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Gardena Smart Sileno Max 1200m² specifications and in-depth review

Gardena Smart Sileno Max 1200m²

Manufacturer: Gardena

The Gardena Smart Sileno Max 1200m² is a robotic lawn mower designed for larger garden areas, offering a range of automated features that reduce the need for manual intervention. It connects to a dedicated smartphone app via Bluetooth, allowing users to monitor and adjust mowing sessions remotely. One of its more practical inclusions is automatic weather adaptation, which allows the mower to respond to changing outdoor conditions, including continuing operation during rain.

Weighing 10,300 g and measuring 430 mm in width, the unit handles slopes of up to 30% and covers a maximum lawn area of 1,440 m². Cutting height is adjustable between 25 mm and 45 mm across two settings, while the 18.5V removable battery charges in approximately 1.17 hours. The mower also includes a frost sensor, obstacle detection, auto docking, mulching capability, and scheduling support, rounding out a technically capable feature set for its category.

Pros
  • Handles slopes of up to 30%, making it suitable for gardens with uneven or inclined terrain
  • Equipped with frost, rain, and obstacle sensors that allow it to respond to changing conditions without manual input
  • Supports scheduling and auto docking, enabling largely hands-off operation once set up
  • The removable battery charges in roughly 1.17 hours, minimising downtime between mowing sessions
  • Capable of operating in rain and adapting to weather conditions, reducing interruptions to its mowing schedule
  • Includes a mulching feature, returning cut grass to the lawn without requiring a collection bag
Cons
  • Only two cutting height settings between 25 mm and 45 mm, offering limited precision for lawn height preference
  • No anti-theft features, which is a practical concern for a device that operates outdoors unattended
  • Not compatible with Alexa or Google Assistant, limiting integration with common smart home ecosystems
  • Relies on Bluetooth rather than Wi-Fi for connectivity, which may restrict the range of remote control
  • No onboard display, meaning all interaction depends on the paired smartphone app
Who is this for?

This robotic mower suits homeowners with large garden areas up to 1,200 m² who want a largely automated mowing routine without regular manual involvement. Its built-in frost, rain, and obstacle sensors, combined with scheduling and auto docking, make it a practical fit for users who prefer a set-and-forget approach. The ability to handle slopes of up to 30% also makes it well-suited to gardens with uneven or moderately inclined terrain, where many robotic mowers would struggle.

Who is this NOT for?

Users who rely on smart home voice control will find this mower limiting, as it lacks compatibility with both Alexa and Google Assistant. Those who want fine-grained control over cutting height may also be frustrated by the only two available height settings, which offer little precision beyond a basic adjustment range. Additionally, anyone concerned about leaving equipment outdoors unattended should note the absence of any anti-theft features, making it a less confident choice in areas where security is a priority.

General info:

audible noise 58 dB
Has a dedicated smartphone app ✓
supports Wi-Fi ✕
audible noise (eco) 50 dB
Has Bluetooth ✓
cutting width 22 cm
Is electric ✓
height 260 mm
recommended area 1200 m²
supports a remote smartphone ✓
lawn area coverage 1440 m²
thickness 630 mm
volume 70434 cm³
weight 10300 g
width 430 mm

The Gardena Smart Sileno Max 1200m² is an electric robotic lawn mower with a recommended coverage area of 1,200 m² and a maximum lawn area capacity of 1,440 m². It features built-in Bluetooth and a dedicated smartphone app that enables remote control, though it does not support Wi-Fi. With a cutting width of 22 cm, the unit weighs 10,300 g and measures 430 mm wide, 260 mm tall, and 630 mm in depth, giving it a total volume of 70,434 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 ✓

This robotic mower includes a solid set of automated features, among them an obstacle sensor, a rain sensor, and a frost sensor that together help it respond to varying outdoor conditions — it also adapts to weather and is capable of operating in rain. Scheduling and auto docking are both supported, and the unit offers a mulching function for cutting grass clippings back into the lawn. It does not have a display, lacks anti-theft features, and is not compatible with Alexa or Google Assistant.

Performance:

slope performance 30%
mowing time 50 m
number of cutting height settings 2
maximum cutting height 45 mm
minimum cutting height 25 mm
working area capacity 84.7 m²/h

In terms of performance, this robotic mower handles slopes of up to 30% and delivers a working area capacity of 84.7 m²/h with a mowing time of 50 m. Cutting height is adjustable between 25 mm and 45 mm across two available settings, giving users a basic but functional range for maintaining lawn length to preference.

Power:

charge time 1.17 hours
has a removable battery ✓
voltage 18.5V
wattage 43.37W

The mower runs on an 18.5V removable battery with a power draw of 43.37W, and returns to a full charge in approximately 1.17 hours — a relatively short turnaround that supports consistent automated operation.

Final Verdict

The Gardena Smart Sileno Max 1200m² is a capable robotic mower built around automation and environmental awareness, making it a solid choice for owners of larger gardens who want consistent, low-intervention lawn care. Its combination of frost, rain, and obstacle sensors alongside full scheduling and auto docking means it can manage most conditions independently once configured. The 30% slope handling adds meaningful versatility for non-flat gardens. That said, its limited cutting height adjustment, absence of anti-theft protection, and lack of voice assistant compatibility mean it works best for users whose needs align closely with its strengths rather than those seeking a highly configurable or smart-home-integrated solution. Overall, it represents a well-rounded automated mowing package for its intended coverage range.