Robot Lawn Mowers
Robomow RK4000
Robomow · MSRP $1,999
Wire-guided autonomy within FM-defined zones, trading systematic mapping simplicity for boundary-infrastructure setup. Random coverage patterns fit mid-size residential yards where owners prioritize ease-of-setup over stripe uniformity.
58
Autonomy42 / 100
30% weight
Reliability70 / 100
25% weight
Maintenance55 / 100
15% weight
Value68 / 100
15% weight
Privacy62 / 100
15% weight
Will the Robomow RK4000 work on your yard?
Pick what matches your setup. The fit updates as you go.
Yard size
Terrain
Grass type
Boundary setup
How Robomow RK4000 holds up
Yard size
Terrain
Grass type
Boundary setup
Consider instead
Specifications
The full spec sheet.
Identity
Manufacturer
Robomow
Model
RK4000
Category
Robot Lawn Mowers
Price
$1,999
Dimensions & weight
Width
22.4 in
Depth
18.9 in
Height
8.7 in
Weight
48.5 lbs
Cleaning performance
Runtime
120 min
Noise
72 dB
Charge time
180 min
Navigation
Mapping
FM boundary-wire guidance with random coverage pattern and bump-sensor obstacle detection.
Battery
144 Wh · Li-ion
Compatibility
Wi-Fi
Wi-Fi
Editorial comparisons
How Robomow RK4000 stacks up.
Common questions
What buyers actually ask.
Operation
Does the RK4000 require line-of-sight operation like remote-controlled mowers?
No. The FM-based boundary-wire system allows fully autonomous operation within the defined perimeter without operator presence. Once scheduled, the mower operates independently and returns to dock when battery depletes.
Ownership
How often does the boundary wire need replacement or repair?
Manufacturer guidelines recommend annual inspection and replacement every 3-5 years depending on climate and soil conditions. Rodent damage and frost heave are primary failure modes. Owner reports from temperate climates indicate wire longevity of 4-6 years with seasonal checking.
Ownership
What is the difference between random coverage and systematic mapping mowers?
Random coverage ensures complete yard coverage but produces variable grass heights and inconsistent stripe patterns. Systematic mapping (GPS or vision-based) creates uniform coverage and stripe patterns but requires more complex setup. The RK4000 prioritizes setup simplicity over aesthetic uniformity.
Operation
Can the RK4000 operate in wet conditions?
No. Manufacturer specifications indicate the device should not operate on wet grass or in rain due to slip risk and electrical safety concerns. This limitation aligns with turf health best practices discouraging mowing when soil is saturated.
Ownership
What blade maintenance is required?
The RK4000 uses replaceable cutting blades requiring replacement every 3-6 months depending on lawn density and debris exposure. Replacement blade sets cost approximately $30-50 and take 10-15 minutes to install.
Other robot lawn mowers we have classified.
II
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Cordless robotic lawn mower relying on buried boundary wire for perimeter containment and probabilistic path…
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Wire-guided systematic mowing up to 1,500 sq m with 45% slope capability and rain-triggered return.…
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IV
Robot Lawn Mowers
Husqvarna Automower 450X NERA
Wire-free robotic lawn mower using EPOS satellite positioning for autonomous systematic coverage across large properties…
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