For a large lawn of one to two and a half acres, the Segway Navimow X390 is the best-value pick we found: it is rated for 2.5 acres and costs $4,499 on Navimow’s own store, the lowest price per rated acre of any home model we checked. Husqvarna’s Automower 550 EPOS is rated for 10,000 square meters, about 2.5 acres, in its standard mode and up to 15,000 square meters in its maximum mode, and is sold through dealers. For estates, campuses and sports grounds, Husqvarna’s commercial CEORA 546 EPOS is rated for 6 acres and lists at $32,829.94.
Rated area is the number that matters most on a big property, and it is also the number most often misquoted by resellers. So every figure here is the maker’s own rating, and we added the math that spec sheets leave out: price per rated acre, time to cover an acre, and how many charges a big lawn really takes.
Large-Lawn Robot Mowers by Rated Area
We define a large property as a lawn of one acre or more, which is 43,560 sq ft or about 4,047 square meters. The table lists every model we found with an official rated area of at least one acre, along with the price shown on the maker’s own page.
| Mower | Rated lawn area | List price | Max slope | Cutting width |
|---|---|---|---|---|
| Husqvarna CEORA 546 EPOS | 6 acres (spec table, ±20%) | $32,829.94 MSRP | Not listed | 26.8 in |
| Husqvarna Automower 550 EPOS | 10,000 m² standard (about 2.5 acres); 15,000 m² max (about 3.7 acres) | Dealer price | 45% (24°) inside the area | 24 cm (about 9.4 in) |
| Segway Navimow X390 | 2.5 acres | $4,499 (spec table MSRP $4,999) | 50% (27°) | 9.3 in |
| Segway Navimow X350 | 1.5 acres | $2,799 (spec table MSRP $3,499) | 50% (27°) | 9.3 in |
| Mammotion LUBA 3 AWD 5000 | 1.25 acres | $3,299 | 80% (38.6°) | Not listed |
| Dreame A3 AWD Pro 5000 | 1.20 acres | $3,499.99 | 80% (38.7°) | 15.8 in dual-blade deck |
| Segway Navimow X330 | 1.0 acre | $2,299 (spec table MSRP $2,799) | 50% (27°) | 9.3 in |
Navimow shows two prices for each X3 model, a product-card price and a higher MSRP in its spec table, so we list both.
Price per Rated Acre, Calculated
A bigger rated area costs more in total but often less per acre. We divided each official price by its rated area. For the Navimow models we used the lower product-card price, and for the CEORA we used the 6-acre spec-table figure.
| Mower | Price used | Rated acres | Price per acre |
|---|---|---|---|
| Segway Navimow X390 | $4,499 | 2.5 | $1,800 |
| Segway Navimow X350 | $2,799 | 1.5 | $1,866 |
| Segway Navimow X330 | $2,299 | 1.0 | $2,299 |
| Mammotion LUBA 3 AWD 5000 | $3,299 | 1.25 | $2,639 |
| Dreame A3 AWD Pro 5000 | $3,499.99 | 1.20 | $2,917 |
| Husqvarna CEORA 546 EPOS | $32,829.94 | 6 | $5,472 |
Two things stand out from the math. The X390 is the best value per acre among home models, and buying more rated area than you need tends to cost little extra per acre. The CEORA looks expensive per acre, but Husqvarna says it can handle up to 18 acres of regular-quality turf and 12 acres at “Pro Quality,” with 6 acres the figure for sports-grade turf. At 18 acres, its price works out to about $1,824 per acre, close to the X390.
The price you pay also depends on timing. Navimow’s spec table lists higher MSRPs than its product cards, and at the X390’s $4,999 MSRP the cost rises to about $2,000 per rated acre, which still places it at the low end of the group. The gap between the two prices is $500 on the X330 and X390 and $700 on the X350, so a sale can move the per-acre ranking a little, but the 2.5-acre X390 stays the cheapest per acre of the home models at either price.
How Long a Robot Takes to Mow One Acre
Rated area is a weekly or seasonal capacity, not a single-session figure. Robot mowers cut a little at a time, recharge and go back out, so it helps to know how fast each one covers ground.
- Husqvarna Automower 550 EPOS: Husqvarna lists an area capacity of 300 square meters an hour. One acre is about 4,047 square meters, so a full pass over one acre takes about 13.5 hours of mowing, and a full pass over 2.5 acres about 34 hours, spread across the week.
- Mammotion LUBA 3 AWD series: Mammotion lists up to 0.42 acre per charge and 215 minutes of runtime. A 1.25-acre lawn therefore needs about three full charges for one complete pass.
- Segway Navimow X3 series: Navimow lists runtimes of 160, 200 and 240 minutes per charge for the X330, X350 and X390, with recharge times of 65, 80 and 100 minutes. The X350 and X390 have a top mowing speed of 3.3 ft per second.
- Husqvarna CEORA 546 EPOS: Husqvarna says it can maintain up to 6 acres a day.
Planning tip: rated areas assume the mower works most days of the week. If you want the lawn finished in fewer days, or you have trees, beds and paths that slow the robot down, choose a model rated for 25% to 50% more area than your lawn.
Notes on Each Large-Property Mower
Segway Navimow X390: Most Rated Area for a Home Lawn
The X390 is rated for 2.5 acres, mows at up to 3.3 ft per second and carries a 12.8Ah battery. Like the rest of the X3 range, it uses Navimow’s EFLS 3.0 locating system with 300-degree RGB and ToF object detection, so no boundary wire is needed. It handles slopes up to 50% (27 degrees) inside the lawn and 25% at the edges, and its cutting height runs from 2 to 4 inches. Connectivity covers Bluetooth, Wi-Fi and 4G, with five years of free 4G service on this model. Its main limit is the 9.3-inch cutting width, which means many passes on a big lawn.
Husqvarna Automower 550 EPOS: Dealer-Sold, Built for Heavy Use
Husqvarna rates the 550 EPOS for 10,000 square meters in its Standard 48 mode, 5,000 in Sports 24 mode and 15,000 in Max 72 mode, a 24 cm cutting width and electric cutting-height adjustment from 20 to 60 mm. It uses Husqvarna’s EPOS satellite navigation, which needs an EPOS reference station that is not included with the mower, so budget for both. Husqvarna sells it through dealers, who also handle installation.
Mammotion LUBA 3 AWD 5000: For Steep Ground
The LUBA 3 AWD series is all-wheel drive and rated for slopes up to 80%, or 38.6 degrees, the steepest figure on our list together with Dreame. Mammotion’s US store lists the 5000 model at $3,299 for 1.25 acres, with navigation that combines 360-degree LiDAR, network RTK and dual-camera AI vision. Its standard deck cuts from 1.0 to 2.7 inches, and the high-cut version from 2.2 to 4.0 inches. If your large lot includes banks or hillsides, this is the model to look at first.
Dreame A3 AWD Pro 5000: Wide Deck, Steep Slopes
Dreame rates the A3 AWD Pro 5000 for 1.20 acres, with a 10Ah battery, an 80% (38.7 degree) slope limit, a 15.8-inch dual-blade deck and its OmniSense 3.0 3D vision system, at $3,499.99 on its own store. The wide deck is the notable feature: it covers far more ground per pass than the 9.3-inch Navimow blades, which helps on open lawns.
Segway Navimow X350 and X330: Smaller Large Lawns
For lawns of one to one and a half acres, the X350 ($2,799, 1.5 acres) and X330 ($2,299, 1 acre) share the X390’s navigation and slope ratings with smaller batteries and shorter runtimes of 200 and 160 minutes. Our guide to home robots for everyday chores covers the X330 alongside robot vacuums and pool cleaners for typical suburban homes.
Husqvarna CEORA 546 EPOS: Estates, Campuses and Sports Fields
The CEORA is a commercial machine with a 26.8-inch cutting width and an MSRP of $32,829.94. It is rated for 6 acres, and Husqvarna says it can handle up to 18 acres of regular turf. It is wire-free through EPOS. For property managers looking after several large sites, one CEORA can replace a lot of ride-on mowing time; our guide to starting a property management business covers how grounds care fits into management contracts.
Wire-Free Navigation on Big Lots
Every mower on this list works without a buried boundary wire, but they find their position in different ways, and that affects how well they work on your land.
- Satellite RTK and network RTK: The mower compares satellite signals with a correction source to work out its position far more precisely than standard GPS. Husqvarna’s EPOS needs a reference station on your property, while Mammotion’s network RTK draws corrections over the internet. Tall trees and buildings can weaken satellite signals near them.
- Vision and LiDAR: Cameras and laser scanners let a mower recognize edges, obstacles and pets. They help under tree cover, where satellite signals drop, and combine well with RTK.
- Cellular connectivity: On large properties the mower can be far from home Wi-Fi. Navimow builds in 4G with free service for two to five years depending on the model, which keeps app control and theft alerts working at the far end of the lot.
If you prefer that your devices keep working when the internet is down, read each mower’s documentation on offline operation. Our guide to building a smart home without internet access explains which parts of a connected home can run locally.
Picking the Right Size for Your Property
- Measure the mowable area, not the lot. Subtract the house, driveway, beds and wooded areas. A two-acre lot often has well under two acres of grass, and our table of average home sizes by country gives a sense of how much of a lot a typical house takes up.
- Add a buffer. Choose a model rated for 25% to 50% more than your mowable area if you want the lawn finished faster or have many obstacles. Our percentage calculator makes that buffer quick to work out.
- Check the steepest slope. Measure your steepest bank. Above 27 degrees, look at the 80%-rated Mammotion and Dreame models.
- Count separate zones. Front and back lawns joined by a path are fine for most wire-free mowers, but check that the robot can drive the path.
- Plan for coverage. Make sure the far end of the lawn has a usable satellite view, and Wi-Fi or cellular signal if you want app control there.
- Budget the extras. Reference stations, garages, installation and replacement blades add to the sticker price.
Reading Slope Ratings in Percent and Degrees
Slope ratings confuse many buyers because makers mix percent and degrees, and the two are not the same scale. A slope in percent is the rise divided by the run, so a 50% slope climbs 50 feet for every 100 feet you walk across the ground, which works out to about 26.6 degrees. That is why Navimow lists its 50% rating as 27 degrees.
| Slope in percent | Rise over 100 ft of ground | Angle in degrees | Where it appears on this list |
|---|---|---|---|
| 15% | 15 ft | About 8.5° | Husqvarna 550 EPOS limit at the boundary |
| 25% | 25 ft | About 14° | Navimow X3 limit at the boundary |
| 45% | 45 ft | About 24° | Husqvarna 550 EPOS limit inside the lawn |
| 50% | 50 ft | About 26.6° | Navimow X3 limit inside the lawn |
| 80% | 80 ft | About 38.7° | Mammotion LUBA 3 AWD and Dreame A3 AWD Pro |
Notice that the boundary limits are much lower than the inside limits. A lower limit near the edge gives the mower a safety margin, since a machine that slips at the boundary could leave the mowing area, roll into a flower bed or reach a road. If the steepest part of your property runs along a fence, a ditch or a driveway, judge each mower by its boundary figure, not its headline slope rating.
Running a Robot Mower Through a Full Season
A large-lawn robot mower is a machine that works outdoors for hundreds of hours a year, so a little planning keeps it cutting well. Start the season by checking the blades, cleaning the underside of the deck and confirming that the app still has an up-to-date map, since new beds, sheds or play sets need to be added as no-go zones before the first cut.
During the growing season, the main jobs are keeping blades sharp and keeping the charging station clear of leaves and clippings, because a robot that cannot dock cleanly will stop mowing. Cutting a little every day also suits these machines better than long weekly sessions, since their small blades are designed to trim short grass often rather than cut tall grass in one pass. Before winter, follow the maker’s storage advice for the mower and its battery, and bring the base station or reference station in if the instructions say so.
Big-Lawn Robot Mower Questions
Can a Robot Mower Handle 2 Acres?
Yes. The Segway Navimow X390 is rated for 2.5 acres and the Husqvarna Automower 550 EPOS for 10,000 square meters, about 2.5 acres, in standard mode. At Husqvarna’s listed 300 square meters an hour, a full pass over 2 acres takes about 27 hours, spread over several days.
What Is the Largest Robot Lawn Mower for Homes?
Among the home models we checked, the Navimow X390 and Automower 550 EPOS have the largest standard ratings at about 2.5 acres, with the 550 EPOS reaching about 3.7 acres in its Max mode.
Do Robot Mowers Work on Hills?
They do, within the limits each maker publishes. Navimow’s X3 series is rated for 50% (27 degrees), Husqvarna’s 550 EPOS for 45% (24 degrees) inside the lawn, and Mammotion’s LUBA 3 AWD and Dreame’s A3 AWD Pro for 80%.
How Much Does a Robot Mower for a Large Lawn Cost?
Home models rated for one acre or more range from $2,299 for the Navimow X330 to $4,499 for the X390, or about $1,800 to $2,917 per rated acre. Commercial models such as the Husqvarna CEORA 546 EPOS list at $32,829.94.
