Stihl RMI 422
Product description

The robot lawn mower Stihl RMI 422 is suitable for an area of approximately 800 m2 according to the manufacturer’s recommendations. The area size takes into account the mower’s design parameters. The working area is defined by the boundary wire. The mowing method and the mowing movement is random. Continuous information about already mown area is not available. Robot mower returns to the charging station along the wire. The cutting width is 20 cm. The range for cutting height adjustment is from 20 mm to 60 mm. The robot mower Stihl RMI 422 can mow the area of the maximum slope of 20 degrees or 35 percent. The motor of Stihl RMI 422 is designed brushless. The battery capacity is 2.25 Ah, which represents the overall energy of 40 Wh by the system voltage 18 V. The charging time is approximately 90 minutes. The robot mower with the full charged battery can mow for 30 minutes. The mower weight with the battery included is 9 kg. For technical information about Stihl RMI 422 features and other parameters, see Technical specifications or visit manufacturer’s website.

For easy detection of the slope degree, we recommend using a digital spirit-level when selecting a robot mower. It allows you to measure the slope in degrees. To make sure that you correctly identify the maximum slope value on your lawn, it is necessary to measure it at multiple locations and take into account the highest value measured.

Technical specifications
Robot Mower

Product: Stihl RMI 422

Area Size Up to
(specified by the manufacturer):
800 m2

Cutting Width: 20 cm

Cutting Heights Range: 20-60 mm

Blade speed: 4450 rpm

Maximum slope (degrees): 20°

Maximum slope (percent): 35%

Motor Type: brushless


Battery Capacity: 2.25 Ah

System Voltage: 18 V

Number Of Batteries: 1

Battery Total Energy: 40 Wh

Charging Time: 90 min.

Maximum working time: 30 min.


Product Length: 600 mm

Product Width: 430 mm

Product Height: 270 mm

Weight incl. Battery: 9 kg

Guaranteed sound power level: 62 dB(A)

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