Mower profileVerified data

GARDENA · MowCompass fit profile

GARDENA smart SILENO free 900 m²

Wire-free GARDENA mower for up to 900 m² with GNSS/RTK-based virtual boundaries, LONA smart mapping and dual cutting discs.

recommended lawn900 m²

max slope30%

navigationRTK/GNSS

Fit guidance is based on technical data, not commission.

Fit snapshot

What to know before you buy

The strongest fit signals — and the things worth checking against your own lawn.

Strong fit for

Where this mower fits best

Small-to-medium lawns, with recommended coverage up to 900 m².
Gardens where a boundary-wire-free installation is preferred.
Gardens that need multi-zone mowing support.

Check first

Potential limitations

Navigation is rated “open sky best”, so dense tree cover or nearby buildings are conditions to verify before buying.
Passages should be at least about 100 cm wide according to the specification.
Its terrain rating is moderate, so very uneven or rough ground should be checked separately.
Obstacle avoidance is rated basic, so gardens with many small or frequently changing objects deserve extra attention.

Closest alternatives if a limitation rules it out

Passages from 60 cmHusqvarna Automower 305E NERA900 m² · 30% slope
Handles 45% slopeMOVA LiDAX Ultra 10001,000 m² · 45% slope
Copes with trees and buildingsWORX Landroid Vision Cloud WR310E1,000 m² · 30% slope

Lawn fit analysis

How this mower fits different lawns

Verified technical data translated into practical fit signals for common lawn conditions.

Medium lawns

Recommended coverage is up to 900 m². Treat that as the capacity target, not a guarantee for every lawn layout.

Slope & terrain

The verified core data combines stated max slope 30%, moderate terrain rating. That makes slope and terrain an important part of this mower’s fit profile.

Complex gardens

The specification lists wire-free boundary setup and multi-zone support, which matters most for multiple lawn areas or more complicated boundaries.

Trees & buildings

RTK/GNSS is rated “open sky best”. Dense trees or nearby buildings should therefore be checked in the Finder.

Across the MowCompass library

How it compares with 551 robot mowers

Calculated from the verified specifications of every model in the library, and updated automatically when the data changes.

Noise level57 dB

Quieter than 80% of the 462 models with a published noise level.

Runtime per charge140 min

Runs longer per charge than 70% of the 453 models with a published runtime.

Slope handling30%

Lower slope rating than 83% of the 551 models.

Warranty24 months

Shorter warranty than 77% of the 491 models with a published warranty.

Only verified values are compared; models without published data for a measure are left out of that comparison.

Verified specifications

Specifications by category

Verified product data, grouped so the details that matter are easier to scan.

Lawn & terrain

Recommended lawn area900 m²

Maximum slope30%

Maximum boundary slope15%

Minimum passage width100 cm

Terrain ratingModerate

Multi-zone supportYes

Navigation & obstacle handling

Boundary setupWire-free

NavigationRTK/GNSS

Navigation obstruction toleranceOpen sky best

Obstacle avoidanceBasic

Small-object detectionNo

RTK station requiredNo

Cutting system

Cutting width220 mm

Mowing time per charge140 min

Cutting height25–45 mm

Cutting-height adjustmentManual

Cutting patternRandom

Connectivity & security

Wi‑FiNo

BluetoothYes

GPS trackingYes

CellularNo

PIN protectionYes

App controliOS + Android

Physical details & ownership

Dimensions (L × W × H)630 × 430 × 260 mm

Weight10.8 kg