Sunseeker is gearing up for the 2026 gardening season with a fresh entry in the growing world of wire-free robot lawn care: the Sunseeker S4, a robotic mower that uses LiDAR for navigation and mapping. Built around a 360-degree LiDAR sensor and paired with an AI-powered camera, the S4 is designed to deliver accurate lawn mapping and dependable obstacle avoidance—without relying on an RTK antenna.
The company has been expanding its presence beyond its earlier markets, and after previously introducing camera-based mower models and other lines that used RTK-style positioning, Sunseeker now appears ready to add multiple new machines to its lineup. The S4 has already been shown publicly, and signs point to an upcoming release: the mower is appearing on retailer listings in the United States with a price of $1,599 and preorder availability. Current delivery estimates suggest it may start shipping around March 10, though it’s not yet clear whether that price is an introductory promotion or the long-term retail price.
What makes the Sunseeker S4 particularly interesting is its move toward LiDAR-based navigation, a technology many people recognize from robot vacuum cleaners, now increasingly used outdoors to simplify setup and improve reliability. Sunseeker’s approach combines LiDAR and vision, branding the pairing as an “Allsense 3D Sensing System.” The goal is straightforward: create a mower that can map the yard precisely, recognize obstacles more effectively, and operate confidently without extra external hardware like an RTK base station.
On the feature side, the S4 is aimed at typical suburban lawn sizes, rated for yards up to 10,800 square feet (about 0.25 acres). It also includes a “Drop to Go” style automatic mapping capability intended to get users mowing faster with less manual setup. Practical lawn-finishing tools are included too, such as an edge-following mode to help trim along borders, plus dual map storage for people who need to manage multiple zones or separate lawn areas.
For tougher terrain, Sunseeker says the S4 can handle slopes up to 42% (around 22 degrees), which should cover many hilly yards that challenge lower-end robot mowers.
With LiDAR navigation, AI camera support, and a focus on simpler installation, the Sunseeker S4 looks positioned as a strong contender among wire-free robot mowers for 2026—especially for homeowners who want accurate mapping and obstacle avoidance without adding an RTK antenna to the setup.
