Sunseeker S4
Sunseeker's 2026 LiDAR mower for quarter-acre lawns: 360° LiDAR plus AI vision with no RTK station, 90 minutes per charge and a rain sensor.
Does it fit your lawn?
Set your lawn once; every mower page checks against it.
- Navigation & mapping
- 5.0
- Obstacle avoidance
- 5.0
- Coverage
- 3.1
- Slope & terrain
- 3.7
- Coverage per dollar
At a glance
Sunseeker S4 (Sunseeker S4) covers up to 1,000 m², handles slopes to 42%, and navigates with LiDAR + Vision. It starts at $999.99 at Sunseeker Store, across 1 way to buy.
- Max lawn area
- 1,000 m² (0.25 acre)
- Max slope
- 42% (23°)
- Navigation
- Wire-free 360° 3D LiDAR fused with AI vision (AllSense 3D Fusion)
- Price
- from $999.99
- Cutting
What it's built for
A 360° 3D LiDAR with a 70° vertical field of view, fused with an AI camera, maps a quarter acre with nothing to mount on the roof and detects obstacles in every direction.
Full spec sheet
The specs that decide a robot-mower purchase, in one place.
Ways to buy Sunseeker S4
Every way to buy, cheapest first.
The cheapest way to buy Sunseeker S4 is $999.99 (brand store) via Sunseeker Store, across 1 tracked ways to buy it.
- Check priceSSSunseeker StoreCheapestBrand store
Sunseeker S4 (0.25 acre)
Prices are street prices you pay, not the MSRP above. They change often; each links to its source. The Sunseeker Store price and stock are read from the store's own feed every 3 days (last checked 2026-09-28). BestRobotMower.co is an independent comparison site; confirm the current spec and price with the manufacturer or seller before buying.
Sunseeker S4 vs the alternatives
The models most cross-shopped against this one, head to head.
Sunseeker S4 FAQ
How big a lawn can the Sunseeker S4 mow?
It is rated for lawns of 1,000 m² (0.25 acre), and starts at $999.99 at Sunseeker Store. Rated coverage is a maximum on an open lawn; a complex or obstacle-filled yard covers less.
How steep a slope can the Sunseeker S4 handle?
It is rated to 42% (22°) slope.
Does the Sunseeker S4 work under trees or in shade?
Yes. It navigates with LiDAR and vision rather than depending on a clear-sky satellite lock, so it holds position under dense tree cover.
Can the Sunseeker S4 mow in the rain?
Rain sensor sends it back to the dock (the LiDAR cannot measure in rain or fog); IPX6.
Is the Sunseeker S4 protected against theft?
PIN code and lift and tilt sensor; a 4G-GPS anti-theft module is optional.
How does the Sunseeker S4 avoid obstacles like pets and toys?
360° 3D LiDAR + AI camera + bumper; detects obstacles 360° around and 70° vertically.