REASSESSED 2026.08.08Compare

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.

PriceNo list priceRetail price not tracked

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 AutonomyCopes with everyday clutter and frees itself, shown by independent testing.
To reach Level IVIndependent testing shows it avoids ordinary obstacles before contact, copes without the space being cleared, and frees itself when stuck.
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.

Provisional5 sources reviewed

Enough has been reviewed to classify, but gaps remain across source types.

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 →

Human Readiness

Ready Now.

One question: what does buying this robot today walk you into? The state is computed from the record, and recomputed daily.

Ready NowThis robot

Kärcher RCX 4 is on sale, assessed, and nothing on its record argues for waiting.
How this was derived
- Purchasable, but through import channels rather than ordinary US retail.
- A completed assessment, no documented issues on record, and no announced successor on file.
Notes on the record
- Confirmed for sale through the maker's European shop and an authorized regional retailer, but no US pricing, US retail listing, or owner forum documenting real-world reliability surfaced.
- For a US-facing buyer, that is a genuine access gap and an unproven field record.
On the record
- No successor announced
- 5 sources reviewed
What would move it
A documented problem, an announced successor, or a withdrawn listing moves it out; the rating recomputes daily.
New to MarketOn sale under 90 days; the ownership record is still forming.
WaitA successor is announced and has not shipped; re-read the decision when it arrives.
Known IssuesDocumented problems stand on the record; read the case before buying.

How we assess readiness →

Robovations Score

How this number was reached

57of 100

CapableAt or above 18% of the 436 robots we scoreand 9% of the 109 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 a whole pillar has nothing measured, we publish no number at all.

What moved itpoints gained or lost against a typical robot

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

See every robot mower suited to these conditions

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

OWNERSHIP

Living with it.

A documented blade and cleaning regimen from Karcher; independent field evidence is still absent.

Unprovenowner-reported arc

The record so far

The operating manual specifies blade changes every 1 to 2 months, low-pressure rinsing, and 18 to 25 C charging; a rain sensor returns the mower to dock. No owner forum, failure-rate study, or trade repair source was located.

What goes wrong5 documented · 1 self-recover

Common

Blade wearCut quality degrades

Owner fixFit blade set 2.269-705.0, torque 1.0 Nm

Common

Rain interruptionCycle interrupted, returns to dock

Self-recoversNone; mowing resumes per schedule

Occasional

RTK reference disruptionRequires full remapping

Owner fixKeep station fixed; remap if moved

Occasional

Rain sensor false triggersDocks without actual rain

Owner fixRinse the rain sensor clean

Rare

Reduced battery lifespan

Owner fixCharge between 18 and 25 C

Upkeep routine

Weekly52×/yr

Rinse the mowing , housing, wheels, and sensor with a low-pressure hose; Karcher's manual prohibits solvents, immersion, and high-pressure jets.

Monthly12×/yr

Replace all three free-swinging and their screws as a set; Karcher specifies every 1 to 2 months with frequent use, torqued to 1.0 Nm, using blade set 2.269-705.0.

Seasonal4×/yr

Store dry with a full charge in the original packaging over winter; Karcher recommends charging between 18 and 25 C for longevity.

As neededno fixed schedule

Clean the charging contacts and keep 1.5m in front of the station clear; the station is the positioning reference and cannot move without remapping.

Clean the sensor when the mower docks without rain; the manual flags false activation from dirt.

Change the default 0000 PIN (hold START and HOME for 3 seconds); every operation is PIN-gated.

Step-by-step fixes

Wet Grass or Rain Blades Not Spinning or Not Cutting?Won’t Charge or Return to Its Base?All robot mower guides

Safety notes2 cautions · 2 notes

CautionGloves for blade changesKarcher requires protective gloves and full power-off before flipping the mower for blade work.
CautionNo blade-stop timing publishedLift, tilt, and impact sensors are documented; no blade-stop timing test was found.
Night mowing discouragedKarcher advises against night mowing: nocturnal animals plus impaired camera function in darkness.
Change the 0000 PINEvery operation is PIN-gated; the default 0000 should be changed at setup.

SPECIFICATION

The full spec sheet.

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

Dimensional drawing

Key specificationsManufacturer-published

FootprintThe width, depth and height of the robot itself, without its dock.: 16.5 × 26.8 in · 10.8 in tall
WeightThe robot alone, without its dock, as the maker states it.: 27.3 lbs
Max area: 16,146 sq ft (1,500 sq m)
Max slope: 60%
Cutting width: 8.7 in (22cm)
Cutting height range: 0.8-2.4 in (20-60mm)

Where it lands · ranked across 128 robot lawn mowersThis robotMedianTypical range

RuntimeThe maker's stated running time on one charge, at a standard setting.90min

30 min240 min

Near median

Charge timeTime from empty to full on the dock, as the maker states it.75min

30 min300 min

Near median

WeightThe robot alone, without its dock, as the maker states it.27.3lbs

13 lbs134 lbs

Near median

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

Official referencesOwner manual Manufacturer support Product page

RECORD

How the assessment has moved.

Every announcement, release and reassessment behind the current classification.

Coming soon

Just launched

Active updates

Settled

Discontinued

Sep 2026 · AssessmentRecord status: Verified → Provisional
Aug 2026 · AssessmentReadiness reassessed: Promising Progress → Ready Now
Aug 2026 · AssessmentRobovations Score recorded at 57 of 100
Aug 2025 · NewsIndependent test flags noise and housing durability issues on Kärcher RCX 4
Jul 2025 · ReleaseKärcher launches RCX 4 cordless robotic mower with RTK, GPS and AI camera

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.

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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/

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Where to next

Three ways to keep going.

For evaluators

Compare with a peer.

See the Kärcher RCX 4 and Goalker H3 Pro side by side: autonomy level, Robovations Score, readiness, and price. Classification, not a verdict.

See the full comparison

Or compare with Segway Navimow i105N, Husqvarna Automower 410XE NERA, Segway Navimow i2 LiDAR Pro.

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?

Living with it.

The full spec sheet.

How the assessment has moved.

What people actually ask.

Other robot lawn mowers we have classified.

Goalker H3 Pro

Segway Navimow i105N

Husqvarna Automower 410XE NERA

Segway Navimow i2 LiDAR Pro

Reference the Kärcher RCX 4 classification.

Three ways to keep going.

Get the next reassessment.

Compare with a peer.

See every Level III.