Help me choose
A stronger Pool Express option
Dolphin Explorer E40 and Dolphin Proteus DX4 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Premier. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris and heavy leaves.
Explorer
Dolphin Explorer E40
Inground pools up to 50 ft that need floor cleaning.
Proteus
Dolphin Proteus DX4
Inground pools that need floor, wall and waterline cleaning.
What we recommend instead
Dolphin Premier
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris and heavy leaves.
$1,999
Buy Dolphin PremierDolphin Explorer E40 or Dolphin Proteus DX4: our take
Dolphin Explorer E40 and Dolphin Proteus DX4 are compared on pool fit, cleaning reach, debris handling, controls and ownership details. The recommendation is based on the job the robot must do—not a simple feature count.
Pool fit and cleaning reach
Both robots are intended for inground pools. Dolphin Explorer E40 has a published maximum pool length of 50 ft; the other model does not have a verified length in our source material. Dolphin Explorer E40 cleans floor; Dolphin Proteus DX4 cleans floor, walls, and waterline. Dolphin Proteus DX4's documented cleaning system includes 1 active brush.
Filtration and debris
Dolphin Proteus DX4 has documented included filtration—Basket—while the other model's included media is not fully published. Dolphin Proteus DX4 has the better documented path for bulky leaves and larger debris.
Controls and day-to-day ownership
Dolphin Explorer E40 provides no fully published timer, app or remote specification; Dolphin Proteus DX4 provides a weekly timer and power-supply controls.
Price, warranty and the decision
Dolphin Explorer E40 is listed at $1,599 and Dolphin Proteus DX4 at $1,199; Dolphin Proteus DX4 is $400 less. Dolphin Explorer E40 lists a 3-year warranty compared with 2 years for Dolphin Proteus DX4. Dolphin Explorer E40 and Dolphin Proteus DX4 each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Dolphin Premier. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris and heavy leaves.
Feature check: what each robot actually has
A green check means the feature is documented as included. A red X means it is documented as absent. A dash means the source does not make the feature clear.
| Feature | Dolphin Explorer E40 | Dolphin Proteus DX4 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | No | YesEdge |
| Scrubs the waterline | No | YesEdge |
| Fine-debris filter included | No | No |
| Large-debris filter | No | YesEdge |
| Automatic scheduling | Not listed | Yes |
| Smartphone app | Not listed | No |
| Anti-tangle swivel | Not listed | Yes |
| 3-year warranty | YesEdge | No |
| No recharging between cycles | Not listed | Yes |
| Built-in UV-C water treatment | No | No |
Unknown is not treated as “no.” Specifications come from the product pages, current catalog records and manufacturer material collected for this site.
Where Dolphin Explorer E40 stands out
Dolphin Explorer E40 is the better fit for inground pools up to 50 ft that need floor cleaning.
- Carries a 3-year warranty instead of 2 years
- Cleans the pool floor
Where Dolphin Proteus DX4 stands out
Dolphin Proteus DX4 is the better fit for shoppers prioritizing the lower $1,199 starting price.
- Cleans the floor, walls and waterline instead of stopping below the tile line
- Includes a large-debris bin or bag for leaves
- Is listed $400 lower
Dolphin Explorer E40 vs Dolphin Proteus DX4 specifications
Use pool fit first. Price and app control do not make up for a robot that cannot cover the length or surfaces you need cleaned.
| Specification | Dolphin Explorer E40 | Dolphin Proteus DX4 |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor cleaning. | Inground pools that need floor, wall and waterline cleaning. |
| Starting price | $1,599 | $1,199 |
| Pool type | Inground | Inground |
| Maximum pool length | Up to 50 ft | Not listed |
| Cleaning coverage | Floor | Floor, Walls, Waterline |
| Power | Not listed | Corded |
| Filtration | Not listed | Basket |
| Scheduling | Not listed | Weekly schedule |
| App and remote | Not listed | Power-supply controls |
| Cable | Not listed | 60 ft with anti-tangle swivel |
| Robot weight | Not listed | Not listed |
| Warranty | 3 years | 2 years |
Consider the stronger Pool Express option
Dolphin Explorer E40 and Dolphin Proteus DX4 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Premier. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris and heavy leaves.
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