Dolphin Explorer E40
#1 in CordedFull review
A full-coverage Wi-Fi robot for large in-ground pools, with a three-year warranty and extra scrubbing.
Amazon $1,299 Maytronics $1,499 Walmart $1,449 ePoolSupply $1,449$1,299
The Dolphin Explorer E40 is the better robotic pool cleaner overall, rated 4.0 to 3.5. The Polaris P724 wins on value. The Polaris P724 costs $700 less ($599 vs $1,299).
Polaris P724
#19 in CordedFull review
A budget full-coverage Polaris for small and mid-size in-ground pools.
Leslie's $599 Walmart $599$599
Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Polaris P724 for value ($599 vs $1,299).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every corded robotic pool cleaner; a clear win is highlighted. How we rank explains each one.
| Factor weight | Dolphin Explorer E40 | Polaris P724 |
|---|---|---|
| Overall rating | 4.0/5 | 3.5/5 |
| Value 25% | 28 $1,299 | 62 $599 |
| Cleaning 25% | 85 Floor, walls and waterline | 85 Floor, walls and waterline |
| Navigation 15% | 50 navigation not published (neutral score used) | 50 navigation not published (neutral score used) |
| Warranty 15% | 100 3-year warranty | 50 warranty not published (neutral score used) |
| Pool size 10% | 100 pools up to 50 ft long (about 1,250 sq ft) | 50 pool size not published (neutral score used) |
| Features 10% | 100 3 of 3 | 0 0 of 4; no app control, scheduling, swivel cable, caddy |
Specifications
| Dolphin Explorer E40 | Polaris P724 | |
|---|---|---|
| Pool | ||
| Pool size (rated) | Up to 50 ft long | - |
| Pool types | In-ground | In-ground |
| Cleaning | ||
| Cleans | Floor, walls and waterline | Floor, walls and waterline |
| Surface skimming | No | No |
| Filter | Fine Filter Kit, top access | 3 L canister, transparent lid |
| Filter capacity | - | 3 L |
| Water flow | 4,500 gal/h | - |
| Power | ||
| Power | Corded | Corded, 50 ft cable |
| Run time | Longest cycle 2 h 30 min | - |
| Swivel cable | Yes | No |
| Navigation & app | ||
| App | Yes | No |
| Connectivity | Wi-Fi | - |
| Scheduling | Yes | No |
| Caddy included | - | No |
| Build | ||
| Weight | 24.6 lb (11.2 kg) | - |
| Warranty | 3 years | - |