Husqvarna Automower iQ review: EPOS on an open acre
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If you've got an open acre you mow in systematic passes, the 420 iQ is the Husqvarna we'd read. Husqvarna rates it 1 acre (43,560 sq ft) for systematic mowing and 0.5 acre for an irregular lawn, at 45% (degrees not published). 15% at boundary The cut is 1–4 in.
We'd look elsewhere for a steep bank at the edge, for heavy woods unless you add the wire the maker allows, or if you need an amazon.com listing for an iQ model. The 435X AWD is the boundary-wire model here, and it's the one with a button.
Paid links: see disclosure
There's no Amazon link for this model yet because we couldn't confirm a current amazon.com listing for this exact version.
See Automower 435X AWD on Amazon
Key numbers for your yard
Key numbers for your yard
- Rated area
- 1 acre (43,560 sq ft)The same Husqvarna page says 0.5 acre irregular and 1 acre systematic. The 410 iQ area note is ±20%. Comfortable for about 0.8 acres with trees or two zones. how we size
- Max slope
- 45% (degrees not published), a rise of 4.5 ft over 10 ft15% at boundary
- Passage
- Not publishedBody width isn't published, so we can't tell you the gate width.
- Navigation
- EPOS RTK, Radar or ultrasonic, Boundary wire optionalEPOS can run without a boundary wire. The wire is still an option if your sky is poor.
- Cut
- 1–4 inWarranty 4 years.
Variants
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| Model | Rated area | Max slope | What differs | Status | Amazon |
|---|---|---|---|---|---|
| Automower 410 iQ | 0.5 acres (21,780 sq ft). ±20% | 45% (degrees not published). 15% at boundary | Rated 0.5 acres (21,780 sq ft) with a ±20% note, 45% (degrees not published), 15% at boundary Cut 1–4 in. No confirmed amazon.com listing. | On sale in the US as of Oct 10, 2026. | There's no Amazon link for this model yet because we couldn't confirm a current amazon.com listing for this exact version. |
| Automower 420 iQ | 1 acre (43,560 sq ft). 0.5 acre irregular / 1 acre systematic | 45% (degrees not published). 15% at boundary | The one we'd start with. 0.5 acre if your lawn is irregular, or 1 acre if you mow in systematic passes. 45% with 15% at the boundary. Cut 1–4 in. Warranty 4 years. No confirmed amazon.com listing. | On sale in the US as of Oct 10, 2026. | There's no Amazon link for this model yet because we couldn't confirm a current amazon.com listing for this exact version. |
| Automower 440 iQ | 2 acres (87,120 sq ft) | 45% (degrees not published). 15% at boundary | Rated 2 acres (87,120 sq ft) and 45% (degrees not published). 15% at boundary Cut height isn't published for this model. No confirmed amazon.com listing. | On sale in the US as of Oct 10, 2026. | There's no Amazon link for this model yet because we couldn't confirm a current amazon.com listing for this exact version. |
| Automower 435 iQ AWD | 1.3 acres (56,628 sq ft) | 70% (degrees not published). 50% at boundary | Rated 1.3 acres (56,628 sq ft) and 70% (degrees not published). 50% at boundary Cut 1.2–2.8 in. No confirmed amazon.com listing. | On sale in the US as of Oct 10, 2026. | There's no Amazon link for this model yet because we couldn't confirm a current amazon.com listing for this exact version. |
| Automower 435X AWD (boundary wire) | 0.9 acres (39,204 sq ft) | 70% (degrees not published). 50% at boundary | The wire model. Rated 0.9 acres (39,204 sq ft) and 70% (degrees not published). 50% at boundary Cut 1.2–2.8 in. This one has the Amazon button. | On sale in the US as of Oct 10, 2026. | See on Amazon |
Specs we checked
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| Figure | Published value | Source |
|---|---|---|
| Rated area | 1 acre (43,560 sq ft)0.5 acre irregular / 1 acre systematic. That split is Husqvarna's own figure, so we'd use it rather than our trees-or-zones rule of thumb. | Automower 420 iQ, Husqvarna US, checked Oct 10, 2026. |
| Max slope | 45% (degrees not published)15% at boundary | Automower 420 iQ, Husqvarna US, checked Oct 10, 2026. |
| Navigation | EPOS RTK, Radar or ultrasonic, Boundary wire optional | Automower 420 iQ, Husqvarna US, checked Oct 10, 2026. |
| Cutting height | 1–4 inThe 435 iQ AWD and the 435X AWD publish 1.2–2.8 in, which is a shorter top if you need a tall cut. | Automower 420 iQ, Husqvarna US, checked Oct 10, 2026. |
| Warranty | 4 years | Automower 420 iQ, Husqvarna US, checked Oct 10, 2026. |
| 435X AWD area | 0.9 acres (39,204 sq ft)Slope 70% (degrees not published). 50% at boundary | Automower 435X AWD, Husqvarna US, checked Oct 10, 2026. |
The acre is two numbers
The acre is two numbers, and we'd use the one that matches your lawn. Systematic mowing is the 1 acre figure. An irregular lawn is the 0.5 acre figure on the same Husqvarna page. The 410 iQ is rated 0.5 acres and prints ±20% on that area. Heavy trees or two zones are a separate case on the size guide.
Automower 420 iQ, Husqvarna US; Automower 410 iQ, Husqvarna US, checked Oct 10, 2026.
15% at the boundary
The boundary is the limit that bites, not the headline slope. The 410 iQ, 420 iQ, and 440 iQ publish 45% and limit the boundary to 15%. A bank that's steep only at the edge can miss the mower even when the middle of your lawn is gentler. The 435 iQ AWD and the 435X AWD publish 70% and 50% at the boundary. Degrees aren't published for these models.
Automower 420 iQ, Husqvarna US; Automower 435 iQ AWD, Husqvarna US; Automower 435X AWD, Husqvarna US, checked Oct 10, 2026.
Makers usually publish one maximum slope and don't say whether it applies in the middle of your lawn or at the edge. When a model also gives a lower figure for the edge, that's the one to use there. If your bank runs into a bed or a fence, we'd leave some margin, because edges are usually harder.
Trees and the wire option
If trees cover the path, EPOS can pause, because EPOS is RTK. Owners report pauses under trees. The boundary wire is the option Husqvarna leaves on these models when the sky isn't enough. Radar and ultrasonic aren't a substitute for a clear sky.
Automower 420 iQ, Husqvarna US, checked Oct 10, 2026.
What owners report
In the 4 owner threads we read in October 2026:
- Owners say EPOS pauses and searches under trees, then stops. Thread on EPOS pauses under trees
- Owners describe EPOS lock and setup frustrations, in two threads. One of those also says US phone support fixed a setup problem in about 20 minutes. Thread on EPOS lock · Thread on setup and phone support
- Owners call it reliable on open yards. A 2WD mower sticks in mud and mulch. Thread on open yards and mud
Running costs
Husqvarna doesn't publish an official cellular price on the US pages we used. The Verge reported Automower Connect as free for life. Blade prices aren't published. The cost-to-own guide keeps those lines out of the yearly sum. A theft feature isn't published either.
Honest limits
- If the steep part is at the edge, the 420 iQ boundary limit is 15%.
- If your yard is heavy woods, you'd need the wire assist the maker describes.
- If your lawn is irregular, don't stop at the 1 acre systematic figure.
- If you need an amazon.com listing for an iQ model, those four stay on the plain no-link line.
- If your St. Augustine needs a 4 inch cut, the 435 iQ AWD and the 435X AWD top out at 2.8 in.
Support outlook
Husqvarna is the only robot-mower brand with FCC Conditional Approval, granted Sep 9, 2026 (DA 26-957, FCC Covered List and Conditional Approvals table). Models already authorized can keep receiving updates until at least Jan 1, 2029 (FCC DA 26-789).
The 410 iQ, 420 iQ, 440 iQ, and 435 iQ AWD had no confirmed amazon.com listing on Oct 10, 2026. The 435X AWD listing title was confirmed that day. Oct 13, 2026 did not include a new read of it.
Another open acre
If you want another open acre with a listing, the Navimow X430 is rated 1 acre (43,560 sq ft) and 84%. It doesn't publish a separate 15% boundary figure. Navimow X4 review. WR340 vs X430 is the vision comparison on the same acre.
Questions
Why is there no Amazon button on the 420 iQ?
Is 1 acre the irregular-lawn rating?
Can it climb 45% at the property line?
See these models
The 420 iQ doesn't have an Amazon link we could confirm. The 435X AWD button is the listing we could confirm.
Paid links: see disclosure
There's no Amazon link for this model yet because we couldn't confirm a current amazon.com listing for this exact version.
See Automower 435X AWD on AmazonSee Navimow X430 on AmazonSources
Automower 410 iQ, Husqvarna US, checked Oct 10, 2026.
Automower 420 iQ, Husqvarna US, checked Oct 10, 2026.
Automower 440 iQ, Husqvarna US, checked Oct 10, 2026.
Automower 435 iQ AWD, Husqvarna US, checked Oct 10, 2026.
Automower 435X AWD, Husqvarna US, checked Oct 10, 2026.
amazon.com listing, checked Oct 10, 2026.