500 Amp Relay Isolator (BIR500)

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

Learn more about the bir500
Was $89.99 Details
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Product Highlights

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


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Authorized dealer

Isolate with Confidence

The NXV BIR500 Isolator is the perfect solution when adding a secondary battery to your audio system. It allows the second battery to be fully dedicated to the sound system and does not create a voltage drop like common isolators tend to do. The isolator will draw less than 1 amp when your vehicle is powered on. All of this will ensure that your battery will be isolated with confidence!

Lengthen the Life your Batteries

When two vehicle batteries are wired in parallel they have a tendency to charge and drain one another. Installing a relay that disconnects the batteries when the engine is off prevents excessive wear and lengthens the life of the batteries. Whenever you turn your engine back on, the batteries will be connected without any voltage drop to the second battery.

Product Details:

  • Mobile Audio Relay and Battery Isolator
  • Great for isolating a second batter making it dedicated to the stereo system
  • Does not create a voltage drop to the second battery like conventional isolators
  • 500 Amps at 12V Continuous Power Handling
  • 700 Amps Surge Power Handling
  • Switching Power: 10 - 16 VDC
  • Draws Less Than 1 Amp When On
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Battery Isolator Relay Wiring Diagram:

Specifications & Details

Battery Isolator Features
Compatible Amperage
500 amps
Surge Amperage
700 amps
Isolator Type
Relay (Solenoid)
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Item Details



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Product and How-to Videos

Customer Ratings & Reviews

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Customer Reviews

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Excellent product

Works as advertised. Easy to install. No problems so far.

By Imran on May 8, 2014


found this helpful.

Unbeatable deal

Great product at a great price. Shipping is reasonable and fast.

By sonrich64 on March 17, 2014


found this helpful.

does what its supposed to

Very nice quality piece. Gets the job done. Very simple to install. Don't overtighten the lock Nuts though.

By Z on May 8, 2014


found this helpful.

worth the money

Im totally satisfied with my purchase. This is a good and durable product. Like always, sonic electronix processed and shipped my order fast.

By thomas on May 5, 2014


found this helpful.

very good

you wont find a cheaper battery isolator that handles 500 amp

great product thanks sonic

By Abdulrahman on February 2, 2014


found this helpful.

Very happy.

Product works just as advertised and suits my purposes perfectly. My second battery drives a heavy duty wench, fog lights, and stereo system and the NVX BIR500 has been keeping it well charged. It was easy and quick to install. The only thing I wish it came with would be rubber caps for the posts. I accidentally tapped them more than once, causing sparks (that's why the 3 under 'look/design'), Before I wrapped them in electrical tape. Other than that I've very happy with it.

By Jon on July 13, 2014


found this helpful.

Great equipment for the price

Had my profesional installler put in in line between my batteries (which are in parallel), works like it should with no probloms. Can't beat the price for a 500 amp isolator!

By Cool Tuff on October 27, 2014


found this helpful.

Nvx bir500

This prod is to keep your batteries sepret from one to the other is the best way to keep your batteries all way charge and sepret at same time verry good prod

By Flaco sound on September 17, 2013


found this helpful.

Perfect for use with After Market Sound System Battery Power

Met my expectations.Perfect use for allowing the Second Battery to work with my Aftermarket Sound System without draining my Primary Battery.

By Bob on March 1, 2015


found this helpful.

good buy

Exactly as described. Easy to install. Havent gotten the whole system up and running yet so we dont know if it works yet or does its job.

By Cody on June 19, 2015 Checkmark Icon Verified purchase


found this helpful.

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