Compact and portable cleaning independent of power or water supply – the OC 6-18 Premium battery-powered medium-pressure cleaner is ideal for quick and effective intermediate cleaning on the go or around the house. With the gentle flat nozzle, you can quickly remove stubborn dirt from bicycles, camping or garden furniture, toys and much more. The 12-liter water cart with large wheels and extendable telescopic handle also serves as a mobile base for the battery-powered medium-pressure cleaner. If a water connection is available, the device can also be operated without a tank. With the separately available suction hose, you can also use water from wells, buckets or natural bodies of water. The spray gun and spray hose can be attached to the tank for transport. The extensive range of accessories makes the OC 6-18 Premium even more versatile: a foam jet or a washing brush are available separately, for example. The replaceable battery is not included in the scope of delivery and can be used in all battery-powered devices in the 18 V Kärcher Battery Power platform. With real-time technology, the LCD battery display shows the remaining capacity during operation, charging and storage.

FEATURES AND BENEFITS
Self-service and mobile cleaning
The 12-liter water cart allows for self-cleaning on the go. The water is enough for 3 to 5 heavily soiled bicycles or multiple items such as garden/camping chairs.
The tank can be filled from any tap and is leak-proof thanks to the screw cap.
Independent of power supply thanks to battery technology
Optimal mobility thanks to wheels and ergonomic handle height.
The aluminum telescopic handle can be extended for transport and folded back before storage.
Large wheels for safe and comfortable transport over uneven terrain or garden paths.
Practical accessory storage on the device
The hose, trigger gun and spray lance can be easily and safely stored on the device to save space.
The accessory compartment on the back of the water cart offers space for additional accessories.
All accessories are always at hand, even when you're on the go.
Efficient and ideally adjusted medium pressure
Water pressure up to 24 bars for effective and thorough cleaning.
It also cleans sensitive surfaces safely and reliably.
Replaceable 18 V Kärcher Battery Power battery (not included in the standard scope of delivery)
Real-time technology with an LCD display on the battery shows remaining operating time, battery life and battery capacity.
Durability and performance are provided by lithium-ion cells.
Compatible with all devices in the Kärcher Battery Power 18 V battery platform.
Home & Garden app
With the Kärcher Home & Garden app you will become a cleaning expert.

Technical data
Battery-powered device
Battery platform Battery platform 18 V
Pressure (bar) max. 24
Pressure range Medium pressure
Flow rate (l/h) max. 200
Battery type Removable lithium-ion battery
Voltage (V) 18
Capacity (Ah) 2.5
Number of batteries required (Piece(s)) 1
Capacity with full battery (2.5 Ah)
Operating time with full battery (min) max. 12
Charging current (A) 0.5
Weight without accessories (Kg) 5,736
Weight including packaging (Kg) 8.42
Dimensions (L x W x H) (mm) 349 x 321 x 586

Scope of delivery
Option: Battery and charger included
Battery: 18 V / 2.5 Ah Battery Power (1 pc.)
Battery charger: Standard 18 V Battery Power charger (1 pc.)
Flat jet nozzle
Integrated water filter
Garden hose connector adapter A3/4''
Telescopic handle

Equipment
Water suction
Water tank capacity: 12 l
Hose type: Medium pressure flexible hose
Pressure trigger gun: Medium pressure gun with spray gun
Extension tube: short and long

Same summary

The Karcher OC 6-18 Premium Battery Set is a cordless high-pressure cleaner that is primarily intended for those who want to quickly and easily clean various outdoor surfaces anywhere, without the need for an electrical connection. The included 18 V battery allows for immediate use and is particularly convenient for users who do not yet have a compatible battery system. The model without a brushless motor is suitable for occasional, but not intensive daily use, so users with regular, more demanding cleaning tasks may perceive it as less optimal. The cleaner is lightweight and easily portable, which makes it attractive for users on the go, when camping or for a quick wash of bicycles and equipment at home.

Recommendation source: Enaa guides and team experiences.

User view

Typical users of this cleaner are individuals or families who enjoy spending time outdoors, frequently clean bicycles, sports equipment or garden furniture, and appreciate the ability to clean quickly without the constraints of a power cord. It is also often chosen by campers and RV owners for its mobility and ease of use.

Users often trust the Kärcher brand because of its tradition in cleaning technology and a wide range of compatible tools, which makes it easier to upgrade an existing system.

Why buy at Enaa

On Enaa you can quickly check the offer with all the specifications in one place and easily choose the model that best suits your needs, thanks to reviews and user experiences of other customers. The platform allows you to easily compare different cordless cleaners, making your decision easier.

Answers to frequently asked questions

What surfaces is this model best suited for?

This model is best suited for smaller outdoor areas such as patios, garden paths, outdoor furniture, bicycles and sports equipment. Its portability makes it ideal for use at home or on the go, but is less suitable for very large or persistently dirty areas.

Is the cleaner suitable for frequent car washing?

For occasional car washing, the cleaner is perfectly usable. However, for very frequent or intensive car cleaning, we recommend considering a more powerful model or a brushless motor for a longer lifespan.

How long does it last on a single full battery?

The actual duration of use with one full 18 V battery depends on the type and intensity of use, but on average it allows for several cleanings of small areas or one to two moderately long cleaning jobs per charge.

Do I need anything else to get started?

No, the kit already includes a battery, so you can start cleaning right away, without purchasing additional components.

What should I do if I already have a Karcher cordless tool?

If you already use other devices from the Karcher cordless system, you can combine batteries and chargers, which increases the practicality of using multiple tools from the same brand.

Description updated: April 2026