Help me choose
A stronger Pool Express option
Dolphin Explorer E20 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 E20
Inground and above-ground pools up to 33 ft that need floor and wall 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 E20 or Dolphin Liberty 300: our take
Dolphin Explorer E20 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
Both robots are intended for inground and above-ground pools. Dolphin Explorer E20 has a published maximum pool length of 33 ft; the other model does not have a verified length in our source material. Each cleans floor and walls, so coverage alone does not separate them. Dolphin Explorer E20 lists 1 active brush and Dual DC motors. Dolphin Liberty 300 lists Dual DC motors.
Filtration and debris
Dolphin Explorer E20 includes Basket; Dolphin Liberty 300 includes Basket and UltraFilter. Dolphin Liberty 300 has the clearer documented edge for fine silt, pollen and sand.
Controls and day-to-day ownership
Dolphin Explorer E20 provides one-touch starts and power-supply controls; Dolphin Liberty 300 provides no fully published timer, app or remote specification. Dolphin Explorer E20 uses a 40 ft corded cable, while Dolphin Liberty 300 uses cordless battery power.
Price, warranty and the decision
Dolphin Explorer E20 is listed at $699 and Dolphin Liberty 300 at $1,099; Dolphin Explorer E20 is $400 less. Each lists a 2-year manufacturer warranty. Dolphin Explorer E20 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 E20 | Dolphin Liberty 300 |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | No | No |
| Fine-debris filter included | No | YesEdge |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | No | Not listed |
| Smartphone app | No | Not listed |
| Anti-tangle swivel | Not listed | Not listed |
| 3-year warranty | No | No |
| No recharging between cycles | YesEdge | 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 E20 stands out
Dolphin Explorer E20 is the better fit for shoppers prioritizing the lower $699 starting price.
- Runs from continuous plug-in power without a recharge between cycles
- Is listed $400 lower
Where Dolphin Liberty 300 stands out
Dolphin Liberty 300 is the better fit for owners who value cordless handling more than automatic scheduling and continuous power.
- Includes filtration for sand, pollen and other fine debris
- Cordless, battery powered
Dolphin Explorer E20 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 E20 | Dolphin Liberty 300 |
|---|---|---|
| Best fit | Inground and above-ground pools up to 33 ft that need floor and wall cleaning. | Inground and above-ground pools that need floor and wall cleaning, with fine debris, without a power cord. |
| Starting price | $699 | $1,099 |
| Pool type | Inground, Above-ground | Inground, Above-ground |
| Maximum pool length | Up to 33 ft | Not listed |
| Cleaning coverage | Floor, Walls | Floor, Walls |
| Power | Corded | Cordless |
| Filtration | Basket | Basket, UltraFilter |
| Scheduling | One-touch start | Not listed |
| App and remote | Power-supply controls | Not listed |
| Cable | 40 ft | Cordless |
| Robot weight | 14.5 lb | Not listed |
| Warranty | 2 years | 2 years |
Consider the stronger Pool Express option
Dolphin Explorer E20 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.
More robotic pool cleaner comparisons
Keep comparing without rebuilding the same specification table yourself.
Clear UV vs Clear S
Pool Express pick: Clear UV
Dolphin Quantum vs Clear S
Pool Express pick: Dolphin Quantum
Dolphin Premier vs Dolphin Sigma
Pool Express pick: Dolphin Premier
Dolphin Premier vs Dolphin Quantum
Pool Express pick: Dolphin Quantum
Dolphin Sigma vs Dolphin Quantum
Pool Express pick: Dolphin Quantum
Dolphin Cayman vs Dolphin Escape
Pool Express pick: Dolphin Cayman