Robotic Lawn Mowers: What to Check Before You Buy

Robotic mowers cut the lawn a little at a time, several times a week, and return to a charging station on their own. For many yards that means less weekend work and a consistently tidy lawn. But they suit some lawns far better than others. This guide covers the questions to answer first. We have not tested any robotic mowers for this guide.

Measure your lawn

Manufacturers rate each model for a maximum lawn area. Measure your own lawn (mapping tools and a tape measure both work) and compare it with the listed figure. A model rated close to your exact lawn size may need to run almost constantly; a little headroom is sensible, especially if your lawn is split into several areas.

Find your steepest slope

Every model lists a maximum slope, usually as a percentage. Steep banks, terraces and sudden dips are where robotic mowers struggle. Check the steepest part of the area you want mowed, not the average, and compare it with the listing.

Boundary wire or wire-free?

• Boundary-wire mowers follow a low-voltage wire pegged around the lawn edge and around beds you want to protect. Installation takes time, but the system is well established.
• Wire-free mowers use satellite positioning (often RTK), cameras or both to map the lawn, usually set up through an app. They avoid laying wire, but may need a clear view of the sky or a reference station, and can be affected by tall trees and buildings.

Read what the listing says about installation, what is included in the box and whether any extra antenna or base station is required.

Narrow passages and multiple zones

If your lawn has a front and back area linked by a side path, check how the mower handles passages and separate zones. Some models need guide wires, some can be carried between zones, and some manage multiple zones in an app. Gravel paths and steps generally mean carrying the mower.

Obstacles, edges and safety

Robotic mowers usually leave a strip at the lawn edge that needs occasional trimming. Look at how the mower detects obstacles and what the listing says about safety features such as lift and tilt sensors that stop the blades. Clearing toys and fallen branches before mowing remains a good habit, and keeping children and pets off the lawn while it runs is always wise.

Connectivity, theft protection and service

Many models offer app control, schedules and alerts over Wi-Fi, Bluetooth or cellular. If your charging station is far from the house, check Wi-Fi range or cellular options. PIN codes, alarms and location tracking can deter theft. Finally, check the warranty, what replacement parts (blades, batteries) cost and whether service is available in your area.

Is a robotic mower right for you?

They tend to suit medium-sized, reasonably flat lawns with simple layouts. Very large, steep or complex yards may need a higher-end model, several zones or a conventional mower. Use the checklist above to compare listings honestly against your own yard.