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Husqvarna Automower 420 iQ specifications and in-depth review

Husqvarna Automower 420 iQ

Manufacturer: Husqvarna

The Husqvarna Automower 420 iQ is a robotic lawn mower designed for larger residential lawns, offering a fully autonomous mowing experience with built-in Wi-Fi and Bluetooth connectivity. It supports a dedicated smartphone app and remote control via smartphone, and integrates with both Amazon Alexa and Google Assistant for voice-command operation. The unit features auto docking, scheduled mowing, and a range of environmental sensors including rain, frost, and obstacle detection, allowing it to operate with minimal user intervention.

Covering a recommended area of 4,000 m² at a working capacity of 67 m²/h, the mower handles slopes of up to 25% and offers a cutting width of 24 cm with an adjustable cutting height ranging from 25 mm to 102 mm across three settings. It runs on an 18V, 90W system with a removable battery that reaches a full charge in approximately one hour. The unit weighs 26,762 g and has overall dimensions of 544 mm in width, 752 mm in depth, and 282 mm in height, with an operating noise level of 60 dB, reduced to 56 dB in eco mode.

Pros
  • Covers up to 4,000 m², making it suitable for fairly large residential lawns
  • Includes rain, frost, and obstacle sensors that allow it to operate and adjust autonomously without user input
  • Compatible with both Amazon Alexa and Google Assistant, enabling voice-controlled management
  • Features anti-theft protection, adding a layer of security for an outdoor device
  • Battery charges in just one hour, minimizing downtime between mowing sessions
  • Operates at 56 dB in eco mode, which is relatively unobtrusive for a garden environment
Cons
  • At 26,762 g, the unit is quite heavy, which can make manual repositioning or transport cumbersome
  • Only three cutting height settings offer limited fine-tuning for users who prefer more precise lawn height control
  • A working area capacity of 67 m²/h is modest relative to the 4,000 m² recommended coverage, meaning full lawn cycles can take considerable time
  • The cutting width of 24 cm is narrow, which contributes to the slower overall coverage rate
Who is this for?

This mower is well-suited to homeowners with large residential lawns up to 4,000 m² who want a hands-off mowing routine, as its scheduling capability, auto docking, and weather-adaptive sensors allow it to operate largely without supervision. Users who value smart home integration will appreciate the compatibility with Amazon Alexa and Google Assistant, along with the dedicated smartphone app for remote management. Its ability to handle slopes of up to 25% also makes it a practical choice for gardens with uneven or hilly terrain, where a standard push mower would require more physical effort.

Who is this NOT for?

Users with smaller lawns are unlikely to get proportional value from a machine designed for areas approaching 4,000 m², as its working capacity of 67 m²/h means it is engineered for sustained, long-duration operation rather than quick mowing of compact spaces. Those who need precise grass height control may find the three cutting height settings too limited for their requirements. Additionally, at nearly 27 kg, the unit is not easy to move manually, so anyone who needs to frequently reposition or store the mower in a confined space may find its bulk and weight a practical inconvenience.

General info:

audible noise 60 dB
Has a dedicated smartphone app ✓
supports Wi-Fi ✓
audible noise (eco) 56 dB
Has Bluetooth ✓
cutting width 24 cm
Is electric ✓
height 282 mm
recommended area 4000 m²
supports a remote smartphone ✓
lawn area coverage 4047 m²
thickness 752 mm
volume 115362.816 cm³
weight 26762 g
width 544 mm

The Husqvarna Automower 420 iQ is an electric robotic mower with a recommended coverage area of 4,000 m² and a maximum lawn area capacity of 4,047 m². It features built-in Wi-Fi and Bluetooth connectivity, a dedicated smartphone app, and remote smartphone control, making wireless management straightforward. The unit operates at an audible noise level of 60 dB, dropping to 56 dB in eco mode, and has a cutting width of 24 cm. Physically, it measures 544 mm in width, 752 mm in depth, and 282 mm in height, with a total weight of 26,762 g and a volume of 115,362.816 cm³.

Features:

has an obstacle sensor ✓
Has a rain sensor ✓
can be scheduled ✓
has anti-theft features ✓
auto docking ✓
works with Alexa ✓
compatible with Google Assistant ✓
Has a display ✓
has a frost sensor ✓
Has mulching feature ✓
adapts to weather conditions ✓
works in rain ✓

The mower comes equipped with a broad set of sensors and smart features, including obstacle, rain, and frost detection, and it is capable of adapting to weather conditions while also functioning during rain. It supports scheduled operation and returns to its base automatically via auto docking, with a built-in display for on-device interaction. Anti-theft protection is included, and the unit offers a mulching function for grass clippings. For voice control, it is compatible with both Amazon Alexa and Google Assistant.

Performance:

slope performance 25%
mowing time 75 m
number of cutting height settings 3
maximum cutting height 102 mm
minimum cutting height 25 mm
working area capacity 67 m²/h

In terms of performance, the mower handles slopes of up to 25% and delivers a working area capacity of 67 m²/h with a mowing time of 75 minutes per session. Cutting height is adjustable across three settings, ranging from a minimum of 25 mm to a maximum of 102 mm, allowing for a reasonable degree of flexibility depending on lawn conditions.

Power:

charge time 1 hours
has a removable battery ✓
voltage 18V
wattage 90W

The mower operates on an 18V system with a power output of 90W and features a removable battery that reaches a full charge in approximately one hour, making for a relatively quick turnaround between mowing sessions.

Final Verdict

The Husqvarna Automower 420 iQ is a capable autonomous mowing solution built around a clear purpose: managing large residential lawns with minimal human intervention. Its broad sensor suite, smart home compatibility, and coverage of up to 4,000 m² make it a well-rounded option for homeowners with spacious, potentially sloped gardens who prioritize convenience and automation. That said, its relatively narrow cutting width and limited cutting height increments mean it is not engineered for users who demand highly granular lawn care control. On balance, the 420 iQ delivers a coherent and feature-complete package for its intended use case, and stands as a practical choice for those whose primary goal is reliable, largely unsupervised lawn maintenance at scale.