---
product_id: 293376318
title: "BIR500 500 AMP Battery Relay Isolator and Relay for Cars, RVs, ATVs, UTVs, and Boats."
brand: "nvx"
price: "179629CFA"
currency: XOF
in_stock: true
reviews_count: 5
category: "Nvx"
url: https://www.desertcart.sn/products/293376318-bir500-500-amp-battery-relay-isolator-and-relay-for-cars
store_origin: SN
region: Senegal
---

# 500A continuous power <1A power draw when active 700A surge capacity BIR500 500 AMP Battery Relay Isolator and Relay for Cars, RVs, ATVs, UTVs, and Boats.

**Brand:** nvx
**Price:** 179629CFA
**Availability:** ✅ In Stock

## Summary

> 🔌 Isolate, Amplify, and Power Up Your Ride with Confidence!

## Quick Answers

- **What is this?** BIR500 500 AMP Battery Relay Isolator and Relay for Cars, RVs, ATVs, UTVs, and Boats. by nvx
- **How much does it cost?** 179629CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/293376318-bir500-500-amp-battery-relay-isolator-and-relay-for-cars)

## Best For

- nvx enthusiasts

## Why This Product

- Trusted nvx brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Extend Battery Lifespan:** Prevents batteries from draining each other by isolating them when the engine is off.
- • **Smart Energy Management:** Draws less than 1 amp when on, maximizing battery efficiency and minimizing waste.
- • **Built for All Conditions:** Durable design works flawlessly in extreme temperatures and harsh environments.
- • **Zero Voltage Drop Guarantee:** Ensures your secondary battery powers your audio system without any voltage loss.
- • **Power Through Your Adventures:** Handles a robust 500 amps continuous and surges up to 700 amps for peak performance.

## Overview

The NVX BIR500 is a high-performance 500 AMP battery relay isolator designed for cars, RVs, ATVs, UTVs, and boats. It supports continuous 500A and surge 700A power handling at 12V, draws less than 1 amp when active, and eliminates voltage drop to your secondary battery. This relay isolator extends battery life by preventing cross-drainage and ensures reliable power delivery to your mobile audio or auxiliary systems, even in extreme weather conditions.

## Description

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.

Review: Using in a two battery setup in my truck. With a flip of a switch I can charge the second battery while engine is running or cut it off to play the audio system without running down the primary battery.
Review: I have had this isolator for about a month now and so far it works great. I am using it to connect and disconnect a supplemental charger for a solar powered antenna station. The battery bank is typically powered by the solar panel, but in the winter, sometimes there isn't enough daylight so the batteries need a supplemental charge from my generator, which has a 12v charging output. I just let the generator run, charging the batteries until it runs out of gas. The problem with doing that, before using the isolator, is that when the generator would run out of gas, it would remain connected to the batteries and drain the batteries. With the isolator, as long as the generator is generating power, the isolator stays powered up, which energizes the relay and connects the charger to the batteries. When the generator dies, the relay opens and the generator is disconnected from the batteries. Works like a charm. This relay is installed outside (although covered) in the elements and in temperatures down to 0 degrees F and it has worked great all winter.

## Features

- 500 Amps at 12V Continuous Power Handling
- 700 Amps Surge Power Handling
- Switching Power: 10 - 16 VDC
- Draws Less Than 1 Amp When On
- Mobile Audio Relay and Battery Isolator

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00KMBKWZ0 |
| Item model number | BIR500 |
| Manufacturer | NVX |
| Product Dimensions | 21.21 x 15.19 x 7.01 cm; 821 g |

## Product Details

- **Connector type:** Wired
- **Contact material:** Silver
- **Contact type:** Normally Open
- **Current rating:** 500 Amps
- **Mounting type:** Panel Mount

## Images

![BIR500 500 AMP Battery Relay Isolator and Relay for Cars, RVs, ATVs, UTVs, and Boats. - Image 1](https://m.media-amazon.com/images/I/71RMZAEY59L.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by T***N on 3 June 2025*

Using in a two battery setup in my truck. With a flip of a switch I can charge the second battery while engine is running or cut it off to play the audio system without running down the primary battery.

### ⭐⭐⭐⭐⭐ Review
*by J***E on 12 February 2016*

I have had this isolator for about a month now and so far it works great. I am using it to connect and disconnect a supplemental charger for a solar powered antenna station. The battery bank is typically powered by the solar panel, but in the winter, sometimes there isn't enough daylight so the batteries need a supplemental charge from my generator, which has a 12v charging output. I just let the generator run, charging the batteries until it runs out of gas. The problem with doing that, before using the isolator, is that when the generator would run out of gas, it would remain connected to the batteries and drain the batteries. With the isolator, as long as the generator is generating power, the isolator stays powered up, which energizes the relay and connects the charger to the batteries. When the generator dies, the relay opens and the generator is disconnected from the batteries. Works like a charm. This relay is installed outside (although covered) in the elements and in temperatures down to 0 degrees F and it has worked great all winter.

### ⭐⭐⭐⭐⭐ Review
*by Y***S on 7 September 2025*

Good but need to pull a positive wire from the ignition .

## Frequently Bought Together

- NVX BIR500 500 AMP Battery Relay Isolator and Relay for Cars, RVs, ATVs, UTVs, and Boats.
- TKDMR 10pcs 1/0 AWG-3/8 Battery Lugs,Heavy Duty Wire Lugs,Ring Terminals,Battery Cable Ends,0 Guage terminals,Battery Terminal Connectors with 10pcs 3:1 Heat Shrink Tubing
- Sanuke 10pcs 1/0 AWG-3/8" Battery Lugs, UL Listed Heavy Duty Wire Lugs Ring Terminal 0 Guage terminals Battery Cable Ends/Terminal Connectors with 3:1 Heat Shrink Tubing

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**Shop now:** [https://www.desertcart.sn/products/293376318-bir500-500-amp-battery-relay-isolator-and-relay-for-cars](https://www.desertcart.sn/products/293376318-bir500-500-amp-battery-relay-isolator-and-relay-for-cars)

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-02-18*