Help me choose
A stronger Pool Express option
BWT RC50 and Niya Sonar 20 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Escape. Inground and above-ground pools up to 30 ft that need floor cleaning.
Niya Sonar
Niya Sonar 20
Above-ground pools up to 26 ft that need the floor cleaned without a cord.
What we recommend instead
Dolphin Escape
Inground and above-ground pools up to 30 ft that need floor cleaning.
$669
Buy Dolphin EscapeBWT RC50 or Niya Sonar 20: our take
BWT RC50 and Niya Sonar 20 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 Niya Sonar 20 is intended for above-ground pools. Niya Sonar 20 has a published maximum pool length of 26 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 lists 2 active brushes. Niya Sonar 20 lists Sonar navigation and Dual drive motors.
Filtration and debris
Niya Sonar 20 has documented included filtration—Basket—while the other model's included media is not fully published. Niya Sonar 20 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; Niya Sonar 20 provides one-touch starts and power-supply controls.
Price, warranty and the decision
BWT RC50 is listed at $1,399 and Niya Sonar 20 at $199; Niya Sonar 20 is $1,200 less. BWT RC50 lists a 3-year warranty compared with 1 years for Niya Sonar 20. BWT RC50 and Niya Sonar 20 each have a specific fit, but neither is the Pool Express pick for this job. Our better alternative is Dolphin Escape. Inground and above-ground pools up to 30 ft that need floor 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 | BWT RC50 | Niya Sonar 20 |
|---|---|---|
| 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 | YesEdge |
| Automatic scheduling | Not listed | No |
| Smartphone app | Not listed | No |
| 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 BWT RC50 stands out
BWT RC50 is the better fit for inground pools that need floor cleaning.
- Carries a 3-year warranty instead of 1 years
- 3-year warranty
Where Niya Sonar 20 stands out
Niya Sonar 20 is the better fit for shoppers prioritizing the lower $199 starting price.
- Includes a large-debris bin or bag for leaves
- Is listed $1,200 lower
BWT RC50 vs Niya Sonar 20 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 | Niya Sonar 20 |
|---|---|---|
| Best fit | Inground pools that need floor cleaning. | Above-ground pools up to 26 ft that need the floor cleaned without a cord. |
| Starting price | $1,399 | $199 |
| Pool type | Inground | Above-ground |
| Maximum pool length | Not listed | Up to 26 ft |
| Cleaning coverage | Floor | Floor |
| Power | Not listed | Cordless |
| Filtration | Not listed | Basket |
| Scheduling | Not listed | One-touch start |
| App and remote | Not listed | Power-supply controls |
| Cable | Not listed | Cordless |
| Robot weight | Not listed | 10 lb |
| Warranty | 3 years | 1 years |
Consider the stronger Pool Express option
BWT RC50 and Niya Sonar 20 are compared feature by feature below. For a stronger Pool Express option, consider Dolphin Escape. Inground and above-ground pools up to 30 ft that need floor cleaning.
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