Robotic lawn mower Karcher RCX 4 — cutting width 22 cm, cutting height 2–6 cm, for lawns up to 1500 m², GPS/RTK/AI camera navigation

Karcher RCX 4 is a robotic lawn mower with a 22 cm cutting width and an adjustable cutting height from 2 to 6 cm, designed for lawns up to 1500 m². The mower combines GPS/RTK positioning with a 3D stereo AI camera for precise navigation and grass detection, supports up to 10 independent mowing zones and works in mulching mode. Powered by an 18 V Li‑Ion battery (5 Ah), it delivers approximately 90 minutes of mowing per charge and returns to charge in about 1.25 hours. Built-in features include a rain sensor, LCD display, freely rotating three-blade cutting system and a maximum slope capability of 60%.

Advantages

The RCX 4 offers mixed-signal navigation that merges satellite accuracy with on-board 3D AI vision to map lawns and detect grass, reducing the need for boundary wires. Its compact 22 cm cutting width and three freely rotating blades provide a fine, consistent mulch that nourishes the turf. A relatively low sound power level of 60 dB(A), fast charging and the capability to manage up to 10 mowing zones make it suitable for varied garden layouts. The unit is lightweight for its class at 12.2 kg, simplifying installation and occasional repositioning.

Suitable for

• Private lawns and medium-sized gardens up to 1500 m²
• Complex lawns with multiple zones, narrow corridors from 80 cm
• Lawns requiring mulching and frequent short cuts for a neat finish

Key specifications

• Cutting width: 22 cm
• Cutting height range: 2–6 cm
• Recommended maximum lawn area: 1500 m²
• Navigation: GPS, RTK and 3D stereo AI camera
• Number of mowing zones supported: up to 10
• Battery: Lithium‑Ion 18 V, 5 Ah
• Mowing time per charge: approx. 90 minutes
• Battery charge time (AC): approx. 1.25 hours
• Cutting system: 3 freely rotating blades
• Maximum slope capability: up to 60%
• Narrowest corridor passable: 80 cm
• LCD display and rain sensor included
• Sound power level: 60 dB(A)
• Dimensions (W×L×H): 539 × 847 × 287 mm
• Weight: 12.2 kg

How to use

Position the charging station on a level surface with adequate access for the mower and connect to mains power following the installation instructions. Define mowing zones using the integrated GPS/RTK system and the mower's app or on-device LCD menu; the 3D stereo AI camera will further refine grass detection during initial runs. Adjust the cutting height between 2 and 6 cm according to season and grass type. Start the mower from the app or the LCD control, and allow it to complete initial mapping runs so navigation and zone boundaries are learned. For charging, the mower will automatically return to its base when battery levels are low or when rain is detected.

Usage recommendations

The mower performs best on regularly maintained turf with obstacles removed. Use mulching mode for frequent short cuts to promote healthy grass; set a slightly higher cutting height for dry or dormant periods. Ensure the charging station remains unobstructed and keep firmware updated via the app to maintain accurate GPS/RTK and AI camera navigation. Dispose of the appliance and batteries at a proper electronic waste collection point.