Robot mower buying guide
How to choose a robot lawn mower
Start with the parts of your property that can disqualify a mower, then compare conveniences and price. Capacity alone is never enough.
Quick answer
Measure the mowable area, steepest slope, narrowest passage, tree cover, separate zones, and dangerous edges first. Choose a navigation system that fits those conditions, add capacity headroom, then verify support, replacement parts, and current local availability.
See real US models to compareHow this guide was produced
This guide analyzes published product documentation and the RoboMowerIndex catalog. See our research methodology and editorial standards.
Map the property before comparing models
Robot mower marketing usually starts with maximum lawn area. Your first worksheet should start somewhere else: the actual mowable area, the number of disconnected zones, narrow passages, slopes, overhead tree cover, retaining walls, ponds, roads, and places where a robot could become trapped.
Separate hard constraints from preferences. A mower that cannot navigate under your trees or safely handle the steepest section is a poor fit even if its price, app, and listed capacity look ideal.
- Measure mowable grass rather than total lot size.
- Record the steepest sustained grade and any side slopes.
- Count separate zones and measure the narrowest connector.
- Mark drop-offs, water, public sidewalks, and traffic edges.
Pick the setup and navigation family
Boundary-wire systems use a physical perimeter signal. They require installation work, but the boundary can remain dependable in yards where satellite reception or visual mapping is difficult. Wire-free systems can use RTK satellite positioning, cameras, LiDAR, or a combination. They reduce buried-wire work but still have environmental limits.
Do not treat every wire-free mower as interchangeable. RTK performance depends on the mower and reference station seeing enough sky. Vision depends on usable visual boundaries and lighting. LiDAR can map geometry without satellite positioning, but range, occlusion, and changing vegetation still matter.
Use capacity as headroom, not a promise
Published capacity is a useful comparison field, not a guaranteed daily result. Complex shapes, slopes, wet-weather interruptions, narrow corridors, charging cycles, grass growth, and conservative schedules all reduce practical throughput.
A simple lawn may work near a mower's published limit. A complicated property should leave more margin. Compare runtime, charge time, mowing rate when available, and the manufacturer's assumptions instead of buying solely by acreage on the box.
Evaluate the ownership system
The mower is only part of the purchase. Check dealer or direct support, warranty coverage, blades, wheels, power supplies, antennas, boundary supplies, batteries, winter storage guidance, app requirements, and whether important functions depend on a subscription or cellular service.
Finally, confirm the exact regional variant and retailer listing. Similar model names can hide different cutting-height ranges, radios, included accessories, warranty terms, or availability by country.
Buyer checklist (7)
- Mowable area measured with capacity headroom
- Slope expressed in the same unit as the manufacturer rating
- Navigation checked against trees, buildings, and boundaries
- Narrow passages and separate zones verified
- Edge-trimming expectations understood
- Safety plan for water, roads, drop-offs, pets, and children
- Local support, parts, warranty, and retailer stock confirmed
Frequently asked questions
What should I measure before buying a robot lawn mower?
Measure mowable grass, the steepest slope, the narrowest passage, and separate lawn zones. Note tree cover, buildings, water, roads, and drop-offs before comparing model names or prices.
Should a robot mower's capacity match my lot size?
Use mowable grass, not the total lot size. Leave capacity headroom for obstacles, slopes, charging, weather interruptions, and the hours you want the mower to run.
What should I check besides the mower's price?
Confirm the exact US model, package contents, local support, warranty, replacement parts, and any connectivity or subscription requirements. Check the current retailer listing before buying.
US models to research with this guide
Examples from the live catalog, not editorial winners. Check each model’s documented setup, source dates, and retailer availability. Recorded prices may change; MSRP is labeled separately.
- Dreame A3 AWD 1000
0.25 acres · 80% slope · AWD/4WD
LiDAR + Vision
$1,599.99 at Amazon
All Dreame models - ECOVACS GOAT A2000 LiDAR PRO
0.5 acres · 50% slope
LiDAR + Vision
$1,999.99 at Amazon
All ECOVACS models - eufy Robot Lawn Mower E15
0.2 acres · 32.5% slope
Vision
$1,299.99 at Amazon
All eufy models - Greenworks Commercial AiMowbot C20
0.5 acres · 45% slope
RTK + Vision
$1,299.99 at Amazon
All Greenworks Commercial models - Husqvarna Automower 410 iQ
0.5 acres · 45% slope
RTK + Vision
$2,599.99 at Amazon
All Husqvarna models - iGarden R 35
0.19 acres · 46% slope
RTK + Vision
$1,099 MSRP
All iGarden models
Apply the guide to real models
Open the source-backed catalog with a useful starting filter, then verify the exact model page and linked documentation.
Compare US models in the catalog