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Design 911 Design 911 supply Porsche parts, Porsche spares and Porsche accessories, to both retail and to the trade. Our Porsche product and accessory range includes brakes, exhausts, tyres, wheels and Porsche panels and interiors. https://www.design91.uk/images/schemaLogo.png https://www.design91.uk/images/schemaLogo.png +443456003478 https://www.design91.uk Facebook Instagram
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Porsche > 993 (911) (1994-1998) > 993 (911) C4S 1994-97 > Motorsport and Off-Road >

Battery Kill Switch

DISPLAYING 1 to 6 (of 6 products)
Rennline battery disconnect switch (4 terminal) - EL-LA4578
3
Rennline battery disconnect switch (4 terminal)
EL-LA4578
Product Information
Product Information
This battery disconnect switch is a 4 terminal style switch for cars with or without an alternator. Its bright red handle makes it easy to find in an emergency.

rennline

6-36 Volt
Prevents battery drain
175 Amp Continuous Rating
1000 Amp Peak.
Rennline Battery Mount Kit Odyssey 925 for Porsche - EL30.35, EL30351
3
Rennline Battery Mount Kit Odyssey 925 for Porsche
EL30.35
Product Information
Product Information
rennline

Fits:
Porsche 911 / 930 / 912 / 996 / 997 / Boxster / Cayman / 991
** except 1969-73

This unit is designed to work with the Odyssey 925 lightweight battery. Other batteries of similar size may also fit, see our battery section for more details.
Note: Switch, remote pull, and battery are not included with this or any of the kits.
Rennline Battery Mount Kit Odyssey 925 for Porsche 914/944/964/993 - EL30.35, EL30351
1
Rennline Battery Mount Kit Odyssey 925 for Porsche 914/944/964/993
EL36.35
Product Information
Product Information
Rennline Battery Mount Kit Odyssey 925

rennline

Fits:
Porsche 914 / 944 / 964 / 993

This unit is designed to work with the Odessey 925 lightweight batteries. Other batteries of similar size may also fit, see our battery section for more details. Note: Switch, remote pull, and battery are not included with this or any of the kits.
Rennline Cup and RS factory style kill switch mount. Porsche 964/993 - EL62
2
Rennline Cup and RS factory style kill switch mount. Porsche 964/993
EL62
Product Information
Product Information
Rennline Cup and RS Factory Style Kill Switch Mount.

rennline

Fits:
Porsche 964
Porsche 993

The growing popularity of the 964/993 cars in today's market is going out of control. Owners are transforming these cars into Cup clones, RS clones and even backdating them into long hood hot rods. The factory style switch mount found on these rare factory cars is unobtainable, forcing owners to fabricate their own, or settle for a non-purist alterative. Due to the demand, Rennline has tooled up to produce exact replicas of these mounts. Each kit comes with (1) switch mount, (1) remote pull cable bracket, primed and ready to install. Although these brackets are intended to be welded like the factory did, many customers choose to install them with screws.

Note: Pictures may not show actual product.
Rennline Kill Switch Mount. Porsche 911/964/993 - EL21, EL61
3
Rennline Kill Switch Mount. Porsche 911/964/993
EL61
Product Information
Product Information
Rennline Kill Switch Mount.
You may also need the pull cable EL21 Works with all Rennline kill switches EL61


rennline  

Fits:
Porsche 911
Porsche 964
Porsche 993

This kill switch mount is specifically designed to attach to the inner fender bolts on all 1965-98 911’s. We have also added extra mounting holes that will allow this bracket to be used in many universal applications. It accepts most standard kill switches and up to 2 remotes pulls that are required in any organized race environment. Constructed from anodized aluminum and TIG welded to create a bullet proof design. Kill switch and remote pulls are sold separately.

Note: Pictures may not show actual product.

Rennline Remote Pull Cable Kit with T- Handle. Porsche 911/964/993 - EL21, EL61
4
Rennline Remote Pull Cable Kit with T- Handle. Porsche 911/964/993
EL21
Product Information
Product Information
Rennline Remote Pull Cable Kit with T- Handle
Works with all Rennline kill switches

Fits:
Porsche 911
Porsche 964
Porsche 993

This item is required by most organized race events. Remote pull kits allow corner worker to easily turn the power off on your car in the case of an emergency. This kit has a T-Handle end that can easily be installed through existing or drilled holes. Kit can also be mounted in dash for easy driver access. Kit Includes 6' red pull cable with handle, power/ off tag, cable end and full installation instructions. Can be used on several different battery disconnect switches.

Note: Pictures may not show actual product.
DISPLAYING 1 to 6 (of 6 products)
About Battery Kill Switch

Battery Kill Switches - Essential Electrical Safety for Motorsport & Off-Road

Battery kill switches provide an immediate way to isolate the vehicle’s electrical system, cutting all power in the event of an emergency. Required by many motorsport regulations and highly recommended for off-road vehicles, kill switches help reduce fire risk, protect electrical components, and allow rapid shutdown during accidents or mechanical failures.

Available from Design911, battery kill switches are designed for reliability, high-current handling, and compliance with motorsport and track-day safety standards.

What Do Battery Kill Switches Do?

Battery kill switches instantly disconnect the battery from the vehicle’s electrical system.

Core Functions:

  • Isolate battery power in emergency situations
  • Reduce fire risk after accidents or rollovers
  • Protect electrical systems during maintenance
  • Meet motorsport and track-day safety requirements
  • Provide external access for marshals where required

They are a vital safety component in performance and competition vehicles.

Why Do Battery Kill Switches Fail?

Kill switches operate under high current loads and harsh environments.

Common Causes of Failure:

  • Contact wear from repeated high-current switching
  • Corrosion or contamination at terminals
  • Poor-quality internal components
  • Incorrect installation or undersized wiring
  • Exposure to moisture, dust, or vibration

A failed switch may not isolate power when required, creating safety risks.

When Should a Battery Kill Switch Be Replaced?

Battery kill switches should be replaced when:

  • Switching action becomes stiff or inconsistent
  • Contacts overheat or show signs of burning
  • Power is not fully isolated when activated
  • Updating to meet current motorsport regulations
  • Preparing a vehicle for competition or inspection

Routine checks and timely replacement ensure dependable operation.

Highlights

  • Motorsport-approved electrical safety components
  • High-current, reliable isolation performance
  • Suitable for track, race, and off-road vehicles
  • Supports regulatory compliance and inspections
  • Essential for safe vehicle operation

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