic pool cleaner from Polaris. It cleans the floor and walls, navigates in a pattern its maker doesn’t describe, and has no app. Its cable is 60 ft long.

On paper it scores 6.0 out of 10 (fair) against other robotic cleaners. Its strongest areas are pool size (10.0) and runtime (8.5). Where it gives ground: app & connectivity (2.0) and navigation (4.0). The maker doesn’t say how it navigates.

The best price we found is $899 at Leslie's. The typical robotic cleaner we track costs $899, so this one is about average. For what it does, its value score is 2.1 out of 10.

If you want mapping navigation, the cheapest we track with it is the Dreame Z1 Cordless Robotic Pool Cleaner at $349.99.

If you want a Wi-Fi app, the cheapest we track with it is the Dreame Z1 Pro Cordless Robotic Pool Cleaner at $399.99.

To spend less for nearly the same spec score, the WYBOT C2 Cordless Robotic Pool Cleaner (2026 Upgrade) rates 8.4 for $429.

For about the same money, the Beatbot AquaSense 2 Robotic Pool Cleaner scores higher (9.0) at $799.

Bottom line: a fair pick for large pools.

Pros

  • +Climbs and cleans the walls, not just the floor.
  • +Top-access filter basket: no bag to wash out.
  • +Comes with a caddy cart.
  • +Rated for large pools, up to 50 ft long.

Cons

  • −The maker doesn’t say how it navigates.
  • −Climbs walls but doesn’t scrub the waterline.
  • −Corded: the floating cable can tangle and needs the occasional untwist.
  • −No app or remote: settings are on the unit itself.
  • −Filter fineness isn’t stated.
  • −In-ground pools only.

Best for

  • Large pools

Skip it if

  • You want the fastest full-pool coverage
  • You get a scum line at the waterline
  • A cord across the pool bothers you

Where to buy the ERA 820

StoreCheckedBuy
Leslie's$899—todayView deal
In The Swim$899—todayView deal
Home Depotstock not in static HTML (online "buyable": true)$899—todayView deal
INYO Pools$899—todayView deal
Amazonlive—at clickCheck price

Similar-priced alternatives

6.3

Dolphin LIBERTY 200 Cordless Robotic Pool Cleaner

Maytronics Dolphin · Robotic · value 3.0/10

CordlessWallsWaterlineSkims surfaceWi-FiBluetoothSystematic (gyro) nav
  • +Cleans in a systematic pattern rather than at random, using CleverClean.
  • +Climbs and cleans the walls, not just the floor.

$899

at Leslie's

Read review
7.9

Dolphin NAUTILUS EON 100 Cordless Robotic Pool Cleaner

Maytronics Dolphin · Robotic · value 6.7/10

CordlessWallsWaterlineSkims surfaceWi-FiBluetooth?Mapping nav
  • +Maps the pool, using SmartMap Navigation, so it covers the floor methodically instead of bouncing around.
  • +Climbs the walls and scrubs the waterline, where the scum line forms.

$899

at Maytronics Dolphin (US)

Read review

Compare the ERA 820 with any cleaner →

Head to head: Liberty 200 vs ERA 820 · Nautilus EON 100 vs ERA 820