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Battery Isolators & Relays

The perfect accessory for installing multiple car batteries in a vehicle. We offer a variety of different battery isolators designed for different battery amp ratings.

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NVX BIR500

500 Amp Relay Isolator (BIR500)

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500 Amp Relay Isolator (BIR500)

• 500 Amp Battery Isolator
• 500 Amps at 12V Continuous
• 700 Amps Surge
• Switching Power: 10 - 16 VDC

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31
Was $89.99 Details
$65.99

In stock

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Price: $65.99

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Stinger SGP35

500 Amp Relay and Isolator

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500 Amp Relay and Isolator

• Prevents Primary Battery Discharge
• Maximum Current Transfer
• Ideal for 2nd Audio Battery Isolation from Vehicle Systems
• 500A Constant/ 900A Peak

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$85.00

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• Prevents Primary Battery Discharge
• Maximum Current Transfer
• Ideal for 2nd Audio Battery Isolation from Vehicle Systems
• 500A Constant/ 900A Peak

SGP35 small

Item added to your cart.

Price: $85.00

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Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7

The Install Bay IB500

500 Amp Battery Isolator and Relay

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500 Amp Battery Isolator and Relay

• Battery Isolator and Relay
• 500 Amp
• Prevents Primary Battery Discharge
• Maximizes the Current Transfer
• Extends Battery Life
• Universal 12V Applications

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35
Was $69.99 Details
$65.99

In stock

• Battery Isolator and Relay
• 500 Amp
• Prevents Primary Battery Discharge
• Maximizes the Current Transfer
• Extends Battery Life
• Universal 12V Applications

IB500 small

Item added to your cart.

Price: $65.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7

Stinger SGP32

200 Amp High Current Power Relay Battery Isolator

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200 Amp High Current Power Relay Battery Isolator

• 200 amp Battery Isolator and Relay
• Prevents primary battery discharge
• Maximum current transfer
• Extends battery life
• Universal 12V Applications

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8
Was $114.00 Details
$62.99

In stock

• 200 amp Battery Isolator and Relay
• Prevents primary battery discharge
• Maximum current transfer
• Extends battery life
• Universal 12V Applications

SGP32 small

Item added to your cart.

Price: $62.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7

NVX XSBI200

Microprocessor-Controlled 200 Amp, Dual Sensing Smart Relay Battery Isolator

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Microprocessor-Controlled 200 Amp, Dual Sensing Smart Relay Battery Isolator

• 200 Amp Battery Isolator
• 200 Amps at 12V Continuous
• 300 Amps Surge
• Switching Power: 10 - 16 VDC

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4
Was $79.99 Details
$54.99

In stock

XSBI200 small

Item added to your cart.

Price: $54.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7

Stinger SGP38

80 amp Battery Isolator and Relay

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80 amp Battery Isolator and Relay

• 80 amp Battery Isolator and Relay
• Prevents Primary Battery Discharge
• Maximum Current Transfer
• Universal 12V Applications
• Extends Battery Life
• Water Resistant Black Phenolic Plastic
• 100,000 Mechanical Cycle Life

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5
Was $39.00 Details
$16.99

In stock

• 80 amp Battery Isolator and Relay
• Prevents Primary Battery Discharge
• Maximum Current Transfer
• Universal 12V Applications
• Extends Battery Life
• Water Resistant Black Phenolic Plastic
• 100,000 Mechanical Cycle Life

NVX XSBI500

Microprocessor-Controlled 500 Amp, Dual Sensing Smart Relay Battery Isolator

XSBI500 big
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Microprocessor-Controlled 500 Amp, Dual Sensing Smart Relay Battery Isolator

• 500 Amp Battery Isolator
• 500 Amps at 12V Continuous
• 700 Amps Surge
• Switching Power: 10 - 16 VDC

Save 10% with coupon
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4
Was $99.99 Details
$74.99

In stock

XSBI500 small

Item added to your cart.

Price: $74.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7

The Install Bay IB200

200 Amp Battery Isolator and Relay

IB200 big
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200 Amp Battery Isolator and Relay

• Battery Isolator and Relay
• 200 Amp
• Prevents Primary Battery Discharge
• Maximizes the Current Transfer
• Extends Battery Life
• Universal 12V Applications

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14
Was $79.99 Details
$46.99

Available

Ships in 10-14 days

• Battery Isolator and Relay
• 200 Amp
• Prevents Primary Battery Discharge
• Maximizes the Current Transfer
• Extends Battery Life
• Universal 12V Applications

IB200 small

Item added to your cart.

Price: $46.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7

Install Bay Battery Isolator Installation Kit (IB1882)

Includes All Necessary Components for a Complete Installation

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Includes All Necessary Components for a Complete Installation

• Complete Battery Isolator Installation Kit
• All Necessary Wiring and Hardware
• 8 AWG Cable
• 50A Light Duty Automotive Reset Breaker

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Was $79.09 Details
$47.99

In stock

Only 1 Left!

• Complete Battery Isolator Installation Kit
• All Necessary Wiring and Hardware
• 8 AWG Cable
• 50A Light Duty Automotive Reset Breaker

IB1882 small

Item added to your cart.

Price: $47.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7

NVX BIR80

80 Amp Relay and Battery Isolator

BIR80 big
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80 Amp Relay and Battery Isolator

• 80 Amp Battery Isolator
• 80 Amps at 12V Continuous
• 150 Amps Surge
• Switching Power: 10 - 16 VDC

Save 10% with coupon
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9
Was $19.99 Details
$14.99

In stock

• 80 Amp Battery Isolator
• 80 Amps at 12V Continuous
• 150 Amps Surge
• Switching Power: 10 - 16 VDC

NVX XSBI80

Microprocessor-Controlled 80 Amp, Dual Sensing Smart Relay Battery Isolator

XSBI80 big
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Microprocessor-Controlled 80 Amp, Dual Sensing Smart Relay Battery Isolator

• 80 Amp Battery Isolator
• 80 Amps at 12V Continuous
• 150 Amps Surge
• Switching Power: 10 - 16 VDC

Save 10% with coupon
shipping truck icon Free shipping in USA. Provide zip for delivery date.

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2
Was $49.99 Details
$24.99

In stock

• 80 Amp Battery Isolator
• 80 Amps at 12V Continuous
• 150 Amps Surge
• Switching Power: 10 - 16 VDC

The Install Bay IB80

80 Amp Battery Isolator and Relay

IB80 big
Go to item page Right Arrow Icon of Right Arrow

80 Amp Battery Isolator and Relay

• Battery Isolator and Relay
• 80 Amp
• Prevents Primary Battery Discharge
• Maximizes the Current Transfer
• Extends Battery Life
• Universal 12V Applications

shipping truck icon Free shipping in USA. Provide zip for delivery date.

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4
Was $29.99 Details
$17.99

In stock

• Battery Isolator and Relay
• 80 Amp
• Prevents Primary Battery Discharge
• Maximizes the Current Transfer
• Extends Battery Life
• Universal 12V Applications

Install Bay IB144CD

GM Delco CS Series Alternator Connection Kit

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GM Delco CS Series Alternator Connection Kit

• Delco CS Series Alternator Kit
• Ensures Safe Installation of Multi-Battery Systems
• Includes Circuit Breaker
• Wire and Hardware Included

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Was $60.79 Details
$27.02

In stock

Only 1 Left!

• Delco CS Series Alternator Kit
• Ensures Safe Installation of Multi-Battery Systems
• Includes Circuit Breaker
• Wire and Hardware Included

Crux REL-SOC

Relay Socket with Leads

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Relay Socket with Leads

• Relay Socket with Leads

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Was $2.95 Details
$1.95

In stock

• Relay Socket with Leads

Install Bay IBSP12023

120 Amp 4-Post Cooper Bussman Battery Isolator

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120 Amp 4-Post Cooper Bussman Battery Isolator

• 120A Four-Post Battery Isolator
• Works for Light Trucks, RVs and Marine Applications
• Solid State Design
• Simple Connection Setup

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Was $157.87 Details
$99.99

Available

Ships in 10-14 days

• 120A Four-Post Battery Isolator
• Works for Light Trucks, RVs and Marine Applications
• Solid State Design
• Simple Connection Setup

IBSP12023 small

Item added to your cart.

Price: $99.99

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7

Crux STPWR-01

Retrofit Performance Solution for Vehicles with "Stop-Start" feature

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Retrofit Performance Solution for Vehicles with "Stop-Start" feature

• Digitally stabilizes voltage to a constant +12V
• For late model vehicles equipped with fuel-saving features
• Engages during the "Stop & Restart" process
• Filters out unwanted fluctuations and voltage interference waves
• Maximum Amperage: 4A
• Dimensions: 3.5"L x 2.5"W x 7"H

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Was $199.95 Details
$123.95

In stock.

• Digitally stabilizes voltage to a constant +12V
• For late model vehicles equipped with fuel-saving features
• Engages during the "Stop & Restart" process
• Filters out unwanted fluctuations and voltage interference waves
• Maximum Amperage: 4A
• Dimensions: 3.5"L x 2.5"W x 7"H

STPWR-01 small

Item added to your cart.

Price: $123.95

Allstate logo

Keep your product protected longer! Extend the warranty after the manufacturer warranty expires. 

  • Mechanical, electrical and product failure covered! 100% parts and labor covered. (Coverage starts after Mfr. warranty)
  • Easy online management! Zero hassle claim service, available 24/7

NVX BIR200

200 Amp Relay Isolator (BIR200)

Go to item page Right Arrow Icon of Right Arrow

200 Amp Relay Isolator (BIR200)

• 200 Amp Battery Isolator
• 200 Amps at 12V Continuous
• 300 Amps Surge
• Switching Power: 10 - 16 VDC

Save 10% with coupon

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12
Was $59.99 Details
$39.99

• 200 Amp Battery Isolator
• 200 Amps at 12V Continuous
• 300 Amps Surge
• Switching Power: 10 - 16 VDC

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    FAQ Frequently asked questions in Battery Isolators & Relays


    Battery Isolators & Relays Frequently Asked Questions (FAQ)

    A battery isolator in car audio is a device that allows multiple batteries to be connected in a vehicle, ensuring that the starting battery remains charged while the secondary battery supplies power to the audio system. Here's how it works and its benefits:

    1. Separation of Batteries: A battery isolator separates the vehicle's starting battery from the secondary or auxiliary batteries. This ensures that the power used by the audio system doesn't drain the starting battery.

    2. Simultaneous Charging: When the vehicle's engine is running, the alternator charges the starting battery. Once the starting battery is fully charged, the isolator directs the charging current to the secondary batteries. This ensures all batteries are charged efficiently without overcharging.

    3. Prevents Drain on Starting Battery: High-powered audio systems can draw significant power, especially with amplifiers and subwoofers. By having a separate battery for the audio system, you prevent the main starting battery from being drained. This ensures that the vehicle can always start even after prolonged use of the audio system when the engine is off.

    4. Extended Battery Life: By ensuring that no single battery is overly discharged, battery isolators can help extend the lifespan of the batteries.

    5. Enhanced Audio Performance: Some car audio enthusiasts believe that by having a dedicated battery for the audio system, it can deliver cleaner power to the audio components, potentially improving sound quality.

    6. Safety: In the event of a short circuit or an issue with the audio system, the isolator ensures that the starting battery remains unaffected, allowing the vehicle to be started and moved if necessary.

    A battery isolator works as a one-way valve for electrical current, allowing power to flow from the vehicle's charging system to the auxiliary batteries but preventing it from flowing back to the primary battery. When the engine is running and the alternator is producing electricity, the battery isolator detects the voltage increase and engages the connection between the primary and auxiliary batteries, allowing them to charge simultaneously. Once the engine is turned off, the battery isolator disengages the connection between the batteries, ensuring that the primary battery remains isolated and retains its charge. This way, even if your auxiliary accessories draw power from the second battery, your vehicle's main battery remains fully charged and ready to start the engine when needed.
    While some experienced DIY enthusiasts may be able to install a battery isolator themselves, it's recommended to seek professional help, especially if you're not familiar with automotive electrical systems. Proper installation is crucial for the safe and efficient operation of your battery isolator and electrical components. Professional installation ensures that the battery isolator is correctly connected to the charging system, batteries, and accessories, preventing any electrical issues or safety hazards. Additionally, a professional installer can provide guidance on selecting the right type and capacity of battery isolator for your specific vehicle and power requirements. Remember that working with electrical systems can be dangerous if not done correctly. Professional installation gives you peace of mind that your battery isolator is installed properly, providing optimal performance and protection for your vehicle's electrical system.
    While both battery isolators and voltage-sensitive relays (VSRs) serve a similar purpose of charging multiple batteries from a single charging source, they differ in their operation and design. A battery isolator is a diode-based device that allows power to flow in one direction only. It maintains electrical isolation between the primary and auxiliary batteries, ensuring that they do not discharge power between each other. A diode-based isolator typically has a fixed voltage drop, meaning that a small amount of voltage is lost during the charging process. On the other hand, a voltage-sensitive relay (VSR) is an electronically controlled device that engages or disengages the connection between batteries based on their voltage levels. When the vehicle's charging system produces a sufficient voltage, the VSR connects the batteries, allowing them to charge together. When the engine is turned off, and the voltage drops, the VSR disconnects the batteries, preventing any drain from the auxiliary battery to the main battery. VSRs are generally more efficient in terms of voltage loss compared to diode-based isolators. The choice between the two depends on your specific needs and preferences.
    Using a battery isolator with lithium-ion (Li-ion) batteries requires careful consideration and compatibility. Unlike traditional lead-acid batteries, Li-ion batteries have different charging requirements and voltage characteristics. Many standard battery isolators are designed for lead-acid batteries and may not be suitable for Li-ion batteries due to their unique charging needs. Li-ion batteries require specific charging profiles to ensure their longevity and safety. If you plan to use Li-ion batteries in your vehicle's dual battery setup, it's essential to choose a battery isolator specifically designed and rated for use with Li-ion batteries. These isolators will provide the appropriate charging profile and protection for your Li-ion batteries, ensuring their optimal performance and safety. Always refer to the manufacturer's specifications and recommendations for both the battery isolator and Li-ion batteries to ensure compatibility and proper operation. If you have any doubts or questions, consult with a knowledgeable professional to select the right components for your setup.

    All About Battery Isolators & Relays


    Looking for reliable circuit breakers to protect your car's electrical system? Look no further! Sonic Electronix offers a wide selection of premium circuit breakers that provide enhanced safety and performance. Explore our collection now to find the best quality circuit breakers that ensure optimal protection for your vehicle's electronics. Upgrade your car's electrical setup with our trusted circuit breakers from leading brands. Secure your vehicle's electrical components today!

    Circuit breakers are essential components that protect your car's electrical system from overload and short circuit conditions. They act as automatic switches that trip when excessive current flows through the circuit, interrupting the power supply and preventing damage to sensitive electronics. Some key advantages of incorporating high-quality circuit breakers in your vehicle's electrical setup include:

    Enhanced Safety: Circuit breakers offer a safer alternative to fuses as they can be easily reset after tripping, eliminating the need for replacements.

    Continuous Protection: Once tripped, circuit breakers can be manually reset, ensuring uninterrupted power flow after the underlying issue is resolved.

    Versatility: Circuit breakers are available in various amperage ratings and configurations, making them suitable for different applications and devices.

    Cost-Effectiveness: Unlike fuses that need frequent replacement, circuit breakers provide long-term cost savings due to their reusable nature.

    At Sonic Electronix, we take pride in offering top-quality circuit breakers to meet the unique needs of our customers. Our vast selection includes circuit breakers of different amperage ratings and sizes to cater to diverse vehicle requirements. Our knowledgeable staff is always ready to assist you in finding the ideal circuit breakers for your specific application. If you have any questions or need guidance, do not hesitate to call us at 1-502-200-8010, and our friendly team will be delighted to help.

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