Dolphin Niya Sonar 20 Cordless Robotic Pool Cleaner — Sonar Navigation, 26 ft Range, 1.5 hr

The Niya Sonar 20 is a cordless, sonar-guided robotic pool cleaner from the creators of Dolphin that autonomously cleans pool floors in above-ground and small in-ground pools up to 26 feet.

The Niya brand arrives from Maytronics — the team behind Dolphin — delivering proven pool robotics at an approachable price. The Sonar 20 focuses on efficient floor cleaning with a rechargeable, splash-proof charger and sonar navigation that maps pool contours to avoid missed spots and unnecessary energy use. Designed for homeowners who want reliable automated floor cleaning without the tangle of cables, Sonar 20 is compact, easy to handle, and built for outdoor charging and storage.

How does the Sonar 20 navigate and find dirt?

Sonar-guided mapping steers the robot across your pool floor to prioritize dirty areas and move methodically instead of wandering randomly. This produces faster coverage with fewer repeat passes and reduces run time while maintaining consistent suction and brushing action.

• Sonar sensors scan pool shape and obstacles to plot an efficient route.
• System focuses on high-debris zones for targeted cleaning.
• Path planning reduces battery drain and unnecessary overlap.

How long does it run and what happens when the battery is low?

Sonar 20 runs for around 1.5 hours on a single charge, which is tuned for above-ground and smaller in-ground pools up to 26 feet. When the battery runs low or the cycle completes, the robot automatically parks at the pool wall so you can retrieve it easily — no netting or fishing required.

• Up to 1.5 hours of cordless operation per charge.
• Automatic parking at the pool wall for easy removal.
• Quick-grab design keeps handling simple and mess-free.

What pool types and surfaces does the Sonar 20 support?

Sonar 20 is made for above-ground pools and small in-ground pools up to 26 feet in length and is optimized for floor cleaning only. It performs well on vinyl, fiberglass and standard plaster floors, delivering consistent suction and agitation to lift settled debris.

• Recommended for pools up to 26 feet long.
• Effective on vinyl, fiberglass and plaster pool floors.
• Not designed for wall or waterline scrubbing — floor cleaning only.

How durable and weather-ready is the charger and robot?

The Sonar 20 includes a rugged, splash-proof external charger designed for outdoor use so you can store and charge it by the pool without worrying about light storms or splashes. The robot housing and components are built to withstand regular backyard use and straightforward maintenance.

• Splash-proof charger rated for outdoor poolside charging.
• Robust housing suited to routine pool environments.
• Easy-access filter or basket for quick debris removal and cleaning.

Who is this for? The Niya Sonar 20 is aimed at pool owners who want a cordless, no-fuss floor-cleaning robot for above-ground or smaller in-ground pools up to 26 feet. It’s ideal for busy households that prioritize simple operation, outdoor charging convenience, and sonar-assisted coverage without the premium cost of advanced multi-surface cleaners. If you need automated wall or waterline cleaning, a larger robot may be a better fit; for compact, effective floor cleaning with reliable retrieval and outdoor charging, Sonar 20 is a practical choice.