LUBA mini 2
Rated for 0.25 acres and 80% grade — that is 38.7°, not 80°. On a real lawn, once you allow for borders and travel paths, plan on about 0.2 acres.
What it handles
All four wheels drive, which is what buys the steeper rating. That puts it in the small group that can work genuinely steep ground.
Navigation includes vision or LiDAR, so it keeps working under tree cover where satellite-only machines lose their fix.
Cross-shopped with
Rated for a similar area, at the same grade or less.
How confident we are
From a single source. We are still verifying it.
Slope corrected from 60% to 80%: no Mammotion source publishes 60% for any LUBA mini 2 variant. The only sub-80 figure is the 40% EDGE slope, which is not the headline rating. AREA UNRESOLVED: 0.25 ac is the 1000 variant; the US store sells only the 1500/1500H, both rated 0.37 ac. Row needs a variant suffix.