Greenworks AiMowbot C20Z · Mammotion Yuka Mini

RTK accuracy removes perimeter-wire labor but concentrates installation friction: base-station mounting and sky-view siting are critical setup steps, not optional.

4WD and vision replace gas-engine maintenance, but blade replacements and RTK station cleaning remain seasonal obligations, just at lighter intensity than the Optimow’s wire-and-blade churn.

Two batteries under one name. The 600 carries a 2.4 Ah pack and mows up to 55 minutes; the 800 carries a 6.1 Ah pack and mows up to 150. Both dock, recharge and resume unattended, so the smaller pack lengthens the session rather than adding an intervention.

Terrain above the rated gradient, or ground that will not hold traction.

Greenworks rates the C20Z to 24 degrees (45 percent grade) on four-wheel drive. Ground steeper than that sits outside the rating. Thick undergrowth or standing water causes traction and navigation faults independent of slope.

Owners requiring buried perimeter-wire setup.

RTK paired with vision is the only boundary method; there is no wire alternative and no way to skip the app-based setup. Remote scheduling and monitoring need an internet or 4G connection, though mowing itself does not stop when that connection does.

Properties larger than 0.5 acres or requiring multi-zone scheduling.

Single-charge cycle covers roughly 0.4-0.5 acres depending on grass height. Larger lawns need docile pause-and-recharge cycle breaks. No multi-zone or perimeter-subdivision feature documented.

Yards beyond the model's rated area

The 600 is rated for 600 m2, about 6,460 sq ft, and the 800 for 800 m2, about 8,610 sq ft. Past the rating the constraint is total coverage rather than session length, and a larger platform answers it better than more sessions.

Yards under heavy tree canopy

Positioning comes from NetRTK satellite correction, so sky view is what matters. Dense canopy or a walled courtyard that blocks the sky can degrade positioning; ambient brightness and time of day do not.

Owners who need a verified pass-to-pass accuracy figure

Mammotion states centimeter-level positioning through free NetRTK. Robovations has not verified pass alignment on this platform, and Mammotion publishes no pass-to-pass tolerance. Owners whose expectations rest on a measured figure have none to work from.