REASSESSED 2026.08.08

Kärcher

Kärcher RCX 4

Name: Kärcher RCX 4
Brand: Kärcher

GPS/RTK positioning fused with an AI camera plans parallel-track paths across up to 10 zones, no wire required. A PIN code gates every operation and the unit is account-locked against reassignment. EU-market only; no confirmed USD price.

PriceNot listedNot tracked yet

Autonomy Ladder

Why Level III.

One five-rung scale, every category, from acting only on command to working unsupervised anywhere.

VGeneralized AutonomyAny task, any setting. No consumer robot has reached it.
IVEnvironmental AutonomyHandles new obstacles and re-plans in real time; rare in consumer products.
To reach Level IVSustained operation across sessions, including layouts and conditions it has not met before.
IIIConditional AutonomyThis robot

Kärcher RCX 4 finishes whole jobs in a space it already knows, and still needs a person at the edges.
What it does on its own
- Plans and drives parallel-track mowing paths across up to 10 stored zones using GPS/RTK positioning fused with a 3D stereo AI camera; documents lift, anti-tilt, and impact sensors; rain sensor triggers automatic return to dock; PIN-code lock and account-based anti-theft protection; all-wheel drive with a 360-degree flexible rear wheel; AI camera described by the manufacturer as keeping distance from living creatures including hedgehogs.
Why this level
- The RCX 4 plans parallel-track mowing paths across up to 10 stored zones using GPS/RTK positioning fused with an AI camera, deciding its own route and returning to dock on its own, including an automatic return when rain is detected.
- The owner defines mowing areas, no-go zones, and a schedule via the app, consistent with Level III, Conditional Autonomy.
What holds it at Level III
- Requires a PIN code to operate, and the unit is account-locked, unable to be reassigned to a new owner without the prior owner's approval. Automatic rain-triggered return to dock interrupts an in-progress mow. One retailer listing measured 90-minute battery runtime with a 75-minute recharge. Pricing is confirmed only in EUR at EU retailers; no confirmed USD MSRP or US retail availability was found.
5 sources reviewed
IIAssisted AutonomyRuns preset routines; stalls at anything new.
IManual AutomationOne action on command; no independent operation.

How we assign a level →

Behind the classification

Sources we reviewed.

Verified5 sources reviewed

Sufficient public evidence across source types to publish a non-provisional classification.

Sources reviewed

Manufacturer documentation1 sourceReviewed

Kärcher's official RCX 4 product page and press release, used for design, navigation, and safety-sensor claims

Kärcher Robotic lawn mower RCX 4Kärcher International

Press & video reviews1 sourceReviewed

Authorized European retailer listing, used to confirm in-stock shipping status and independently measured battery runtime/charge time

Kärcher RCX 4 – Autonomous cordless robotic mower for 1500 m2Kärcher Store Schreiber

Monitoring record3 sourcesReviewed

Sources behind the tracker entries following this robot.

How we evaluate evidence →

Robovations Score

How this number was reached

57of 100

CapableAt or above 19% of the 355 robots we scoreand 9% of the 79 scored robot lawn mowers

DeficientLimitedCapableStrongExemplary

Measured on 8 of the 9 inputs16% not counted

Our assessment did not establish an independent source for field failure rate on this machine, so that input is left out of the score rather than guessed at, and the rest re-weighted to fill the space. A gap in what we have been able to verify is not evidence against the robot. Where it reaches 30% of the rubric we publish no number at all.

What moved itpoints gained or lost against a typical robot

Carried by

Edge-case recovery55+0.5

Held back by

Software stability46−2.7
Consumables52−1.4
Task completion65−1.1

Capability40% of the score63What it does without you.

Task completion16% of the score65

Evidence

Kärcher documents parallel-track mowing across up to 10 stored zones with automatic dock return; an authorized retailer confirms the unit is in stock and shipping. No independent extended-use review was found to corroborate completion rates across full mowing seasons, and the rain-triggered dock return interrupts a cycle rather than completing it. Scored between the 75 and 50 anchors.

Coverage and navigation10% of the score65

Evidence

GPS/RTK positioning fused with an AI camera supports up to 10 stored zones per the manufacturer, implying map retention between runs. No independent source documents missed-region behavior or long-run coverage consistency, so this rests on manufacturer description.

Edge-case recovery10% of the score55

Evidence

Lift, anti-tilt, and impact sensors are documented, and the rain-triggered return to dock is a confirmed recovery behavior for one specific condition. No source describes general stuck/entrapment recovery beyond these sensor triggers. Scored at the detect-and-halt anchor, credited slightly above that anchor for a confirmed weather-triggered recovery path.

Operating envelope4% of the score68

Evidence

Maximum slope (60%), cutting height range, and all-wheel drive are documented by the manufacturer, and the rain sensor's automatic dock return is itself documented evidence of one condition (rain/wet grass) in which the mower stops rather than continuing. Scored near the 75 anchor's 'holds across common conditions, degrades in one documented condition' description.

Dependability40% of the score50Whether it keeps doing it.

Field failure ratenot countedno source verified52

Evidence

No owner forum, trade repair source, or regulatory record was found. The only independent, non-manufacturer source is a single authorized-retailer listing, and its battery-runtime figure differs somewhat from typical marketing copy, suggesting some independent measurement occurred, but this does not amount to a failure-rate record. Capped by the evidence-availability rule for retail-listing-only evidence; scored below the 65 ceiling given the thinness of the record.

Software stability14% of the score46

Evidence

No version history, release notes, or regression report was found for the Kärcher Home & Garden app or the RCX 4 specifically. Kärcher is an established manufacturer with an existing app platform across its garden-equipment line, which supports the plausibility of an active update mechanism, but no independent evidence of update cadence for this model was located.

Support longevity10% of the score55

Evidence

Kärcher (Alfred Kärcher SE & Co. KG) has a multi-decade record of supporting its power-equipment and garden-tool lines with parts and service, though the robotic-mower line itself (RCX 4, RCX 6) is new as of 2024-2025 with no multi-generation record yet specific to robotic mowers. No stated minimum-term support commitment naming a remedy on breach was found. Scored to reflect the vendor's broader conduct record without crediting a robotic-mower-specific track record that does not yet exist.

Ownership burden20% of the score62What it asks of you.

Routine maintenance12% of the score68

Evidence

Self-docks and self-charges between runs; floating cutting deck adapts to terrain per the manufacturer. Blade-cleaning and replacement cadence are not published, so this is scored on documented self-service dock behavior.

Consumables8% of the score52

Evidence

Replacement blades are a standard consumable for the floating cutting deck design; no price or generic-compatibility statement was found in any source reviewed. Kärcher's broad retail presence makes an established parts channel plausible, but this was not independently confirmed.

middle half of the databaseits medianthis robot

Reported, not scoredneither measures how well the robot works

Five-year costNot costed

Sold in the EU only. The one retail listing found is approximately EUR 2,600 including tax at a German retailer, and no USD price is published. No USD figure is computed by converting a EUR retail price, and blade-replacement cost over five years is not published, so no five-year total is computed.

Data postureCloud-linked

Account required. Maps and telemetry leave the home; core function survives an outage.

What leaves the homeDocumented

Controlled and scheduled through Kärcher's app with PIN-code and account-based anti-theft protection, implying an account and network connection for setup and reassignment. No source reviewed disclosed where GPS/RTK or AI-camera data is processed or stored, or whether scheduled mowing continues without an active app connection once zones are set.

On-device processingYes

Read the full methodology →

FIT CHECK

Will the Kärcher RCX 4 work on your yard?

Describe your yard using the controls. Each choice reads the spec sheet for you, flagging where the Kärcher RCX 4 is built for your space and where it isn’t.

Yard size

Terrain

Grass type

Boundary setup

A classification of fit for the conditions you set, not a recommendation. Verdicts describe engineering design intent, not test results.

SPECIFICATION

The full spec sheet.

Manufacturer-published figures, measured against every robot lawn mowers we track.

Dimensional drawing

Key specificationsManufacturer-published

Footprint: 16.5 × 26.8 in · 10.8 in tall
Weight: 27.3 lbs

Where it lands · ranked across 91 robot lawn mowersThis robotMedianTypical range

Runtime90min

30 min240 min

Near median

Charge time75min

30 min300 min

Near median

Weight27.3lbs

11.9 lbs134 lbs

Near median

Position shows where the figure sits across the tracked category, not a quality judgment.

Official referencesManufacturer site

RECORD

How the assessment has moved.

Every announcement, release and reassessment behind the current classification.

Coming soon

Just launched

Active updates

Settled

Discontinued

Jul 2025 · ReleaseKärcher launches RCX 4 cordless robotic mower with RTK, GPS and AI camera
Aug 2025 · NewsIndependent test flags noise and housing durability issues on Kärcher RCX 4
Aug 2026 · AssessmentRobovations Score recorded at 55 of 100
Aug 2026 · AssessmentRobovations Score rescored under v4.2: 55 → 57

Common questions

What people actually ask.

5 answered

OperationIs the Kärcher RCX 4 available in the US?

Not confirmed. Pricing and retail listings located were EUR-denominated at European retailers; no confirmed USD MSRP or US availability was found.

OperationDoes the RCX 4 need a boundary wire?

No. It uses GPS/RTK positioning fused with a 3D stereo AI camera to plan parallel-track mowing paths without a wire.

OperationDoes rain stop the mower?

Yes. Kärcher documents a rain sensor that automatically triggers a return to the charging dock, interrupting the mowing cycle.

OperationHow is the RCX 4 different from the RCX 6?

The RCX 6 is a larger sibling model covering up to 3,000 sq m, launched separately in the EU in spring 2025. This record covers only the RCX 4, rated to 1,500 sq m.

OperationWhy does the RCX 4 need a PIN code?

Kärcher documents this as anti-theft protection: the unit is account-locked and cannot be reassigned to a new owner without the prior owner’s approval.

Cite / Embed

Reference the Kärcher RCX 4 classification.

Embed the Autonomy Ladder™ mark or copy the citation. The mark is served from this record rather than saved as a file, so it always shows the level we currently hold. If we reassess, it updates on your page by itself.

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Citation

Robovations. "Kärcher RCX 4: Autonomy Level III (Conditional Autonomy)." Autonomy Ladder™, assessed August 2026. https://robovations.com/robots/karcher-rcx-4/

Where to next

Three ways to keep going.

For evaluators

Compare with a peer.

See the Kärcher RCX 4 and Litheli Skope 800 AI-VISION side by side: autonomy level, Robovations Score, readiness, and price. Classification, not a verdict.

See the full comparison

Or compare with HOOKII Neomow X, Goko M6, AIRSEEKERS Tron SE.

For browsers

See every Level III.

Every robot we’ve classified at conditional autonomy. Sorted by readiness, score, and price. Filter by category, manufacturer, or release date.

Browse the database

Updated weekly with new entries and reclassifications.

Kärcher RCX 4

Will the Kärcher RCX 4 work on your yard?

The full spec sheet.

How the assessment has moved.

What people actually ask.

Other robot lawn mowers we have classified.

Litheli Skope 800 AI-VISION

HOOKII Neomow X

Goko M6

AIRSEEKERS Tron SE

Reference the Kärcher RCX 4 classification.

Three ways to keep going.

Get the next reassessment.

Compare with a peer.

See every Level III.