Dolphin S400
#12 in CordedFull review
A fully equipped dealer-line robot for large pools, though the Explorer E50 offers similar features for less.
Leslie's $1,784$1,784
3.6/5
A heavy-duty corded Polaris for large in-ground pools, if you can find it from a reliable seller.
- To waterlineCleans
- Sensor-basedNavigation
- 70 ftCable
Check price at Walmart$999
Price checked October 21, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- 4WD and 70 ft swivel cable for big pools
- 7-day timer and a motion-sensing remote
- Dirty-canister light
- Caddy included
Cons
- No app
- Only found through a third-party seller
- Pool size and cycle time not on the Polaris page
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Pool | |
|---|---|
| Pool types | In-ground |
| Cleaning | |
| Cleans | Floor, walls and waterline |
| Surface skimming | No |
| Filter | 5 L canister with dirty-canister indicator |
| Filter capacity | 5 L |
| Power | |
| Power | Corded, 70 ft cable |
| Swivel cable | Yes |
| Navigation & app | |
| Navigation | Sensor-based |
| App | No |
| Scheduling | Yes |
| Retrieval | Easy Lift System |
| Caddy included | Yes |
Alternatives in this type
Hayward R130
#13 in CordedFull review
Hayward’s newer, lighter robot for in-ground or above-ground pools up to 50 ft, with a weekly timer.
ePoolSupply $1,251.95$1,251.95
Dolphin Quantum
#15 in CordedFull review
A dealer-line full-coverage robot for large pools, for owners who do not need an app.
Pool Express $1,649$1,649
Compare
Compare the Polaris 9550 Sport with any other robotic pool cleaner →
More from Polaris: every Polaris product ranked.