Help me choose
A stronger Pool Express option
BWT RC50 and Dolphin S100 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
S-Line
Dolphin S100
Inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris.
What we recommend instead
Dolphin Quantum
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$1,649
Buy Dolphin QuantumBWT RC50 or Dolphin S100: our take
BWT RC50 and Dolphin S100 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
BWT RC50 is intended for inground pools, while Dolphin S100 is intended for inground and above-ground pools. Dolphin S100 has a published maximum pool length of 33 ft; the other model does not have a verified length in our source material. BWT RC50 cleans floor; Dolphin S100 cleans floor and walls. BWT RC50 lists 2 active brushes. Dolphin S100 lists 1 active brush.
Filtration and debris
Dolphin S100 has documented included filtration—Basket and UltraFilter—while the other model's included media is not fully published. Dolphin S100 has the clearer documented edge for fine silt, pollen and sand. Dolphin S100 has the better documented path for bulky leaves and larger debris.
Controls and day-to-day ownership
BWT RC50 provides no fully published timer, app or remote specification; Dolphin S100 provides a weekly timer and power-supply controls.
Price, warranty and the decision
BWT RC50 is listed at $1,399 and Dolphin S100 at $849; Dolphin S100 is $550 less. BWT RC50 lists a 3-year warranty compared with 2 years for Dolphin S100. BWT RC50 and Dolphin S100 each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Dolphin Quantum. 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 S100 |
|---|---|---|
| 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 | Yes |
| Smartphone app | Not listed | No |
| Anti-tangle swivel | Not listed | Not listed |
| 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 BWT RC50 stands out
BWT RC50 is the better fit for inground pools that need floor cleaning.
- Uses 2 active brushes instead of 1
- Carries a 3-year warranty instead of 2 years
Where Dolphin S100 stands out
Dolphin S100 is the better fit for shoppers prioritizing the lower $849 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 $550 lower
BWT RC50 vs Dolphin S100 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 | BWT RC50 | Dolphin S100 |
|---|---|---|
| Best fit | Inground pools that need floor cleaning. | Inground and above-ground pools up to 33 ft that need floor and wall cleaning, with fine debris. |
| Starting price | $1,399 | $849 |
| Pool type | Inground | Inground, Above-ground |
| Maximum pool length | Not listed | Up to 33 ft |
| Cleaning coverage | Floor | Floor, Walls |
| Power | Not listed | Corded |
| Filtration | Not listed | Basket, UltraFilter |
| Scheduling | Not listed | Weekly schedule |
| App and remote | Not listed | Power-supply controls |
| Cable | Not listed | 50 ft |
| Robot weight | Not listed | 14 lb |
| Warranty | 3 years | 2 years |
Consider the stronger Pool Express option
BWT RC50 and Dolphin S100 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Quantum. Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
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