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Robot Lawn Mowers — questions & answers

The real questions homeowners ask before buying a robot mower — wire vs wireless, slopes, shade, and whether they're worth the money.

Boundary wire vs GPS (wire-free) robot mower — which is better?

For most buyers in 2026, wire-free wins. Wire-free mowers use RTK-GPS, LiDAR or cameras to map your lawn, so setup is fast, boundaries are easy to change in an app, and there's no cable to cut or repair. They suit larger and irregular lawns. Boundary-wire mowers are cheaper and don't rely on satellite signal — which makes them better under heavy tree cover or on a tight budget — but burying the wire is tedious and a damaged cable stops the mower. Short version: wire-free for most; wired for dense shade or low budget.

Are robot lawn mowers worth it?

If you'd happily reclaim your weekend, yes. A robot mower cuts a little every day, which keeps the lawn consistently neat and actually healthier, since the fine clippings mulch back in. Most people save roughly an hour a weekend. The trade-offs: they cost more upfront than a push mower, the docking station needs an outdoor power point, and initial setup is more involved. For medium-to-large or awkward lawns, the time saved usually justifies it.

What should I look for in a robot mower for a sloped lawn?

All-wheel drive is the single most important feature. AWD models handle gradients up to around 70% (about 38°), while two-wheel-drive and boundary-wire mowers typically lose traction above ~30% and start skidding, leaving bare patches. Also look for a low centre of gravity and grippy tyres. If your property has any meaningful hill, start with AWD models — browse our lawn mowers and compare the slope ratings side by side.

Do robot lawn mowers work under trees and in shade?

It depends on the navigation type. GPS/RTK mowers need a clear view of the sky, so a dense tree canopy or tall buildings can weaken the satellite signal and confuse them. Mowers that use LiDAR or onboard cameras build a map of the yard instead and cope far better in shade and low light. If your lawn is heavily shaded or tightly landscaped, favour a LiDAR or vision-based model, a fusion system that combines several sensors, or an older boundary-wire mower, which doesn't rely on GPS at all.