Compact and portable cleaning independent of the power supply – the battery-powered medium-pressure cleaner OC 6-18 is ideal for quick and efficient intermediate cleaning on the go or around the house. Simply connect the hose and it is ready to use. The suction hose, which is available separately, means that you can use it on the go, pumping water from wells, cisterns, buckets or natural bodies of water. With the gentle flat nozzle, you can quickly remove stubborn dirt from bicycles, camping or garden furniture, toys and much more. A wide range of accessories expands the areas of application of the OC 6-18: for example, the 5-in-1 Multi Jet for even more cleaning flexibility, the foam jet or the cleaning brush are also available separately. 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. Thanks to innovative real-time technology, the LCD battery display shows the remaining capacity during operation, charging and storage.

Mobile cleaning
Independent of power source thanks to battery technology.
Cleaning is also possible without a water connection, thanks to the suction hose or the 12-liter water tank trolley (available separately).
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.
Accessories are always at hand, even when you're on the go.
A 12-liter water cart is available as an optional accessory.
Home & Garden app
With the Kärcher Home & Garden app you will become a cleaning expert.
Efficient and ideally adjusted medium pressure
24 bar pressure (max.) for effective cleaning.
It gently, safely and reliably cleans even sensitive surfaces.
Flexible hose
Easy handling of the hose.
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.

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) 2.45
Weight including packaging (Kg) 4.526
Dimensions (L x W x H) (mm) 384 x 241 x 204

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
Adapter for garden hose connection A3/4''

Equipment
Water suction
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 Battery Set is a practical cordless high-pressure cleaner that is best suited for quick cleaning of smaller outdoor areas and mobile use. The included battery makes it particularly suitable for users who do not yet have a Karcher cordless system. The 18 V voltage offers relatively good power for washing bicycles, sports equipment, cars or camping, while maintaining high portability and ease of use even without a power outlet. The model does not have a brushless motor, so it is more suitable for occasional use than for more intensive daily cleaning.

Recommendation source: Enaa guides and team experience.

User view

Typical users of this battery-powered cleaner are individuals or families who want to quickly clean their bike after a trip, sports equipment, garden furniture or car even where there is no access to electricity. It is also very useful on the weekend, on the road or while camping, as it is light, compact and ready to use at any time. Thanks to the included battery, you can use it without worry even if you do not yet have other devices of this system.

Many users choose Kärcher products because of their reliability and the tailored range of accessories, which makes it easy to complement the cleaning set according to your needs.

Why buy at Enaa

At Enaa you will find a proven range of cordless high-pressure cleaners for the garden and home, as well as a clear comparison of models based on battery systems and usability for various tasks. In addition, you can easily filter products by important criteria, such as battery voltage or included battery, and get expert advice from our team to choose the most suitable model for you.

Answers to frequently asked questions

What types of cleaning is the OC 6-18 Battery Set best suited for?

The model is designed for quick cleaning of smaller outdoor areas, bicycles, garden furniture, sports equipment and vehicles when you don't have an electrical outlet available or need a portable solution.

Is the battery included and is it compatible with other Karcher devices?

The cleaner comes with an 18 V battery, which you can also use with other compatible Karcher devices in the same system, if you have them.

What does it mean that the model does not have a brushless motor?

Brushless motors are inherently more efficient and durable, so this cleaner with a conventional motor is the best choice for occasional users who don't clean large areas often.

How difficult is it to carry and use on the go?

It is designed for easy portability: it is lightweight and compact, suitable for use outdoors, while traveling or camping.

Description updated: April 2026