Ecovacs Ultramarine P1
#22 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
The Ecovacs Ultramarine P1 is the better robotic pool cleaner overall, rated 4.0 to 3.8. The Seauto SAT20 wins on value. The Seauto SAT20 costs $320 less ($179.99 vs $499.99).
Seauto SAT20
#29 in CordlessFull review
A bare-bones cordless floor-and-wall cleaner for budget buyers with smooth above-ground pools. Buyers who want sonar navigation and waterline scrubbing should step up to the Seauto SAT 25.
Amazon $179.99$179.99
Prices were last checked October 22, 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 for value ($180 vs $500).
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 | Ecovacs Ultramarine P1 | Seauto SAT20 |
|---|---|---|
| Overall rating | 4.0/5 | 3.8/5 |
| Value 25% | 70 $500 | 100 $180 |
| Cleaning 25% | 85 Floor, walls and waterline | 60 Floor and walls (waterline not stated) |
| Navigation 15% | 50 Gyroscope | 50 navigation not published (neutral score used) |
| Warranty 15% | 50 warranty not published (neutral score used) | 50 warranty not published (neutral score used) |
| Pool size 10% | 100 pools up to 1,940 sq ft | 100 pools up to 2,100 sq ft |
| Features 10% | 67 2 of 3; no easy pickup | 0 0 of 2; no app control, caddy |
Specifications
| Ecovacs Ultramarine P1 | Seauto SAT20 | |
|---|---|---|
| Pool | ||
| Pool size (rated) | Up to 1,937 sq ft (180 m²) | Up to 2,100 sq ft (200 m²) |
| Pool types | In-ground and above-ground | Above-ground and in-ground |
| Surfaces | Fiberglass, pebble | - |
| Max depth | 9.8 ft | 9.8 ft |
| Cleaning | ||
| Cleans | Floor, walls and waterline | Floor and walls |
| Surface skimming | No | No |
| Filter | Dual-layer filter (180 µm mesh + 3 µm ultra-fine) | 300 µm filter basket |
| Water flow | 4,800 gal/h | - |
| Power | ||
| Power | Cordless (battery) | Cordless (battery) |
| Battery | 4,600 mAh, 24 V | 7,800 mAh |
| Run time | Up to 3 h | Up to 2 h 30 min |
| Charge time | 4 h | 4 h |
| Charging | Cable | Cable |
| Navigation & app | ||
| Navigation | Gyroscope | - |
| App | Yes | No |
| Connectivity | Bluetooth | - |
| Scheduling | Yes | - |
| Retrieval | Stops near the pool edge when done (hook included) | - |
| Caddy included | - | No |
| Build | ||
| Water resistance | IP68 | IPX8 |
| Weight | - | 13.2 lb (6 kg) |
| Released | 2026 | - |