Husqvarna
Husqvarna Automower 435X AWD NERA
- Autonomy
- IVEnvironmental
- Score
- 73/100Strong
- Readiness
- Ready Now
- Price
- $4,400list
ComparisonHusqvarna Automower 435X AWD NERA and Husqvarna Automower 420 iQ
Husqvarna
Husqvarna Automower 420 iQ
- Autonomy
- IVEnvironmental
- Score
- Not scored
- Readiness
- Not assessed
- Price
- $3,299.99list
Up to three
Autonomy Ladder
- IManual
- IIAssisted
- IIIConditional
- IVEnvironmental
- VGeneralized
All robot lawn mowers. Every figure below is placed against the whole class, so a gap can be read against how much the class itself varies.
Where each one suits you.
The conditions each robot was assessed against, side by side. Rows marked in gold are where these machines genuinely differ.
| Condition | Husqvarna Automower 4… | Automower 420 iQ |
|---|---|---|
| Yard size | ||
| Under ¼ acre | GoodCapable but exceeds typical small-yard needs; lower-cost wire-guided models handle under-¼-acre equally well. | GoodHusqvarna rates it for 1 acre, four times a quarter-acre lot, so capacity is not a limit. |
| ¼ – ½ acre | GoodOptimal range for NERA deployment; EPOS positioning simplifies boundary setup versus wire on moderate properties. | GoodHalf an acre sits within Husqvarna's rating even for irregular lawns, though no independent test was found. |
| Over ½ acrethey differ | GoodWire-free EPOS excels on large yards; manufacturer documents up to 3,500 m² (0.86 acres) single-zone coverage. | DependsHusqvarna rates 1 acre only for open lawns; irregular lots are rated at half an acre. |
| Terrain | ||
| Mostly flat | GoodOperates reliably on flat terrain; AWD adds no advantage but does not degrade performance. | GoodHusqvarna designs its systematic EPOS mowing around open lawns, though no independent test was found. |
| Gentle slopesthey differ | GoodAWD traction rated to 30% gradient; owner reports describe confident handling of rolling terrain and wet slopes. | DependsHusqvarna rates 45% slopes inside the lawn, but no independent slope test of the 420 iQ was found. |
| Steep / hilly | DependsRated for 30% maximum gradient; traction loss documented above 20% on wet grass; not suitable for cliff-edge properties. | DependsHusqvarna limits slopes at the boundary to 15%, far below its 45% interior rating. |
| Grass type | ||
| Typical lawn grassthey differ | GoodDesigned for standard cool-season and warm-season turfgrass; blade-replacement intervals per manufacturer. | DependsHusqvarna lists a 1-4 inch electric cut height, but no independent cut-quality test was found. |
| Mixed / tall growththey differ | GoodCutting height adjustment documented; tall fescue or overgrown grass increases blade dulling and requires more frequent swaps. | DependsNo independent test of the 420 iQ in long or overgrown grass was found. |
| Thick (Bermuda / Zoysia)they differ | GoodAWD system and robust blade spindles handle dense sod; thick Bermuda and zoysia grass perform normally within cutting height spec. | DependsNo independent test in thick or dense turf was found for its 9.4 inch cut. |
| Boundary setup | ||
| Wireless required | GoodWire-free EPOS positioning is the core feature; this mower is optimized for wireless boundary setups. | GoodEPOS virtual boundaries need no wire, using cloud correction or the included reference station. |
| Wire requiredthey differ | PoorNERA does not support buried perimeter wire; wire-based 435X AWD model is the alternative for wired installations. | GoodHusqvarna lists physical wire as a supported boundary type alongside virtual boundaries. |
| No preference | GoodWire-free EPOS is capable and recommended; no wire-based fallback available for this model if wireless is unavailable. | GoodWith both virtual and physical boundary options, it covers either setup preference. |
A robot being poor for a condition is a fact about fit, not a fault. “Depends” means the record names a limit worth reading, not that the answer is unknown.
How far apart is a long way?
A number only means something next to the spread it sits in. Each track is the real range across every classified robot in the class, with the median marked.
Price94 with a published figure
$4,400$3,299.99
- Husqvarna Automower 435X AWD NERA$4,400
- Husqvarna Automower 420 iQ$3,299.99
$549median $1,999$5,999
Runtime107 with a published figure
145 min84 min
- Husqvarna Automower 435X AWD NERA145 min
- Husqvarna Automower 420 iQ84 min
30 minmedian 100 min240 min
Charge time108 with a published figure
45 min54 min
- Husqvarna Automower 435X AWD NERA45 min
- Husqvarna Automower 420 iQ54 min
30 minmedian 90 min300 min
Noise105 with a published figure
60 dB62 dB
- Husqvarna Automower 435X AWD NERA60 dB
- Husqvarna Automower 420 iQ62 dB
50 dBmedian 60 dB82 dB
Weight120 with a published figure
39.9 lbs38 lbs
- Husqvarna Automower 435X AWD NERA39.9 lbs
- Husqvarna Automower 420 iQ38 lbs
13 lbsmedian 30.4 lbs134 lbs
Height121 with a published figure
13 in11.1 in
- Husqvarna Automower 435X AWD NERA13 in
- Husqvarna Automower 420 iQ11.1 in
7.5 inmedian 11 in16.5 in
What the numbers leave out.
Written on each record, and the only thing here every robot on the site carries.
The trade-off
What each design gives up to be good at what it is good at.
Husqvarna Automower 435X AWD NERA
Wire-free positioning trades a buried cable for a dependency on satellite reception; EPOS needs sky view across the working area, whereas a wire system is self-contained once buried and indifferent to canopy.
At ~$4,400 USD, the NERA is a flagship-tier price point in the consumer mower category; the 70% slope rating and 5,000 m² capacity are what the premium buys, and straight-wire alternatives cost significantly less for flat yards.
Husqvarna Automower 420 iQ
One acre of rated capacity and a 54-minute typical charge, with no independent test yet of the 420 iQ itself.
Husqvarna rates 45% slopes inside the lawn, but only 15% at the boundary.
Who each one is wrong for
Stated by the record itself. A robot being wrong for a household is a fact about fit, not a fault.
Husqvarna Automower 435X AWD NERA
- Owners with wired-mower infrastructure in place
- The 435X AWD NERA is a wire-free upgrade of the wire-based 435X AWD. If perimeter wire is already installed and functioning, the cost and re-tuning effort for EPOS do not justify the switch for maintenance reasons alone.
- Properties under ¼ acre with flat terrain
- Wire-free EPOS positioning and AWD traction target larger, complex properties. Sub-¼-acre flat lawns benefit equally from simpler, lower-cost mowers using boundary wire or GPS.
- Lawns under dense tree canopy
- EPOS is RTK satellite positioning and depends on an unobstructed view of the sky. Heavy overhead canopy is the failure case for satellite-guided mowers, and it is the one situation where a buried boundary wire is the more dependable technology.
- Homeowners requiring sub-3-month autonomous periods
- Manufacturer specs document mowing sessions up to several hours per day; extended winter dormancy (sub-freezing grass) or dense shade may reduce effective coverage windows below seasonal-operation threshold.
Husqvarna Automower 420 iQ
- Buyers who want independent test results first
- Phandroid, Bob Vila, 9to5Toys and Mashable list the 420 iQ in roundups and deal posts; no hands-on test of it was found.
- Irregular lawns close to an acre
- Husqvarna rates its capacity on irregular lawns at half an acre, against 1 acre for open, systematic mowing.
- Lawns with steep slopes along the edges
- Husqvarna rates 45% slopes inside the installation but only 15% at the boundary.
- Buyers who want camera-based obstacle detection
- Husqvarna describes onboard radar paired with virtual boundaries; no camera is listed in its specifications.
What stays your job
The upkeep ownership hands back to you, whatever the autonomy level says.
Husqvarna Automower 435X AWD NERA
- Monthly: Inspect wheels and undersides for matted grass and debris; clean the blade disc and spindles.
- Every 4-8 weeks in season: Replace all three pivoting blades together with their screws (~$20-30 per set). Husqvarna states the blades are not to be sharpened, as sharpening removes the safety coating and can cause breakage on an unattended machine.
- Seasonally (fall/winter): Clean the mower and store it indoors with the Lithium Ion pack charged; a lithium pack is stored charged, not run down.
- As needed: Clean dock charging contacts; software updates via the mobile app.
Husqvarna Automower 420 iQ
- As needed: Replace the three pivoting razor blades; Husqvarna includes a year of blades and 6 extras.
- As needed: Hose-wash the body, which Husqvarna describes as hose-washable.
- As needed: Adjust work areas, stay-out zones and transport paths in the Automower Connect app.
- As needed: Install firmware over the air through the app.
- Seasonally: Update schedules and cutting heights as grass growth changes.
How much each of these is standing on.
Classifications rest on different depths of evidence. A pre-release assessment and a verified one are not the same kind of claim.
| Robot | Evidence status | Sources reviewed | Last assessed |
|---|---|---|---|
| Husqvarna Automower 435X AWD NERA | Provisional | 5 | Sep 2026 |
| Husqvarna Automower 420 iQ | Verified | 8 | Sep 2026 |
Evidence status counts the sources behind a classification, not their kind. A high count can be maker documentation and price coverage, so read it as how much was reviewed rather than as independent testing. How we weigh evidence.
Keep going.
The full recordHusqvarna Automower 435X AWD NERASpecifications, evidence, the Fit Check in full, and every tracked change.
The full recordHusqvarna Automower 420 iQSpecifications, evidence, the Fit Check in full, and every tracked change.Robovations classifies robots; it does not rank them. Nothing on this page is a recommendation, and no manufacturer influences a classification or its placement here.
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