Help me choose
A stronger Pool Express option
Dolphin Explorer E40 and Dolphin Liberty 300 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Cayman. Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
Explorer
Dolphin Explorer E40
Inground pools up to 50 ft that need floor cleaning.
Liberty
Dolphin Liberty 300
Inground and above-ground pools that need floor and wall cleaning, with fine debris, without a power cord.
What we recommend instead
Dolphin Cayman
Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
$1,079
Buy Dolphin CaymanDolphin Explorer E40 or Dolphin Liberty 300: our take
Dolphin Explorer E40 and Dolphin Liberty 300 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
Dolphin Explorer E40 is intended for inground pools, while Dolphin Liberty 300 is intended for inground and above-ground 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 Liberty 300 cleans floor and walls. Dolphin Liberty 300's documented cleaning system includes Dual DC motors.
Filtration and debris
Dolphin Liberty 300 has documented included filtration—Basket and UltraFilter—while the other model's included media is not fully published. Dolphin Liberty 300 has the clearer documented edge for fine silt, pollen and sand. Dolphin Liberty 300 has the better documented path for bulky leaves and larger debris.
Controls and day-to-day ownership
Both models provide no fully published timer, app or remote specification.
Price, warranty and the decision
Dolphin Explorer E40 is listed at $1,599 and Dolphin Liberty 300 at $1,099; Dolphin Liberty 300 is $500 less. Dolphin Explorer E40 lists a 3-year warranty compared with 2 years for Dolphin Liberty 300. Dolphin Explorer E40 and Dolphin Liberty 300 each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Dolphin Cayman. Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
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 Liberty 300 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | No | YesEdge |
| Scrubs the waterline | No | No |
| Fine-debris filter included | No | YesEdge |
| Large-debris filter | No | YesEdge |
| Automatic scheduling | Not listed | Not listed |
| Smartphone app | Not listed | Not listed |
| Anti-tangle swivel | Not listed | Not listed |
| 3-year warranty | YesEdge | No |
| No recharging between cycles | Not listed | No |
| 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 Liberty 300 stands out
Dolphin Liberty 300 is the better fit for shoppers prioritizing the lower $1,099 starting price.
- Adds wall climbing and scrubbing
- Includes filtration for sand, pollen and other fine debris
- Includes a large-debris bin or bag for leaves
- Is listed $500 lower
Dolphin Explorer E40 vs Dolphin Liberty 300 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 Liberty 300 |
|---|---|---|
| Best fit | Inground pools up to 50 ft that need floor cleaning. | Inground and above-ground pools that need floor and wall cleaning, with fine debris, without a power cord. |
| Starting price | $1,599 | $1,099 |
| Pool type | Inground | Inground, Above-ground |
| Maximum pool length | Up to 50 ft | Not listed |
| Cleaning coverage | Floor | Floor, Walls |
| Power | Not listed | Cordless |
| Filtration | Not listed | Basket, UltraFilter |
| Scheduling | Not listed | Not listed |
| App and remote | Not listed | Not listed |
| Cable | Not listed | Cordless |
| Robot weight | Not listed | Not listed |
| Warranty | 3 years | 2 years |
Consider the stronger Pool Express option
Dolphin Explorer E40 and Dolphin Liberty 300 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Cayman. Inground and above-ground pools up to 40 ft that need floor and wall cleaning.
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