Stihl RMI 422 Robotic Lawnmower

Product Details & Features

The STIHL RMI 422 Robotic Lawnmower is a compact, fully automatic mowing solution designed to keep smaller domestic lawns neat and well maintained with minimal effort. Suitable for lawns of up to 800 m², it combines intelligent mowing technology, automatic charging and efficient mulching to take the hard work out of routine lawn care.

Ideal for homeowners who want a consistently tidy lawn without having to mow manually, the RMI 422 works according to a programmed schedule, automatically managing its mowing and charging cycles to maintain your garden throughout the growing season.

Automatic Lawn Mowing Made Easy

Once installed, the STIHL RMI 422 takes care of your lawn automatically. It follows a programmed mowing schedule, determining when to mow and when to return to its docking station for charging.

Its intelligent operating system adapts mowing and charging times to help maintain the lawn efficiently. If the battery runs low or the mower detects rain, it can return to the docking station before resuming operation when conditions are suitable.

This makes the RMI 422 an excellent choice for homeowners looking to save time and enjoy a well-maintained garden without the regular effort of traditional mowing.

Efficient Mulching for a Healthier Lawn

The RMI 422 features a dedicated mulching cutting system that finely chops grass clippings and distributes them back onto the lawn. These fine clippings decompose naturally, returning valuable nutrients to the soil and helping support healthy grass growth.

The cutting blade automatically changes its direction of rotation after stopping, helping distribute blade wear more evenly. The blade can also be replaced without specialist tools, making routine maintenance straightforward.

Adjustable Cutting Height

The RMI 422 offers a manually adjustable cutting height ranging from 20 to 60 mm, allowing you to tailor the finish to your lawn and the season.

Its 20 cm cutting width is well suited to smaller gardens, while the cutting system is designed to maintain consistent results during regular mowing. Frequent cutting also helps prevent grass from becoming excessively long between mowing sessions.

Intelligent Navigation and Obstacle Detection

The STIHL RMI 422 uses a physical perimeter wire to define its working area. The wire can be installed around the lawn and around obstacles such as flower beds, ponds and other areas that should remain outside the mowing zone.

A guide wire helps the mower navigate back to its docking station. The mower's movable hood incorporates sensors that detect contact with obstacles, prompting it to change direction.

Its adaptive slope-speed function uses an integrated tilt sensor to adjust movement on uneven ground, helping it maintain controlled operation on gradients of up to 35%.

Smart Docking Station and Automatic Charging

The included docking station serves as the mower's charging point and starting location. When the battery needs recharging, the RMI 422 automatically returns to the station before continuing its mowing schedule.

Its intelligent charging system can select a faster or more gradual charging approach according to the mower's operating requirements. The docking station can be positioned within or outside the lawn area, subject to the installation instructions.

Easy Operation and Clear Controls

The RMI 422 features an integrated, high-contrast LCD display that makes it easy to view information and adjust the mower's settings directly on the machine.

Its programmable mowing plan allows you to define the periods during which the mower can operate. Within those periods, the mower manages its mowing and charging activities automatically.

Security and Safety Features

The STIHL RMI 422 incorporates several safety features to help protect people, pets and the machine. Lift sensors stop the cutting system if the mower is lifted during operation, while PIN-code protection helps prevent unauthorised use.

The mower also includes a rain sensor to help manage operation in wet conditions. As with all robotic lawnmowers, children, bystanders and animals should be kept clear of the working area while the mower is operating.

Key Features

Up to 800 m² Working Area – Designed for smaller domestic lawns.

Fully Automatic Mowing – Follows a programmed schedule with minimal user intervention.

Mulching Cutting System – Finely chops grass clippings and returns them to the lawn.

20 cm Cutting Width – Suitable for maintaining smaller garden areas.

Adjustable Cutting Height – Set the cutting height between 20 and 60 mm.

Physical Boundary Wire – Defines the mowing area and protects designated no-go zones.

Obstacle Detection – Sensors in the movable hood detect contact and help the mower change direction.

Slope Capability – Handles gradients of up to 35%.

Adaptive Slope Speed – Adjusts movement according to the mower's position on uneven ground.

Automatic Charging – Returns to the docking station when the battery needs recharging.

Intelligent Charging – Adapts charging according to operating requirements.

Programmable Mowing Plan – Set operating windows to suit your garden and routine.

Rain Sensor – Helps manage mowing activity in wet conditions.

Clear LCD Display – View settings and operating information directly on the mower.

PIN-Code Protection – Helps prevent unauthorised use.

Lift Sensors – Stop the cutting system when the mower is lifted.

Ideal For

• Small domestic lawns up to 800 m²

• Homeowners who want automatic lawn maintenance

• Gardens requiring regular, consistent mowing

• Lawns with gentle to moderate slopes

• Homeowners looking to reduce manual mowing

• Gardens where mulching and natural nutrient recycling are desirable

• Users who prefer straightforward controls and programmed operation

Product Details

Product Type: Robotic Lawnmower
Model: STIHL RMI 422
Working Area Capacity: Up to 800 m²
Installation Type: Physical boundary wire
Cutting Width: 20 cm
Cutting Height: 20–60 mm
Cutting Height Adjustment: Manual
Maximum Slope: 35%
Cutting Speed: 4,450 rpm
Weight: Approximately 9 kg
Battery Type: Lithium-ion
Charging System: Automatic docking station
Cutting System: Mulching blade
Sound Power Level: 60 dB(A)
Protection Rating: IPX4
Display: Integrated LCD control panel
Security: PIN code and lift sensors
Additional Features: Rain sensor, obstacle detection and adaptive slope speed
Installation Accessories: Confirm whether the required installation kit is included with the specific package.

Why Choose the STIHL RMI 422?

The STIHL RMI 422 Robotic Lawnmower offers a convenient way to maintain a smaller lawn without the time and effort associated with regular manual mowing. Its automatic mowing schedule, efficient mulching system and intelligent charging help keep your grass looking neat throughout the growing season.

With adjustable cutting height, obstacle detection and the ability to manage slopes of up to 35%, it is well suited to a variety of domestic gardens. Its integrated LCD display and straightforward programming also make it easy to manage your lawn care routine.

For homeowners seeking a compact, reliable robotic mower that takes care of everyday lawn maintenance, the STIHL RMI 422 is a practical solution.