Seauto SAT20 Pro
#5 in CordlessFull review
A tracked, sonar-guided full-pool robot at a low price for mid-size and large pools. Buyers who want scheduling or a clear warranty should look at WYBOT.
Amazon $299.99$299.99
The Seauto SAT20 Pro is the better robotic pool cleaner overall, rated 4.2 to 4.0. The Seauto SAT20 Pro leads on value and navigation. The Seauto SAT20 Pro costs $200 less ($299.99 vs $499.99).
Ecovacs Ultramarine P1
#21 in CordlessFull review
A sensible first robot for mid-size pools whose owners want fine filtration and app scheduling for about $500. Ecovacs says it’s for daily upkeep, not heavy-duty cleaning.
Ecovacs $499.99$499.99
Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Seauto SAT20 Pro for value ($300 vs $500) and navigation (Ultrasonic vs Gyroscope).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every cordless robotic pool cleaner; a clear win is highlighted. How we rank explains each one.
| Factor weight | Seauto SAT20 Pro | Ecovacs Ultramarine P1 |
|---|---|---|
| Overall rating | 4.2/5 | 4.0/5 |
| Value 25% | 92 $300 | 70 $500 |
| Cleaning 25% | 85 Floor, walls and waterline | 85 Floor, walls and waterline |
| Navigation 15% | 75 Ultrasonic | 50 Gyroscope |
| Warranty 15% | 50 warranty not published (neutral score used) | 50 warranty not published (neutral score used) |
| Pool size 10% | 100 pools up to 2,150 sq ft | 100 pools up to 1,940 sq ft |
| Features 10% | 50 too few features published (neutral score used) | 67 2 of 3; no easy pickup |
Specifications
| Seauto SAT20 Pro | Ecovacs Ultramarine P1 | |
|---|---|---|
| Pool | ||
| Pool size (rated) | Up to 2,150 sq ft (200 m²) | Up to 1,937 sq ft (180 m²) |
| Pool types | In-ground and above-ground | In-ground and above-ground |
| Surfaces | Tile, concrete, vinyl, fiberglass | Fiberglass, pebble |
| Max depth | - | 9.8 ft |
| Cleaning | ||
| Cleans | Floor, walls and waterline | Floor, walls and waterline |
| Surface skimming | No | No |
| Filter | - | Dual-layer filter (180 µm mesh + 3 µm ultra-fine) |
| Water flow | - | 4,800 gal/h |
| Power | ||
| Power | Cordless (battery) | Cordless (battery) |
| Battery | 168.5 Wh | 4,600 mAh, 24 V |
| Run time | Up to 2 h 30 min | Up to 3 h |
| Charge time | 3 h | 4 h |
| Charging | - | Cable |
| Navigation & app | ||
| Navigation | Ultrasonic | Gyroscope |
| App | No | Yes |
| Connectivity | - | Bluetooth |
| Scheduling | - | Yes |
| Retrieval | - | Stops near the pool edge when done (hook included) |
| Build | ||
| Water resistance | IP68 | IP68 |
| Weight | 19.8 lb (9 kg) | - |
| Released | - | 2026 |