K&K M9300 marten repeller - high voltage, 6 brushes, battery powered 4 x AA up to 18 months, waterproof, for cars, motorhomes and EVs

The K&K M9300 is a marten repeller that works with high voltage only. Six multi-contact brushes placed in the engine bay give the marten a short, harmless electric pulse when it gets under the bonnet. The unit emits no ultrasound, so it does not disturb dogs, cats or other animals at home or near the parking spot. It runs on 4 AA batteries, so it does not draw on the vehicle battery and suits cars that stand for long periods, motorhomes, classic cars, electric cars and plug-in hybrids.

Key features

• 6 movable multi-contact high-voltage brushes +/-, pulse voltage above 250 V
• powered by 4 AA 1.5 V batteries, up to 18 months at an average draw of about 0.16 mA
• low-battery LED warns about 3-4 weeks ahead
• automatic shut-off while driving thanks to a vibration sensor
• no ultrasound, so pets are not disturbed
• waterproof design, E1 approval

The control unit connects to the cable through a compact plug. If needed, you replace only the unit, without removing the cable and brushes.

How the high-voltage brushes work

Each brush has alternating plus and minus strands of stainless steel bristles. The bristles get through the insulating fur and touch the skin, so the pulse acts on a larger area of the body than with plain contact plates. The brushes do not need vehicle ground, so they also work with plastic engine covers. When a marten causes a short circuit, the high-voltage function switches off briefly so the animal can escape. If the brushes are shorted or dirty, the unit reduces its current draw automatically.

Power and batteries

The M9300 runs at 6 V from 4 AA 1.5 V batteries. The average current draw is about 0.16 mA, so one set of batteries lasts up to 18 months. When the low-battery LED starts flashing, you still have about 3-4 weeks to replace them. Use ordinary alkaline batteries. 1.2 V rechargeables do not deliver the required voltage, and 1.5 V rechargeables discharge suddenly, so the LED cannot warn you in time. Batteries are not included.

LED indicators

• the high-voltage LED flashes slowly when the brushes are live
• the vibration LED flashes quickly when the unit has switched off automatically because of vibration
• the battery LED flashes slowly when the batteries are weak

Installation

• the manufacturer recommends installation in a workshop
• clean the engine bay and parking spot before installation, ideally with the marten scent mark remover
• mount the control unit where it cannot overheat, with the LEDs visible and the battery compartment easy to reach
• slide the brushes onto the cable of about 4 m and place them at entry points, paths and spots at risk of bites
• keep at least 10 mm from other conductive parts and mount the brushes at an angle so water can drain
• tightening the screws fixes the plate and taps into the cable, and the cable end must not stick out beyond the last brush
• put the yellow warning sticker in the engine bay

Start-up and checks

• set the switch to OFF and insert 4 AA batteries
• switch to ON and do not touch the brushes or the control unit
• on first start-up the LEDs may begin flashing only after a few minutes
• you can also measure the high voltage with a digital multimeter on the plus strand of a brush
• after disconnecting the plug the brushes carry residual voltage for about 3 minutes

Extension and accessories

The set can be extended by 4 more brushes. As options, the manufacturer offers a bonnet switch with instant discharge, which cuts the voltage when the bonnet is opened, and the M9300-ST replacement control unit.

K&K accessories and other repellers in our shop

• K&K extension kit with 4 high-voltage brushes - to add more protection points to the M9300
• K&K M9700 marten repeller - high voltage plus 360° ultrasound
• K&K M9900 marten repeller - brushes with activation sensors and sleep mode
• K&K M2700 marten repeller - 360° ultrasound on 12 V power
• K&K marten scent mark remover 500 ml - for cleaning the engine bay before installation

Technical data

Manufacturer

K&K Handelsgesellschaft mbH, Gewerbepark Hardtwald 14, 68723 Oftersheim, Germany.