Segway Navimow vs Husqvarna Automower

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Husqvarna has sold robot mowers for decades and is the name most dealers push. Segway’s Navimow line is much newer, but it went wire-free early and has been pricing big-yard models well below the old guard.

Both brands now sell mowers that work without a buried perimeter wire. That makes the comparison fairer than it used to be. The differences that matter now are how each one finds its way, how wide it cuts, how it handles hills, and what you pay.

I compared the published specs from both makers and what independent reviewers found in long tests. I haven’t owned either mower. I run a metal and composites workshop and look after my own lawn with EGO battery tools, so tools and blades are familiar ground, but everything here is based on the published specs and reviews.

The models I’m comparing

Husqvarna’s US residential range is now the Automower iQ series, launched in spring 2025: the 410 iQ, 420 iQ, 440 iQ and 435 iQ AWD. Older models like the 430X are listed as no longer available on Husqvarna’s US site, and the 430X NERA you see in UK and European reviews isn’t sold here.

On the Navimow side, the X430 is the 1-acre model of the new X4 series. It’s the natural rival to the 420 iQ (also rated for 1 acre) and, on hills, to the 435 iQ AWD.

Specs come from Navimow’s X430 page, Navimow’s buying guide, Husqvarna’s 420 iQ and 435 iQ AWD pages, and the X430 weight from PCWorld’s review.

How they find their way

This is the biggest technical difference, and it decides how well each mower copes with trees, play sets and toys.

Navimow: RTK plus cameras

The X430 uses tri-frequency Network RTK. RTK means satellite positioning corrected by a reference signal, which gets accuracy down to a few centimeters. With Network RTK, that correction comes over the cellular network, so in many areas you don’t need to mount an antenna at all. PCWorld’s tester found Network RTK switched on automatically. Navimow still ships a GNSS antenna in the box for places where the network service doesn’t reach.

On top of RTK, the X430 runs 360° camera vision (VSLAM and VIO). That helps it keep its position when satellite signal gets weak under trees or near the house, and it lets the mower recognize obstacles. Navimow says it detects more than 200 obstacle types.

Husqvarna: EPOS plus radar

Husqvarna’s version of RTK is called EPOS. The 420 iQ and 435 iQ AWD ship with an EPOS reference station you set up in the yard, and Husqvarna says its cloud service can replace the station in select locations. You can also install a physical boundary wire if you prefer, which some owners do on small, heavily shaded lots.

For obstacles, the 420 iQ uses radar and the 435 iQ AWD uses ultrasonic sensors. Neither has a camera. Radar and ultrasonic sensors are good at spotting solid objects like a tree trunk or a lawn chair. They can’t tell a garden hose from a shadow or a toy from a leaf, which is what camera vision tries to do.

In practice: Navimow’s camera system gives it the edge on busy lawns with toys, hoses and pets. Husqvarna’s approach is simpler and doesn’t rely on clean camera lenses, which Techaeris points out need regular wiping on the X430. If you want to understand the systems in more depth, see how robot mowers work.

Cutting width and how they mow

Here the two brands follow different ideas.

The Navimow X430 cuts a 17-inch strip with two cutting discs and 12 pivoting blades, driven by two 180 W motors. It mows in straight lines, much like you would with a push mower. Navimow lists up to 9,600 sq ft per charge.

The Husqvarna 420 iQ cuts 9.4 inches with three pivoting razor blades on a single disc. The 435 iQ AWD cuts 8.7 inches. Husqvarna designs its mowers to run often, a little at a time, with a max active time of 24 hours a day. The idea is that the lawn never gets long, so a small deck is enough.

Both approaches work. But a 17-inch deck covers almost twice the ground per pass, which means fewer hours of mowing per week, less wear on wheels and turf in the same tracks, and more free time on the lawn for kids and dogs.

Look at Husqvarna’s own numbers too: the 420 iQ is rated for 1 acre in systematic mode but only 0.5 acre on an irregular lawn. If your yard has lots of beds, trees and narrow paths, that half-acre figure is the honest one.

Cutting height

The X430 adjusts from 0.75 to 4 inches in quarter-inch steps. The 420 iQ goes from about 1 to 4 inches, electrically adjusted. Both cover the heights most US lawns need.

The 435 iQ AWD tops out at about 2.8 inches. That’s a real limit if you keep a cool-season lawn tall through summer. Check what height your grass type wants in my guide on how to mow a lawn before you consider it.

Slopes and rough ground

The X430 is rated for 84% slopes (40°), with all-wheel drive, dual suspension and articulated steering Navimow calls Xero-Turn. It can cross obstacles up to 2.8 inches high. PCWorld noted it stayed inside a narrow drop-off boundary where a smaller Navimow slipped.

The 420 iQ is a rear-drive mower rated for 45% inside the lawn and 15% at the boundary. That’s fine for gentle grades. It’s not a hill mower.

The 435 iQ AWD is Husqvarna’s answer: 70% inside and 50% at the boundary. That boundary figure matters. The steepest part of many yards is right at the edge, a bank down to the street or a ditch. On paper, the X430 still climbs more, and Navimow doesn’t split its rating into boundary and inside figures, so the numbers aren’t measured the same way.

If hills are your main concern, see my best robot mowers for hills and slopes.

Runtime and charging

• Navimow X430: about 110 minutes, recharge in 90 minutes or less with a 224 W charger.
• Husqvarna 420 iQ: about 84 minutes, recharge in about 54 minutes, 5 Ah battery.
• Husqvarna 435 iQ AWD: about 145 minutes, recharge in about 45 minutes, 8 Ah battery.

Runtime alone doesn’t tell you much. What counts is how much grass gets cut per charge, and the X430’s wider deck covers more ground per minute. Techaeris notes that steep slopes, mud, thick grass and heat all cut runtime, which is true of every robot mower.

The X430 also lets you cap charging at 80% or 90% to help the battery last longer. That’s a sensible feature I’d use.

Noise

Husqvarna lists 62 dB(A) for the 420 iQ and 60 dB(A) for the 435 iQ AWD. Navimow lists the X430 at under 68 dB(A) in lab no-load conditions, and PCWorld cites 60 dB(A).

On paper, Husqvarna is quieter. Either one is far quieter than a gas mower, and quiet enough that night mowing is possible with Husqvarna. Navimow doesn’t recommend mowing in the dark because its cameras need light, according to 9to5Toys’ reviewer.

Weather, size and weight

The X430 is a big machine: about 33.5 x 24 x 13.8 inches and 64 lb. Reviewers at 9to5Toys and Techaeris both say you’ll want a second person to unbox it, and there are no proper carrying handles. Winter storage takes floor space.

Husqvarna’s 420 iQ weighs 38 lb and the 435 iQ AWD about 40 lb. Both are easy for one person to carry into a garage.

For water, the X430 is rated IP66, the 420 iQ IPX5 and the 435 iQ AWD IPX4. Husqvarna says its mowers can be cleaned with a hose. The X430 also has a rain sensor that sends it home when it starts raining.

Setup and the app

Both mowers are mapped in their apps, without wire.

Navimow offers auto-mapping, where the mower drives the edges itself, and manual mapping where you steer it from your phone. PCWorld says Navimow warns against auto-mapping where your lawn blends into a neighbor’s, near pools or near drops. 9to5Toys found manual mapping had a learning curve and redid its first attempt. Expect firmware updates on day one: PCWorld’s two updates added about 20 minutes.

Husqvarna uses its Automower Connect app and Automower Intelligent Mapping. You drive the mower around the yard in the app to set mowing and stay-out areas, then set different schedules and cut heights per area. You also have to place the EPOS reference station somewhere with a clear view of the sky, unless the cloud service covers your area.

Navimow allows up to 120 zones on the X430. Both apps support schedules, no-go zones and remote start.

Theft protection and connectivity

Navimow X430: GPS tracking, Apple Find My, a lift alarm and PIN lock. Built-in 4G with 1 year of free Connect+ service, then $32.90 a year. Network RTK itself is free for life, according to Techaeris. Works with Alexa, Google Home and Home Assistant.

Husqvarna iQ: GPS theft tracking, GeoFence, PIN code and alarm. Cellular, Wi-Fi and Bluetooth on the 420 iQ; Bluetooth and cellular on the 435 iQ AWD. Smart home integration is listed.

Both are well protected. Find My is a nice extra for iPhone owners.

Warranty and service

This is where Husqvarna earns its higher price for some buyers.

Husqvarna lists a 4-year warranty on the iQ mowers. Tractor Supply lists 4 years on the mower and 3 on the battery for the 435 iQ AWD. Husqvarna also includes 1 year of free blades. And Husqvarna sells through dealers who can install, service and winterize the mower.

Navimow lists up to 3 years of warranty on the X4 series. It sells through its own store and big-box stores like Lowe’s, The Home Depot and Walmart, per PCWorld. Service mostly runs through Segway’s support channels.

If you want a local shop to call when something breaks, Husqvarna is the safer choice.

Price

• Navimow X430: around $2,500 list. A bundle with Navimow’s garage shelter runs around $2,850.
• Husqvarna 420 iQ: launched at $3,499.99; Husqvarna’s own page currently shows around $3,300.
• Husqvarna 435 iQ AWD: around $5,000.

For roughly the same rated area, the X430 costs about $800 to $1,000 less than the 420 iQ and half as much as the 435 iQ AWD. Robot mower prices drop during spring and holiday sales, so check my guide on robot lawn mower cost before you buy.

What reviewers found

Navimow X430: PCWorld called it an expensive but capable mower for large, difficult lawns. Techaeris praised the cut quality and all-terrain ability, and listed the weight, the price and signal loss under dense tree canopy as downsides. 9to5Toys found edge awareness strong but had the mower stop where a raised concrete edge met lower grass, and recommends leaving a margin by fences and hard edges and trimming by hand.

Husqvarna iQ: I couldn’t find a long-term independent review of the 420 iQ or 435 iQ AWD that I could read in full, so I’m working from Husqvarna’s published specs here. That’s a gap worth knowing about, given how new the iQ series is.

Who should buy which?

My verdict

For most homeowners with a lawn around an acre, I’d buy the Navimow X430. It cuts nearly twice as wide, climbs steeper ground, sees obstacles with cameras and costs less. The trade-offs are size, weight and a shorter warranty.

I’d pick the Husqvarna 420 iQ for buyers who value a dealer network, a 4-year warranty and a quieter, lighter mower, and who have a fairly open, gentle lawn. The 435 iQ AWD makes sense only if you want Husqvarna and have real hills, and you’re happy with a 2.8-inch height limit.

Still deciding if a robot is right for your yard at all? Read are robot mowers worth it, or see how both brands rank against Mammotion and others in my best robot lawn mowers guide. If Navimow is on your list, my Navimow X4 review goes deeper.