RCX 4 robotic lawn mower
The RCX 4 robotic lawnmower mows completely automatically without the need for wires, thanks to GPS, RTK and an AI camera. With all-wheel drive, it effortlessly overcomes even the most difficult terrain and protects the lawn.

The RCX 4 robotic lawnmower mows lawns up to 1,500 square meters fully automatically without wires. GPS, RTK antenna and AI camera enable navigation without boundary wires. Precise positioning enables mowing in parallel tracks and completes the job in the shortest possible time. It intelligently recognizes obstacles such as trees or hedgehogs and avoids them at an optimal distance. The cutting height can be set between 2 and 6 centimeters. The robotic lawnmower maps working areas via the app remote control or artificial intelligence surface recognition. You can set working and prohibited areas. Individual settings for the schedule, driving behavior and much more can be made via the app for additional convenience. The four-wheel drive allows mowing on slopes of up to 60 percent along with particularly gentle turning to protect the lawn. All basic settings can be read and adjusted on the LCD display.

Features and benefits

Navigation with GPS and RTK:
• No boundary wire required, meaning no need for lengthy installation or time-consuming wire adjustments.
• Thanks to communication with satellites and an RTK antenna, it is possible to determine the position with centimeter accuracy to determine precise working areas.
• The mowing area is very easily mapped out using direct remote control of the robotic lawnmower.

AI camera:
• The 3D stereo camera recognizes surfaces such as grass or stone and can therefore independently map the mowing area.
• AI-powered camera intelligently recognizes objects and adjusts driving behavior based on the obstacle. The robotic lawnmower approaches trees and bushes, but maintains a distance from living things.
• If the GPS signal is weak, the camera helps with navigation so that the robotic lawnmower drives efficiently and safely.

Parallel mowing:
• The robotic lawnmower mows in parallel for maximum efficiency. The distance between the tracks can be adjusted.
• To avoid leaving a trail, the robotic lawnmower can change direction or select an adjusted mowing angle after each mowing.

All-wheel drive:
• With three driven wheels, the robotic lawnmower can climb and mow slopes of up to 60 percent.
• On uneven surfaces, the robotic lawnmower can get out of difficult situations.
• Can travel over higher thresholds, e.g. to switch between two areas of different heights.

Gentle turning:
• Wheel interaction with the 360° adjustable rear wheel allows the robotic lawnmower to rotate smoothly and gently to protect the grass.

Rain sensor:
• The robotic lawnmower uses a sensor to detect whether it is raining and then returns to the charging station until the lawn is dry again.
• However, the setting can be adjusted so that the machine still mows in the rain, or the time limit can be adjusted.

LCD display:
• The large LCD display allows you to read the status of the robotic lawnmower from the device at any time.
• Basic settings can be made via the display on the device itself.

Automatic multi-zone schedule:
• The robotic lawnmower creates a customized schedule based on the area and condition, which it then executes regularly.
• You can create different areas between which the robotic lawnmower can switch independently and selectively.
• The schedule can be adjusted, e.g. to avoid driving into a specific mowing area at a specific time of day.

Technical data
• Surface capacity (m2): 1500
• Mower type: Freely oscillating blades
• Number of knives: 3
• Cutting width (cm): 22
• Cutting height (mm): 20 / 60
• Gradeability (%): max. 60
• Mowing application: Mulching
• Navigation technology: GPS / RTK / AI camera
• Camera type: 3D stereo
• Mowing area definition: GPS localization / Grass detection
• Minimum aisle width (cm): 80
• Number of mowing zones (Piece(s)): max. 10
• Battery charging time (min): 75
• Battery type: Lithium-ion battery
• Battery voltage (V): 18
• Battery capacity (Ah): 5
• Charging current (A): 3
• Sound power (dB(A)): 60
• Current type (Ph/V/Hz): 1 / 100 - 240 / 50 - 60
• Color: Black
• Dimensions (L x W x H) (mm): 680 x 420 x 275
• Mowing duration per battery charge (min): 90
• Weight without accessories (Kg): 12.42
• Weight including packaging (Kg): 31

Scope of delivery
• Charging station
• RTK antenna
• Grounding pegs for attaching the charging station: 8 pcs.
• Grounding pegs for attaching RTK antenna: 4 pcs.
• Screws for installing RTK antenna: 4 pcs.
• Mower blades and screws: 9 Piece(s)

Equipment
• Navigation system: Systematic tapes
• Prohibited zones
• Edge cutting function
• Sensor technology: Optical sensor/ Rain sensor/ Lift sensor/ Anti-tilt sensor/ Impact sensor
• LoRa®
• use with the help of the app
• Connection via WLAN
• Bluetooth connection
• smart services/functions in the app
• PIN code lock
• OTA firmware update
• Floating cutting unit
• All-wheel drive
• Screen
• delay due to rain
• Number of wheels: 3 Piece(s)
• Carrying handle
• Theft protection

Same summary

The Karcher RCX 4 robotic lawnmower is primarily suitable for users of medium-sized gardens looking for a reliable solution for areas up to approximately 1500 m ² . Key advantages are advanced navigation functions such as GPS and RTK and an AI camera, which simplify mowing and reduce the need for frequent manual intervention. Due to the operating time of between 60 and 90 minutes and the appropriate charging time, the lawnmower works best where the user prefers regular automated mowing rather than a single longer cycle. It is less recommended for those with very large or completely unusual shaped gardens, where the complexity of the terrain could limit the effectiveness of navigation.

Recommendation source: Enaa guides and team experiences.

User view

Typical users of a robotic lawnmower like the Karcher RCX 4 are homeowners with larger lawns who want a well-groomed lawn without the daily hassle. For many, switching to robotic mowing means more free time and a consistently well-groomed garden. Smart features such as app connectivity and precise navigation are particularly appreciated by those who like to manage their garden remotely or want flexible mowing schedules.

Users often choose Kärcher products because of their reliability and wide selection of accessories, which makes long-term use and maintenance easier.

Why buy at Enaa

At Enaa, you will find professional support and detailed descriptions that make it easier to choose the most suitable robotic lawnmower for your garden. In addition, all important information regarding operation and functionality is clearly presented, so you can make an easier decision based on your method of use.

Answers to frequently asked questions

What size lawn is the Karcher RCX 4 robotic lawnmower suitable for?

The RCX 4 model is best suited to gardens ranging from 1000 to 1500 ^m2 , where it can automatically maintain the lawn in one or more cycles without major breaks.

Is the use of a boundary wire necessary with this model?

The Karcher RCX 4 mostly does not require a classic boundary wire due to GPS and RTK navigation, but sometimes for more complex garden shapes it is advisable to check the recommendations in the instructions.

What is the user experience like with the lawnmower management app?

Most users find the app intuitive, with the ability to control schedules, mowing statistics, and select zones, which can be especially useful for those who want more control over individual parts of the garden.

How often is lawn mower maintenance required?

Basic maintenance is easy and includes occasional cleaning and blade replacement, which the user can do themselves, without special tools or a service visit.

Is the lawnmower suitable for uneven or complex gardens?

The mower offers good navigation even on more varied surfaces, but in very demanding or heavily divided gardens, path optimization may require some additional settings.

Description updated: April 2026