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ROBOVATIONS/CLASSIFICATION RECORD/ROBOT LAWN MOWERSRELEASED 2026.03REASSESSED 2026.07.28
Sunseeker

Sunseeker S4

Wire-free coverage for complex yards up to 0.25 acre, with LiDAR and vision navigation replacing boundary-wire installation entirely. Slope capability reaches 42 percent. Field reliability data is limited because the model reached retail in March 2026.

Sunseeker S4
LIST PRICE$1,599MSRP
FIT CHECK

Will the Sunseeker S4 work on your yard?

Describe your yard using the controls. Each choice reads the spec sheet for you, flagging where the Sunseeker S4 is built for your space and where it isn’t.

Yard size

Terrain

Grass type

Boundary setup

A classification of fit for the conditions you set — not a recommendation. Verdicts describe engineering design intent, not test results.

SPECIFICATION

The full spec sheet.

Priced below the category median, with every figure charted against the category below.

16.61 in25.12 inTOP10.79 in25.12 inSIDEDimensional drawing
Key specificationsManufacturer-published
Footprint
16.61 × 25.12 in · 10.79 in tall
Weight
24.3 lbs
Wi-Fi
Supported
Mapping & navigation

3D LiDAR combined with AI Vision, no boundary wire

Where it lands · ranked across 84 robot lawn mowersThis robotMedianTypical range
Price$1,599
$451$32,829
Bottom of range
Noise60dB
50 dB82 dB
Near median
Weight24.3lbs
11.9 lbs160 lbs
Bottom of range

Position shows where the figure sits across the tracked category — not a quality judgment.

Official referencesManufacturer site
OWNERSHIP

Living with it.

New product with proven LiDAR navigation; longitudinal data pending.

CES demonstration confirms navigation capability in complex yards. Limited field history; typical new-mower introduction cycle suggests firmware updates likely in coming months.

Owner effort~45 minhands-on per month
Consumables$60replaceable parts / yr
Reliability trendUnprovenowner-reported arc
What goes wrong · 4 documented · 1 self-recover
Occasional
Blade clogging or dullnessUneven cutting, scalp marks on grass
Owner fixInspect and clean blades weekly; replace annually
Occasional
Charging station soilingPoor dock contact, charging failures or incomplete docking
Owner fixWeekly clean dock contacts and sensor lens
Occasional
Seasonal weather interferenceReduced traction on wet grass; rain pauses operation
Self-recoversAuto-returns to dock during rain; wait for dry
Rare
LiDAR or vision sensor calibration driftNavigation uncertainty, coverage gaps or off-pattern tracking
Owner fixFactory recalibration via app or contact support
Upkeep routine
Weekly52×/yr
Inspect and clean the blade for grass accumulation and debris. · Clean charging dock contacts and sensor lens to ensure reliable docking.
Monthly12×/yr
Check perimeter mapping accuracy via app; re-map zones if drift detected.
Seasonal4×/yr
Replace cutting blade (approximately $20-40 per blade). · Clean and store the mower before winter; charge dock similarly.
As neededno fixed schedule
Firmware updates via mobile app for navigation and reliability improvements. · Clear the yard of large obstacles, branches, or debris before autonomous operation.
Cost over time · past the sticker
PurchaseRunning cost
Year 1
$1,659
Year 3
$1,779
Year 5
$1,899

$1,599 to buy, then about $60 a year for the replaceable parts below. Over three years that is roughly $180 past the sticker price. Excludes electricity and any repairs.

What you replace
  • BladesSeasonally$20–40

Replacement cadence from the maintenance schedule; prices shown where the source documents them.

Safety notes

NoteBlade spinning during operation: Keep hands and feet clear during autonomous operation. Do not reach under deck while running.

NoteCharging station hazard: Place dock on level ground, away from children and pets, with clear docking access.

RECORD

How the assessment has moved.

Every announcement, release and reassessment behind the current classification.

Coming soon
Just launched
Active updates
Settled
Discontinued
  1. Jul 2026 · AssessmentRobovations Score recorded at 71 of 100
  2. Jul 2026 · AssessmentRobovations Score reassessed, overall unchanged at 71
Common questions

What people actually ask.

4 answered
OperationDoes the Sunseeker S4 require a perimeter wire or boundary antenna?
No. 3D LiDAR and AI Vision navigation eliminate the need for perimeter wire, antenna, or base station. The robot maps the yard during initial setup via the mobile app.
OperationWhat is the maximum yard size the S4 can handle?
The S4 covers lawns up to 1,000 m² (approximately 0.25 acre or 10,800 square feet) on a single charge. Larger yards require multiple charge cycles or repositioning.
OperationCan the S4 handle steep or sloped yards?
The S4 is rated for slopes up to 42 percent grade (approximately 22 degrees). Steeper terrain may exceed the mower’s traction and climbing capability.
OperationHow does the S4 handle trees, shade, and complex yard layouts?
Manufacturer positioning emphasizes LiDAR and vision performance in complex yards with trees and shade. Edge-following mode allows trimming around borders without manual intervention.

More in this category

Other robot lawn mowers we have classified.

Segway Navimow i215 LiDARIII
Robot Lawn Mowers

Segway Navimow i215 LiDAR

Wire-free yards under 0.5 acre, autonomous night operation preferred
Provisional$1,399
67/100Capable
Mammotion Yuka MiniIII
Robot Lawn Mowers

Mammotion Yuka Mini

Compact yards under 5,000 sqft, flat-to-gentle terrain, vision-compatible edges
Verified$1,299
65/100Capable
eufy Robot Lawn Mower E15III
Robot Lawn Mowers

eufy Robot Lawn Mower E15

Wire-free yards under 1,500 sqft, open canopy, tech-savvy app users, flat terrain
Verified$1,799
72/100Capable
Segway Navimow i2 AWDIII
Robot Lawn Mowers

Segway Navimow i2 AWD

Wire-free yards under ½ acre, slopes to 40%, seasonal maintenance only
Provisional$999
62/100Capable
Cite / Embed

Reference the Sunseeker S4 classification.

Embed the Autonomy Ladder™ mark or copy the citation. The mark links back to this assessment and updates if the classification changes.

RobovationsAutonomy Ladder™Level IIIConditional AutonomyIndependent classification
Citation
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By RobovationsUpdated: Jul 28, 2026
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