Sunseeker X3 Plus

Last updated: October 21, 2026

Sunseeker X3 Plus
3.6/5#15 of 24 in 1/4 to 1 acre robot mowers
3.6

For small, fairly flat, open suburban lawns where buyers want wire-free mowing on a budget. Hilly or heavily shaded yards should look elsewhere.

  • 0.3 acresLawn size
  • RTK + visionNavigation
  • 30% (17°)Max slope
  • $2,790Price / acre
  • 8 inCutting width
  • 2 yearsWarranty
Check price at Amazon$836.98Check price at Sunseeker$999.99

Price checked October 21, 2026. As an Amazon Associate we earn from qualifying purchases.

Pros
  • One of the cheapest ways to get wire-free RTK mowing
  • Offset blade cuts close to fences and paths, so there’s less trimming afterwards
  • Up to 100 zones and no-go areas set from the phone
Cons
  • Only rated for gentle 30% slopes
  • Tom’s Guide found it getting stuck on small divots and fallen branches
  • Needs an RTK antenna with a clear view of the sky
  • Few published specs (battery, noise, waterproofing)

How it scores

The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.

Specifications

Coverage
Lawn size (rated)0.3 acres (13,100 sq ft)
Max slope30% (17°)
Navigation
NavigationRTK + vision
Boundary wire neededNo
RTK stationIncluded
Obstacle avoidanceAI camera + ultrasonic
Multiple zonesYes
No-go zonesYes
Cutting
Cutting width8 in (203 mm)
Cutting height1.6–3.2 in
BladesOffset blade disc
Edge mowingRide-on-edge cutting with offset blade disc
Smart features
Anti-theftGPS tracking and geofence alerts
Build
Warranty2 years

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