Segway Navimow X390 vs Segway Navimow X450
Researched by Riley Hart · prices checked Nov 11, 2026
As of Nov 11, 2026, the Segway Navimow X390 costs $4,499 and the Segway Navimow X450 costs $2,999, so the Segway Navimow X450 is $1,500 cheaper. Pick the Segway Navimow X390 for large open properties up to 2.5 acres. Pick the Segway Navimow X450 for hilly or rough yards up to 1.5 acres. The Segway Navimow X450 wins 5 of 9 points we can measure (1 tied).
Who wins, point by point
The Segway Navimow X450 wins 5 of 9 points we can measure (1 tied). Built from today's prices, the specs and independent tests for these two robots.
| X390 | X450 | Winner | |
|---|---|---|---|
| Price today | $4,499 | $2,999 | X450 |
| 3 year cost | $4,499 | $3,032 | X450 |
| Warranty | 3 years | 3 years | Tie |
| Lawn size | 2.5 acre | 1.5 acre | X390 |
| Steepest slope | 50% | 84% | X450 |
| Cut width | 9.3 in | 17 in | X450 |
| Runtime per charge | 4 h | 150 min | X390 |
| Noise | 60 dB | 68 dB | X390 |
| Release year | 2025 | 2026 | X450 |
- You care most about lawn size (2.5 acre vs 1.5 acre)
- You care most about runtime per charge (4 h vs 150 min)
- You care most about noise (60 dB vs 68 dB)
- Best for large open properties up to 2.5 acres
- You want to spend less (saves $1,500)
- You care most about steepest slope (84% vs 50%)
- You care most about cut width (17 in vs 9.3 in)
- Best for hilly or rough yards up to 1.5 acres
- Area
- Up to 2.5 acres
- Max slope
- 50%
- Navigation
- EFLS 3.0: RTK
- Cut width
- 9.3 in
Top X3 model with RTK and vision for lawns up to 2.5 acres
Full Segway Navimow X390 review, pros and cons →- Area
- Up to 1.5 acres
- Max slope
- 84%
- Navigation
- Tri frequency Network
- Cut width
- 17 in
AWD wire free mower for steep yards up to 1.5 acres
Full Segway Navimow X450 review, pros and cons →Side by side
| Segway Navimow X390 | Segway Navimow X450 | |
|---|---|---|
| Price | $4,499 | $2,999 |
| 3 year cost | $4,499 | $3,032 |
| Our score | Not scored yet | Not scored yet |
| Rank in Lawn | #45 | #43 |
| Status | on sale | on sale |
| Warranty | 3 years (Navimow) | Up to 3 years (Navimow) |
| Area | Up to 2.5 acres; map can reach 1.2x that (Navimow) | Up to 1.5 acres (Navimow); Expert Reviews lists 5,000 m² for the UK X450 |
| Max slope | 50% (27°), 25% (14°) at the boundary (Navimow) | 84% (40°) (Navimow); PCWorld's sloped yard posed no trouble for the X430 sibling |
| Navigation | EFLS 3.0: RTK plus VSLAM and visual inertial odometry, 300° RGB and ToF obstacle detection (Navimow) | Tri frequency Network RTK with 360° VSLAM and VIO plus 360° AI vision (Navimow) |
| Boundary wire | Not needed | Not needed |
| Cut width | 9.3 in, single 6 blade disc (Navimow) | 17 in (Navimow) |
| Cut height | 2 to 4 in (Navimow US) | 0.75 to 4 in (Navimow) |
| Battery runtime | 12.8Ah, up to 240 min per charge, about 100 min recharge (Navimow) | Up to 9,600 sq ft per charge, 90 min or less recharge at 224W (Navimow); Expert Reviews saw about 150 min runs on the X430 |
| Drive | Rear wheel drive with traction control, same X3 platform as the X350; no AWD | Four wheel drive, dual suspension, front wheel steering, climbs 2.8 in obstacles (Navimow) |
| Rtk required | Network RTK where covered; RTK antenna for other areas (Navimow, Notebookcheck) | Network RTK where covered; GNSS antenna included for other areas (Navimow) |
| Multi zone | Multiple zones linked by channels; Pro Tool Reviews mapped 4 zones and 3 channels in under 30 min | Up to 120 zones, plus no go areas (Navimow) |
| Noise | 60 dB(A) (Navimow) | Below 68 dB(A) (Navimow) |
| Weather | IP66; pauses in rain and resumes (Pro Tool Reviews) | IP66 (Navimow) |
| Best for | large open properties up to 2.5 acres | hilly or rough yards up to 1.5 acres |
| Skip if | your yard is under an acre or very hilly | your lawn is small and flat |
Specs are maker claims unless a reviewer is named. Prices from the stores we link, checked daily.
What reviewers found
Segway Navimow X390
- Pro Tool Reviews: Tested the X390 on a multi acre property with 4 zones and 3 channels. Mapping took under 30 min, it handled narrow paths, wet grass and minor slopes without slipping and dodged toys and beds. Early passes left uneven spots that improved later, and a hilly, thick grass run covered 43% (6,131 sq ft) before a recharge. Source
- Notebookcheck: Testing the X3 series (X315 unit), it called the line one of the best robot mowers of 2025: reliable mowing, systematic paths and near flawless camera obstacle detection. Downsides were high standby power use, the need for an RTK antenna and a high price, with the X390 listed at $4,999 RRP. Source
Segway Navimow X450
- PCWorld (TechHive): Testing the X430 sibling, it climbed an uneven, sloped yard without spinning, sliding or stalling, stayed inside the boundary around trees and a play set, and did not slip over a raised edge where the i215 had. Editors' Choice; cons were price, size and weight. Source
- Expert Reviews: Testing the X4 series (X430 unit), it praised grip on 40° slopes, gravel and kerbs and easy setup. The first pass was very good, the second excellent, and it stayed 5 to 10 cm from beds. It ran about 150 min per charge and measured 68 dBA. Source
Questions buyers ask
Which is better, the Segway Navimow X390 or the Segway Navimow X450?
Pick the Segway Navimow X390 for large open properties up to 2.5 acres. Pick the Segway Navimow X450 for hilly or rough yards up to 1.5 acres.
Which is cheaper?
The Segway Navimow X450 at $2,999, versus $4,499 for the Segway Navimow X390, checked Nov 11, 2026. Over 3 years with running costs: $4,499 vs $3,032.
What is the difference between the X390 and the X450?
Area: Up to 2.5 acres; map can reach 1.2x that (Navimow) on the X390, Up to 1.5 acres (Navimow); Expert Reviews lists 5,000 m² for the UK X450 on the X450. Max slope: 50% (27°), 25% (14°) at the boundary (Navimow) on the X390, 84% (40°) (Navimow); PCWorld's sloped yard posed no trouble for the X430 sibling on the X450. Navigation: EFLS 3.0: RTK plus VSLAM and visual inertial odometry, 300° RGB and ToF obstacle… on the X390, Tri frequency Network RTK with 360° VSLAM and VIO plus 360° AI vision (Navimow) on the X450.
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