The best robot lawn mower for a half acre with no perimeter wire
A half-acre lawn, one continuous piece, a slope you notice when you push a mower up it, and no wire you are willing to bury. Every robot mower we track, judged against that yard from the limits its own maker publishes.
For a half-acre lawn with a 20% slope and no buried wire, the Greenworks AiMowbot C40 is the pick: it clears both limits that decide this page with margin, and its $1,500 is the lowest list price of any fitting unit whose maker publishes one; it is also the only pick with no verified Amazon listing, so that figure is Greenworks' own asking price rather than one you can pay in a cart today. The Mammotion LUBA 3 AWD 3000H is what to buy if the slope is steeper than you measured or the ground is soft, because Mammotion rates it to 80% on all four driven wheels, and it is the only pick a reviewer has both measured and lived with. The Husqvarna Automower 420 iQ is the upgrade, with the longest warranty of the three picks at 4 years, and its verified Amazon price of $1,851 undercuts the Mammotion LUBA 3 AWD 3000H's $2,109 and sits far below its own $3,300 list. Of 15 robot mowers judged against this yard, 5 fit, 1 sits right at a limit and 9 do not fit at all.
Two published figures decide this page, and both sit on the maker's own spec sheet: the lawn area the mower is rated to keep cut, and the steepest slope it is rated to climb. The wire answer is the third filter, and it is a hard one, because a mower that needs a buried perimeter cannot be talked into working without it. Two more units clear all three and are still not picks. The Husqvarna Automower 435iQ AWD is rated for far more lawn and far more slope than this yard asks, at the highest list price in the roster, and it cuts a narrower deck and a lower maximum height than any pick here. The Sunseeker X7 clears the limits by a wide margin too, but Sunseeker publishes no price on the product pages we fetched, and a unit we cannot price is a unit we cannot rank against the three above.
Product links on this page will be affiliate links when the site goes live; they do not change which units are picked. How that works.
| Model | Lawn, up to | Slope, up to | Navigation | Cut width | Zones | Warranty | Fit | Price | |
|---|---|---|---|---|---|---|---|---|---|
| Our pick | Greenworks AiMowbot C40 | 43,560 sq ft | 45% | RTK + camera | 12 in | not captured | 3 years | Clears the published limits | $1,500 list |
| Also worth it | Mammotion LUBA 3 AWD 3000H | 32,670 sq ft | 80% | RTK + lidar | 15.7 in | yes | 3 years | Clears the published limits | $2,109 list $2,799 |
| The upgrade | Husqvarna Automower 420 iQ | 43,560 sq ft | 45% | RTK | 9.4 in | yes | 4 years | Clears the published limits | $1,851 list $3,300 |
Who this is for
Read on if your lawn is about 21,780 square feet in one continuous piece, with a slope you would call noticeable rather than a hill, and you have no interest in trenching a wire around the perimeter. Those three things are the inputs this page judges on, and every pick below cleared all three from its maker's own published limits. If your yard is a city lot, the small-yard page is the one for you, because at that size almost everything fits and the question turns into price. And if you already have two or three models in mind, the Navimow vs Mammotion Luba vs Worx Landroid comparison sets them against each other rather than against a house.
Your house, in the makers’ own terms
Makers describe a mower in the terms this page uses. Area is printed as a lawn size the mower is rated to keep cut, not a distance it drives: the Greenworks AiMowbot C40 is rated at 43,560 sq ft, the Husqvarna Automower 420 iQ at the same, and the Mammotion LUBA 3 AWD 3000H at 32,670 sq ft. Against 21,780 square feet all three have room, and the room is the point. MowerBotLab, which tested the Husqvarna, puts its real-world coverage at around a half acre on a complex lawn and reaches the full rating only on an open, simple one. A mower rated exactly to your yard has nothing left for your beds, your trees and your narrow side passage.
Slope is printed in percent, which is rise over run rather than degrees. Your 20% sits well under every pick: 45% on the Greenworks, 45% on the Husqvarna and 80% on the all-wheel-drive Mammotion. The third input is the wire, and answering no to it removes every mower that needs a buried perimeter. What is left are mowers that fix their own position from satellites, with a camera or a laser scanner reading the yard alongside, and none of the three has wire in the box.
Adjust to your house. Change the numbers and the picks are re-judged here, with the same rules and the same maker figures.
A half-acre lawn (21,780 sq ft) with a 20% slope and no boundary wire, run against all 15 robot lawn mowers we track: 5 clear every published limit this house turns on, 1 clear them at a limit, 9 miss one. Every figure is from the maker’s own page or manual; nothing here was tested by us. The method.
Our pickGreenworks AiMowbot C40
The lowest list price of any unit that clears both limits
$1,500 list43,560 sq ft lawn, up to45% slope, up toRTK + camera navigation12 in cut width
The Greenworks AiMowbot C40 is rated for 43,560 sq ft of lawn and for slopes up to 45%, so your yard asks for about half of one limit and well under half of the other. It works out its own position from RTK + camera, which is the requirement that put it on this page. On the makers' own list prices its $1,500 is the lowest of the three, and it is not the small one of the group either: its 12 in swath is wider than the Husqvarna Automower 420 iQ's 9.4 in, and its cut-height range, 0.8 in to 4 in, is the widest of the three picks.
No Amazon listing for the bare unit has passed our identity check yet, so the link goes to the maker and we earn nothing on it. The maker lists it at $1,500.
A half-acre lawn (21,780 sq ft) with a 20% slope and no boundary wire:
- Lawn, up tolawn area limit is 43,560 sq ft; you need 21,780 sq ft greenworkstools.com
- Slope, up toslope limit is 45%; you need 20% greenworkstools.com
- Navigationno boundary wire (RTK + VISION) greenworkstools.com
Living with it
Start with what is missing. No tester has published measurements for the Greenworks AiMowbot C40 and we have no long-term owner reports for it, so everything here comes from Greenworks' own pages. That is a real gap, and it is why this pick rests on the fit reasons: the limits clear your yard with margin, and margin is what protects you when a maker's figures prove optimistic. Greenworks also leaves out the number you would most want for a lawn this size. The page gives a 50 min charge time and no runtime, so how much of the yard falls in one session is not something the company states.
There are two running costs, and neither is a filter. The cellular connection runs on a data plan that expires and has to be renewed, and Greenworks says the anti-theft alarm goes with it, so the connected half of this machine has a recurring bill attached. The battery can be replaced, but only with an officially certified one bought through an authorized channel if the warranty is to survive, and that warranty runs up to 3 years across the C-Series this mower belongs to. Day to day it is the quietest pick here at 54 dB, which Greenworks says is low enough to mow at any hour.
- Battery
- Battery is replaceable, but only with certified batteriesgreenworkstools.com
- Subscription
- 4G connection needs a renewable data plangreenworkstools.com
- Set-up
- Wire-free setup guided through a smartphone appgreenworkstools.com
- Warranty
- Up to a 3-year tool warrantygreenworkstools.com
What you give up
You are buying on the maker's word, and at a price you cannot pay on Amazon. The Husqvarna Automower 420 iQ is its near twin on paper, rated for the same 43,560 sq ft and the same 45%, and MowerBotLab has published a figure for that one that Husqvarna does not print. Its $3,300 list reads like a different league, but the verified Amazon price is $1,851, close enough to the Greenworks' list that if you want a tested mower and a listing you can buy today, the Husqvarna is a fair argument.
Figures from greenworkstools.com; recall screen: no published CPSC recall names this exact model (screened 2026-09-17) (how we screen, CPSC).
Also worth itMammotion LUBA 3 AWD 3000H
For the steeper yard, on four driven wheels
$2,109 at Amazon, September 17, 202632,670 sq ft lawn, up to80% slope, up toRTK + lidar navigation15.7 in cut width
The Mammotion LUBA 3 AWD 3000H is rated for slopes to 80%, far past anything your ground asks. That is the case for it: buy it if you measured optimistically, if the ground is soft, or if you want the mower to keep its footing rather than merely stay upright. A TechRadar reviewer drove it up a bank too steep for him to walk up unaided. It is also the widest cutter here at 15.7 in with the longest published runtime at 215 min, and its 32,670 sq ft area rating still leaves room over this lawn.
Amazon listing verified as the bare unit at $2,109 on September 17, 2026; the Amazon link goes live with the site.
A half-acre lawn (21,780 sq ft) with a 20% slope and no boundary wire:
- Lawn, up tolawn area limit is 32,670 sq ft; you need 21,780 sq ft us.mammotion.com
- Slope, up toslope limit is 80%; you need 20% us.mammotion.com
- Navigationno boundary wire (RTK + LIDAR) us.mammotion.com
Living with it
The connected side comes with unusually few strings. Mammotion's positioning service is free for the life of the product, the company says, and the mower ships with three years of cellular data on top. The warranty is 3 years, with one condition: Mammotion's US policy covers the battery, motors, sensing modules and both stations, but only if the mower is used in the region where it was bought. It is the loudest pick here at 70 dB, and Mammotion includes a wildlife mode that slows the mower, lights its way and uses no-mow zones to avoid hurting animals at night.
What owners and testers repeat is about the app and the front wheels. A Popular Mechanics tester found the manual driving controls confusing next to a competitor's plain arrows, and a TechRadar reviewer hit occasional connection trouble away from home and with his phone on Bluetooth, plus interface quirks that made fine-tuning zones slow. The same reviewer says the front wheels pick up a lot of mud, though the whole machine can be hosed down. Those front wheels have also been known to tear the grass in soft, shady ground when the mower uses its zero-turn steering; the slower three-point turn reduces it without ending it. That reviewer avoided bald patches himself but knows owners who did not.
- Consumables
- Flip blades at 50 hrs, replace at 150 hrsus.mammotion.com
- What consumables cost
- 24-blade replacement set costs $49us.mammotion.com
- Subscription
- iNavi NetRTK service is free for product lifetimemammotion.com
- Set-up
- No boundary wire, no RTK base station to installus.mammotion.com
- Warranty
- Limited warranty, valid only in region of purchaseus.mammotion.com
What owners and long-term reviewers report, from public threads and published reviews; not our own testing.
- Independent testers agree the LUBA 3 AWD 3000 is a premium, capable mower best suited to large, complex lawns with slopes, and overkill for small yards.techradar.com
- The mower's front wheels tearing up grass and causing bald patches in soft, shady soil is a recurring complaint that goes beyond a single reviewer's own experience.techradar.com
- Automated boundary mapping works well most of the time but is not perfect, occasionally skipping sections of the yard or missing obstacles that then need manual correction.popularmechanics.com
- The Mammotion app's manual driving controls are consistently cited as one of the roughest parts of the ownership experience, even by testers otherwise impressed with the mower.popularmechanics.com
- Once set up, day-to-day reliability is strong: testers report the mower handling installation, mapping, navigation and routine cutting with no major issues over weeks of scheduled use.techradar.com
What independent testers found
We do not test units ourselves. These are figures and verdicts published by named testers, with the maker’s claim beside them where the tester gave it; where a tester relays owners’ reports rather than a measurement, the row says so.
| What | Finding | Tester |
|---|---|---|
| Mapping time | Automated mapping plus manual fixes to add a missed yard section and fence off exposed roots took nearly an hour. | Popular Mechanics |
| Runtime | Mowed a half-acre lawn in about 1 hour 50 minutes with battery power left over. | Popular Mechanics |
| Slope handled | Successfully climbed a slope steep enough that the reviewer could not walk up it unaided, using the app's manual drive controls. (maker: Rated by Mammotion for gradients up to 80% (38.6 degrees)) | TechRadar (Derek Adams) |
| Also noted | On Standard obstacle-avoidance sensitivity it stopped about 3 feet from a stuffed toy obstacle; on Sensitive it detected and avoided a toy only 1 inch tall. | TechRadar (Derek Adams) |
| Also noted | Dual cutting discs gave a measured cutting swath of about 15 inches, letting it cover the lawn faster with fewer passes than a competing single-blade mower. | Popular Mechanics |
| Also noted | Remotely started a mow and watched the mower's live camera feed from over 20 miles away from home. | Popular Mechanics |
- TechRadar wholeheartedly recommends the LUBA 3 AWD 3000 for large, complex lawns with steep slopes, awarding it 4.5 out of 5 stars. (4.5 out of 5 stars) TechRadar (Derek Adams)
- TechRadar says the LUBA 3 AWD 3000's four-wheel-drive bulk and premium price make it overkill for small or simple lawns, and best suited to large, complex properties. TechRadar (Derek Adams)
- Popular Mechanics concludes the LUBA 3 AWD is a smart, efficient, competent robot mower that most buyers will be pleased with, despite rough edges in manual driving and schedule editing. Popular Mechanics
What you give up
Its cut-height ceiling, 4 in, is the same as the other two picks'. This variant will not go below 2.2 in, so if you like your lawn short it is the wrong one. At $2,109 on Amazon it is also the most expensive of the three to actually buy, above the Husqvarna Automower 420 iQ's $1,851, and the slope rating you are paying for is roughly four times what your yard asks. If the ground is firm and the slope is what you measured, the Greenworks is the pick.
Figures from us.mammotion.com; recall screen: no published CPSC recall names this exact model (screened 2026-09-17) (how we screen, CPSC).
The upgradeHusqvarna Automower 420 iQ
The longest warranty of the three picks, plus a tester's edge-slope finding
$1,851 at Amazon, September 17, 202643,560 sq ft lawn, up to45% slope, up toRTK navigation9.4 in cut width
The Husqvarna Automower 420 iQ is rated for 43,560 sq ft and for slopes to 45%, matching the Greenworks on both limits, and it navigates by RTK alone, under the name EPOS, with no camera or laser to fall back on. It carries the longest warranty of the three picks at 4 years, and it lets you draw separate mowing areas and stay-out zones. The argument for the money is that MowerBotLab has put a number on it that Husqvarna does not publish, and that number is about slope at the edge of a lawn, which is where a sloped yard actually fails.
Amazon listing verified as the bare unit at $1,851 on September 17, 2026; the Amazon link goes live with the site.
A half-acre lawn (21,780 sq ft) with a 20% slope and no boundary wire:
- Lawn, up tolawn area limit is 43,560 sq ft; you need 21,780 sq ft husqvarna.com
- Slope, up toslope limit is 45%; you need 20% husqvarna.com
- Navigationno boundary wire (RTK) husqvarna.com
Living with it
The connected side costs nothing extra. Husqvarna builds a long cellular data contract into the machine, so the Connect app carries no ongoing subscription fee, and the warranty behind it runs 4 years, which the company frames as a promise the mower will keep performing season after season. One row in the specifications deserves an asterisk: Husqvarna describes the obstacle detection as radar, and the nearest entry our sheet can carry is ultrasonic, so read that field as an approximation of the maker's word rather than a quote of it.
MowerBotLab's report is the reason to weigh this one against the cheaper picks, but read it in two halves. The 84 min of mowing per charge, the 54 min recharge and the 62 dB of operating noise are the figures Husqvarna already publishes, so take them as confirmed rather than discovered. The reviewer's own finding is the one Husqvarna does not print: the full 45% rating applies inside the mowing area, while the workable slope right at the boundary edge is a fraction of it. On a yard with a slope that is the thing to check before the warranty or the app, because a lawn that falls away steeply at its own edge is where this mower stops.
- Consumables
- Blades recommended replaced about every 2 monthshusqvarna.com
- Subscription
- 10-year data contract included, no extra subscription feehusqvarna.com
- Set-up
- Docking point needs an unimpeded view of the skyhusqvarna.com
- Warranty
- Backed by Husqvarna's 4-Year Warrantyhusqvarna.com
- Camera and data
- Husqvarna says it does not sell geolocation datahusqvarna.com
What independent testers found
We do not test units ourselves. These are figures and verdicts published by named testers, with the maker’s claim beside them where the tester gave it; where a tester relays owners’ reports rather than a measurement, the row says so.
| What | Finding | Tester |
|---|---|---|
| Runtime | 84 minutes of mowing per charge with a 54-minute recharge | MowerBotLab |
| Noise | 62 dB(A) operating noise (maker: Husqvarna states 62 dB(A) on the maker's spec page) | MowerBotLab |
| Slope handled | 45% max slope inside the mowing area, but only 15% right at the boundary edge | MowerBotLab |
| Also noted | Reviewer rates real-world coverage at about 0.5 acre on complex lawns, rising to 1 acre on open, simple layouts | MowerBotLab |
- Bob Vila names the Husqvarna Automower 420iQ one of its picks in a roundup of the best robotic mower brands, pointing to Husqvarna's long track record as a yard-equipment maker. Bob Vila (Timothy Dale)
- MowerBotLab recommends the 420 iQ for buyers who want Husqvarna's reliability and dealer network without trenching a wire, but steers budget-conscious shoppers to a cheaper wire-free rival instead. MowerBotLab
What you give up
Its $3,300 list is the highest of the three, though that is not what it costs: the verified Amazon price is $1,851, below what the Mammotion LUBA 3 AWD 3000H sells for. What you actually give up is deck width. At 9.4 in it cuts the narrowest swath of the three picks, which means more passes over the same half acre and a longer session for the same grass.
Figures from husqvarna.com; recall screen: no published CPSC recall names this exact model (screened 2026-09-17) (how we screen, CPSC).
The first month
The first week is mapping, and it takes longer than the marketing suggests. A Popular Mechanics tester spent the better part of an hour on the Mammotion, running the automatic mapping and then correcting it by hand to add a missed section of yard and fence off exposed roots, longer than mapping the same yard by hand on a competing Husqvarna. A TechRadar reviewer who lived with that mower reported no trouble with installation, mapping or cutting.
After that it settles, though one charge may not cover the lawn. Mammotion prints a coverage figure beside its runtime claim and it is smaller than this yard, so by that arithmetic it docks partway and finishes in a second run. The same tester's machine did better, taking the whole half acre in one session with charge to spare. Either way the yard becomes a schedule rather than a weekend job.
Setting it up
Where the charging station goes matters more than where it looks tidy. The Husqvarna Automower 420 iQ is the most demanding: its docking point needs an unimpeded view of the sky, and Husqvarna says weak satellite coverage there will not be compensated for elsewhere, so a station tucked under the eaves or beneath a tree is a problem you cannot fix in the app. The Mammotion LUBA 3 AWD 3000H asks for nothing extra, joining Mammotion's own positioning network by itself, with no antenna to mount and no reference station to site. The Greenworks AiMowbot C40 needs nothing buried either: its whole boundary is drawn through a guided process in the phone app.
Buying it right
Two of these have a twin in the listings. The Mammotion LUBA 3 AWD 3000H is the high-cutting variant, and Mammotion sells a standard version at the same price under a part number one letter different that cuts below the 2.2 in floor quoted here, so check the letter before you click. Mammotion's compare-at price is $2,799 while the listing we verified sits at $2,109, so a discount may only be the standing price. Husqvarna sells a smaller 410 iQ on the same navigation platform. Match the part number on the box to the maker's page before the price.
Greenworks AiMowbot C40
- “Robotic Lawn Mower Cover Compatible with Greenworks AiMowbot C40 (2026-present), 600D Water Resistant Outdoor Protection Shelter, Automatic Lawn Mower Garage Cover for Yard Robot Mowers”, $32: An accessory or part listing ('compatible with'), not the unit.
- “Greenworks C20Z Wire-Free Robotic Lawn Mower, up to 1/2 Acre, RTKVision Navigation, 24-Degree Slope Climbing, Smart Obstacle Avoidance, App Control with Electric Height Adjustment”, $1,300: a different model that a search for this one returns.
- “Robotic Lawn Mower Cover for Greenworks AiMowbot C40 (2026-present), 600D Water Resistant Outdoor Protection Shelter, Automatic Lawn Mower Garage Cover for Yard Robot Mowers,B”, $46: An accessory or part listing ('cover for'), not the unit.
Mammotion LUBA 3 AWD 3000H
- The listing we verified: “Mammotion LUBA 3 AWD 3000H Robot Lawn Mower with Cleaning Stand (Ship Separately), 360° LiDAR+NetRTK+AI Vision, 5400 sq.ft/h, AWD for 80% Slopes, Cutting Height 2.2"-4.0"”, $2,109 when checked. Brand and full model name in the listing's own title; no bundle, variant or accessory marker.
- “Mammotion LUBA 3 AWD 5000 Robot Lawn Mower, 1.25 Acres, AWD for 80% Slopes”, $3,299: a different model that a search for this one returns.
- “Mammotion LUBA 2 AWD 5000HX Robot Lawn Mower with 4G, Reception 1.25 Acres, Max. 1.48 Acres, All-Wheel-Drive for 80% Slope, UltraSense AI Vision & RTK Automatic Edge Mapping, 2.2"-4.0" Cutting Height”, $2,299: a different model that a search for this one returns.
- “Mammotion LUBA 2 AWD 3000HX Robot Lawn Mower with 4G, All-Wheel-Drive for 80% Slope, Perimeter Wire Free for 0.75 Acre, UltraSense AI Vision & RTK Auto-Mapping, 2.2"-4.0" Adjustable Cutting Height”, $1,998: Listing title carries the model words but not as the name 'LUBA 3 AWD 3000H' (a different model in the same line).
Husqvarna Automower 420 iQ
- The listing we verified: “Husqvarna Automower® iQ Series 420 iQ, Robot Lawn Mower, GPS Robotic Mower”, $1,851 when checked. Listing's own model number is 970727501, matching the maker's part number exactly.
- “Husqvarna Automower® iQ Series 440 iQ, Robot Lawn Mower, GPS Robotic Mower”, $2,650: a different model that a search for this one returns.
- “Husqvarna Automower 430X Robotic Lawn Mower with GPS Assisted Navigation, Automatic Lawn Mower with Self Installation and Ultra-Quiet Smart Mowing Tech for Medium to Large Yards (0.8 Acre), 967852845”, $2,168: a different model that a search for this one returns.
- “Husqvarna 970839403 AM430XH 3200 m² Area Capacity Robotic Lawn Automower (Like New) (Renewed)”, $1,000: Refurbished or used listing.
What this page can’t promise
This page judges the limits each maker publishes against the three inputs you gave it, and a published limit is a promise about a plain lawn rather than a measurement of yours. A mower that clears every limit on paper can still lose to a particular half acre.
Nothing here was tested by us. The tester measurements under each pick are named and linked, and the owner reports are owners' words rather than ours. Where a maker's wording and our spec sheet do not line up we say so under the pick, not the better version. The Greenworks area rating is a translation too, from the acre figure the maker states into the square feet this page compares.
Makers rate area for a plain, open lawn mowed on a schedule, and this page cannot see the obstacles, narrow passages and soft ground that quietly spend that rating on your yard.
The competition
Every robot mower we track was judged against the same house. The verdict column names the maker limit that decided it.
Every unit, judged (15)
| Model | Lawn, up to | Slope, up to | Navigation | Cut width | Zones | Warranty | Price | Verdict |
|---|---|---|---|---|---|---|---|---|
| Greenworks AiMowbot C40 | 43,560 sq ft | 45% | RTK + camera | 12 in | not captured | 3 years | $1,500 list | Clears the published limits |
| Husqvarna Automower 420 iQ | 43,560 sq ft | 45% | RTK | 9.4 in | yes | 4 years | $1,851 list $3,300 | Clears the published limits |
| Husqvarna Automower 435iQ AWD | 56,628 sq ft | 70% | RTK | 8.7 in | yes | 4 years | $5,000 list | Clears the published limits |
| Mammotion LUBA 3 AWD 3000H | 32,670 sq ft | 80% | RTK + lidar | 15.7 in | yes | 3 years | $2,109 list $2,799 | Clears the published limits |
| Sunseeker X7 | 130,680 sq ft | 70% | RTK + camera | 14 in | not captured | not captured | no verified listing | Clears the published limits |
| Husqvarna Automower 410 iQ | 21,780 sq ft | 45% | RTK | 9.4 in | yes | 4 years | $1,830 list $2,600 | Clears them, at a limit lawn area limit is 21,780 sq ft; 21,780 sq ft is within 10% of it husqvarna.com |
| Ecovacs GOAT O1000 RTK | 10,890 sq ft | 45% | RTK + camera | 8.7 in | not captured | not captured | $1,000 | Misses a published limit lawn area limit is 10,890 sq ft; you need 21,780 sq ft ecovacs.com |
| Mammotion LUBA mini 2 AWD 1500 | 16,117 sq ft | 80% | camera | not captured | yes | 3 years | $1,999 list | Misses a published limit lawn area limit is 16,117 sq ft; you need 21,780 sq ft us.mammotion.com |
| Mammotion YUKA mini 2 1000H | 10,890 sq ft | 45% | camera | 7.5 in | yes | 3 years | $1,559 list | Misses a published limit lawn area limit is 10,890 sq ft; you need 21,780 sq ft us.mammotion.com |
| Segway Navimow H210 | 10,890 sq ft | 45% | RTK + lidar | not captured | yes | 3 years | $1,799 list | Misses a published limit lawn area limit is 10,890 sq ft; you need 21,780 sq ft navimow.com |
| Segway Navimow i105N | 5,445 sq ft | 30% | RTK + camera | not captured | yes | 3 years | $799 | Misses a published limit lawn area limit is 5,445 sq ft; you need 21,780 sq ft navimow.com |
| Segway Navimow i110N | 10,890 sq ft | 30% | RTK + camera | not captured | yes | 3 years | $1,099 list | Misses a published limit lawn area limit is 10,890 sq ft; you need 21,780 sq ft navimow.com |
| WORX Landroid Vision AI 1/2 Acre | 8,712 sq ft | 30% | camera | not captured | yes | 3 years | no verified listing | Misses a published limit lawn area limit is 8,712 sq ft; you need 21,780 sq ft worx.com |
| WORX Landroid Vision Cloud 1/4 Acre | 10,890 sq ft | 30% | RTK + camera | 8.7 in | yes | 3 years | no verified listing | Misses a published limit lawn area limit is 10,890 sq ft; you need 21,780 sq ft worx.com |
| eufy E15 | 8,700 sq ft | 32.5% | camera | 8 in | not captured | not captured | $1,300 list $1,800 | Misses a published limit lawn area limit is 8,700 sq ft; you need 21,780 sq ft eufy.com |
What misses a limit (9), and what could not be judged (0)
- Lawn, up to (9). Segway Navimow i105N (lawn area limit is 5,445 sq ft; you need 21,780 sq ft navimow.com); Segway Navimow i110N (lawn area limit is 10,890 sq ft; you need 21,780 sq ft navimow.com); Segway Navimow H210 (lawn area limit is 10,890 sq ft; you need 21,780 sq ft navimow.com); Mammotion LUBA mini 2 AWD 1500 (lawn area limit is 16,117 sq ft; you need 21,780 sq ft us.mammotion.com); Mammotion YUKA mini 2 1000H (lawn area limit is 10,890 sq ft; you need 21,780 sq ft us.mammotion.com); WORX Landroid Vision AI 1/2 Acre (lawn area limit is 8,712 sq ft; you need 21,780 sq ft worx.com); WORX Landroid Vision Cloud 1/4 Acre (lawn area limit is 10,890 sq ft; you need 21,780 sq ft worx.com); Ecovacs GOAT O1000 RTK (lawn area limit is 10,890 sq ft; you need 21,780 sq ft ecovacs.com); eufy E15 (lawn area limit is 8,700 sq ft; you need 21,780 sq ft eufy.com).
Questions people ask
Do I need a boundary wire?
None of these needs one, and none has one in the box. They fix their own position and take the boundary you draw in the app. The Husqvarna Automower 420 iQ is satellite only, so it leans hardest on a clear view of the sky. The Greenworks AiMowbot C40 adds a camera and the Mammotion LUBA 3 AWD 3000H adds a laser scanner as well. Dense tree cover over the lawn is the failure this page cannot predict, so walk the yard and look up first.
How do I measure my lawn's slope?
Percent: rise over run, so ground that climbs one foot for every ten you walk forward is a ten-percent slope. Of the three picks, only Mammotion prints the degree equivalent beside its percent figure, which helps if you used a phone level app. Measure your steepest run, not an average. MowerBotLab also found the Husqvarna holds its full rated slope inside the mowing area but much less right at the boundary edge, so a bank at the very edge is a different question from a steep middle.
What if my lawn is more than one separate area?
The zones input is set to 1, so the judging above assumes one continuous lawn. Raise it and any maker that does not publish multi-zone support comes back as one we cannot judge. Two of the three do: the Mammotion LUBA 3 AWD 3000H supports separate zones with paths between them, and the Husqvarna Automower 420 iQ creates mowing areas and stay-out zones. Greenworks publishes no zone limit, though the app does set zones, pathways and no-go areas, so what is missing is the number, not the feature.
What happens when it rains?
All three publish an answer, but not the same kind of answer. The Greenworks AiMowbot C40 has a rain sensor that pauses mowing automatically. The Mammotion LUBA 3 AWD 3000H lists rain detection. The Husqvarna Automower 420 iQ's entry is an ingress-protection rating, which is a claim about surviving water rather than a claim about stopping for it, and we record it as Husqvarna publishes it rather than upgrading it into something firmer.
Can a robot lawn mower be stolen?
Two of the three answer this. The Greenworks AiMowbot C40 has a PIN code and, while its cellular link is live, an alarm if it leaves its mowing area. The Husqvarna Automower 420 iQ has an alarm and, if it is taken, instant location tracking in its app, and Husqvarna says it does not sell or share the precise location data its products collect. For the Mammotion LUBA 3 AWD 3000H the specs we record list no anti-theft feature, which is not the same as the mower having none.
What upkeep does it need through the year?
Blades are the main running cost. The Mammotion LUBA 3 AWD 3000H's blades should be flipped after a stretch of mowing hours and replaced after three times that, Mammotion says, based on its own testing on Zoysia grass. The Husqvarna Automower 420 iQ wants fresh blades about every couple of months for the best cut and the lowest energy use, according to Husqvarna. Greenworks publishes no blade interval. For winter, only Husqvarna publishes storage advice: bring the mower and its charging station indoors, somewhere dry and above freezing.
Other houses we judged
- Small yardThe best robot lawn mower for a small yard
A small suburban lawn, a gentle grade, and a couple of beds to steer around. Almost every robot mower we track clears a yard this size, so the question stops being which one is big enough and starts being which one is worth what it costs.
- ComparedNavimow vs. Mammotion Luba vs. Worx Landroid
Navimow, Mammotion Luba and Worx Landroid on the area, slope and navigation figures their makers publish, then judged against one quarter-acre yard.
- Inground poolThe best robotic pool cleaner for an inground pool
An inground pool of ordinary size, with walls that need scrubbing as much as the floor does. Every robotic cleaner we track, judged against it on the pool length and wall climbing the makers publish, and then on what independent testers found when they ran the machines.
- Above-ground poolThe best robotic pool cleaner for an above-ground pool
An above-ground pool 24 feet across, on a soft liner, with a wall you can reach over. The maker's own pool-type rating decides this page before anything else gets a say: it rules out 4 of the 13 cleaners judged here on its own.
- Three catsThe best automatic litter box for multiple cats
3 cats, one of them big and one of them small, and one box that has to serve all of them. Two published limits decide it: the number of cats the maker rates the box for, and the weight range its sensors were built around.
- Pet hair, hard floorsThe best robot vacuum for pet hair on hard floors
A shedding dog or two cats, hard floors through most of the house, low thresholds between the rooms, and a wish that the bin emptied itself. Every robot vacuum we track, judged against that house from the limits its maker publishes rather than from a lab's dust-pickup score.
- GuideMeasure before you buy
Every home robot is sold against a limit, and every maker calls that limit something different on its spec page. Here is how to get your own numbers first.
- GuideApps, subscriptions and what stops working offline
Every one of these machines still moves without the internet. What you lose is the map, the schedule, the history and, on some of them, the reason you paid extra.
- GuideRecalls and battery safety for home robots
Five recalls cover every robotic pool cleaner, mower, vacuum and litter box sold in the United States since 2020, and every one of them was about heat.