Robotic pool cleaner comparison

BWT RC50 vs Dolphin Explorer E40

A side-by-side comparison of pool fit, cleaning coverage, filtration, controls and the better Pool Express option.

By Brian Williamson, Pool Express product specialist
Updated November 9, 2026

Better alternative

A stronger Pool Express option

BWT RC50 and Dolphin Explorer E40 are compared feature by feature below. For a stronger Pool Express option, consider Clear S. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.

Buy Clear S Compare every robot

BWT

BWT RC50

Inground pools that need floor cleaning.

Listed price $1,399

View better alternatives

Explorer

Dolphin Explorer E40

Inground pools up to 50 ft that need floor cleaning.

Listed price $1,599

View better alternatives

A better alternative

What we recommend instead

Pool Express pick

Clear S

Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.

$1,749

Buy Clear S

Buying guidance

BWT RC50 or Dolphin Explorer E40: our take

BWT RC50 and Dolphin Explorer E40 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. Each cleans floor, so coverage alone does not separate them. BWT RC50's documented cleaning system includes 2 active brushes.

Filtration and debris

The available manufacturer records do not fully identify the filter media supplied with either robot, so filtration should be confirmed before ordering.

Controls and day-to-day ownership

Both models provide no fully published timer, app or remote specification.

Price, warranty and the decision

BWT RC50 is listed at $1,399 and Dolphin Explorer E40 at $1,599; BWT RC50 is $200 less. Each lists a 3-year manufacturer warranty. BWT RC50 and Dolphin Explorer E40 each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Clear S. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.

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	BWT RC50	Dolphin Explorer E40
Cleans the pool floor	Yes	Yes
Climbs and cleans walls	No	No
Scrubs the waterline	No	No
Fine-debris filter included	No	No
Large-debris filter	No	No
Automatic scheduling	Not listed	Not listed
Smartphone app	Not listed	Not listed
Anti-tangle swivel	Not listed	Not listed
3-year warranty	Yes	Yes
No recharging between cycles	Not listed	Not listed
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 BWT RC50 stands out

BWT RC50 is the better fit for shoppers prioritizing the lower $1,399 starting price.

Is listed $200 lower
2 scrubbing brushes

Where Dolphin Explorer E40 stands out

Dolphin Explorer E40 is the better fit for inground pools up to 50 ft that need floor cleaning.

For pools up to 50 ft