---
product_id: 18154224
title: "Dual Battery Isolator Kit 12V - 140 Amp Voltage Sensitive Relay (VSR) for Dual Battery Setup"
brand: "keyline chargers"
price: "R$1953"
currency: BRL
in_stock: true
url: https://www.desertcart.com.br/products/18154224-dual-battery-isolator-kit-12v-140-amp-voltage-sensitive-relay
store_origin: BR
region: Brazil
---

# 140 Amp high-capacity relay Automatic voltage-sensitive switching IP65-rated rugged durability Dual Battery Isolator Kit 12V - 140 Amp Voltage Sensitive Relay (VSR) for Dual Battery Setup

**Brand:** keyline chargers
**Price:** R$1953
**Availability:** ✅ In Stock

## Summary

> 🔌 Stay Powered, Stay Ahead – Never Let Your Batteries Hold You Back!

## Quick Answers

- **What is this?** Dual Battery Isolator Kit 12V - 140 Amp Voltage Sensitive Relay (VSR) for Dual Battery Setup by keyline chargers
- **How much does it cost?** R$1953 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/18154224-dual-battery-isolator-kit-12v-140-amp-voltage-sensitive-relay)

## Best For

- keyline chargers enthusiasts

## Why This Product

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

## Key Features

- • **DIY-Ready Kit:** Complete wiring kit with cables, terminals, and clear instructions for hassle-free installation.
- • **Built for the Wild:** IP65-rated for water, dust, and vibration resistance—ready for off-road, marine, and daily drives.
- • **Confidence Guaranteed:** Backed by a 12-month warranty and 30-day money-back promise for risk-free power management.
- • **Smart Voltage Control:** Automatically engages at 13.3V and disconnects at 12.8V to protect your starter battery.
- • **Power Without Compromise:** 140 Amp solid-state relay delivers seamless dual battery charging with zero power loss.

## Overview

The KeyLine Chargers Dual Battery Isolator Kit features a 140 Amp voltage sensitive relay that automatically manages power distribution between two 12V batteries. Compact and rugged with an IP65 rating, it ensures reliable charging without power loss in harsh environments. Designed for easy DIY installation, this kit includes all necessary cables and terminals, backed by a 12-month warranty and 30-day money-back guarantee.

## Description

Dual Battery Isolator Kit 12V - 140 Amp Voltage Sensitive Relay (VSR) for Dual Battery Setup

## Features

- Advanced Dual Battery Isolator 12V Kit – Designed for superior performance, this dual battery kit ensures efficient power distribution between two batteries without voltage drops. Unlike traditional battery isolator diodes, this automatic disconnect switch eliminates power loss while maintaining a seamless connection between your primary and auxiliary power sources. Compact at 2.6” x 2.6” x 2”, it’s perfect for under-hood installations or as part of a battery relocation kit.
- Smart Voltage Sensitive Relay (VSR) for Optimal Charging – Featuring a 12V dual battery wiring kit, this system automatically activates at 13.3V and disengages at 12.8V, ensuring your starting battery remains fully charged. Whether you're installing a marine dual battery kit for your boat, a dual battery kit for truck applications, or need a battery isolator 12V kit for off-grid power, this setup prevents battery drain and guarantees reliable performance.
- Built for Extreme Conditions & Rugged Durability – Engineered for off-road adventures, marine use, and daily driving, this dual battery isolator kit is IP65-rated for water, dust, and vibration resistance. Its solid-state design ensures durability, making it an excellent choice for automotive, RV, UTV, and marine battery isolator needs. Whether battling tough trails or navigating open waters, count on this dual battery wiring kit to provide uninterrupted power.
- Complete Dual Battery Wiring Kit for Easy DIY Installation – No complicated setup required! This battery isolator kit includes (1) 140 Amp voltage sensitive relay, (1) 20-ft red power cable, (1) 2-ft black ground cable, (2) positive marine-type brass battery terminals, (1) negative brass terminal, tinned copper lugs, heat shrink tubing, cable ties, and step-by-step instructions. Perfect for DIYers of all skill levels—just connect the power wire in, power wire out, and you’re ready to go!
- Trusted Performance with Warranty & Money-Back Guarantee – Every dual battery kit by KeyLine Chargers is backed by a 12-month industry-leading warranty. If you’re not 100% satisfied with your purchase, take advantage of our 30-day money-back guarantee—no questions asked! Drive with confidence knowing you have a premium battery isolator 12V kit keeping your power system running at full capacity.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | KeyLine Chargers |
| Brand | KeyLine Chargers |
| Model | Iso-Pro140DBK |
| Item Weight | 8 ounces |
| Product Dimensions | 2 x 2.6 x 2.6 inches |
| Item model number | Iso-Pro140DBK |
| Is Discontinued By Manufacturer | No |
| Exterior | PVC Matte Black |
| Manufacturer Part Number | Iso-Pro140DBK |
| Safety Rating | Other |
| Voltage | 12 Volts |

## Images

![Dual Battery Isolator Kit 12V - 140 Amp Voltage Sensitive Relay (VSR) for Dual Battery Setup - Image 1](https://m.media-amazon.com/images/I/71WIiA3z+rL.jpg)

## Available Options

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

## Frequently Bought Together

- Dual Battery Isolator Kit, 140 Amp 12v Voltage Sensitive Relay (VSR), Automatic Disconnect Switch | Cars, RV, UTV, ATV, Marine Switches for Bateries by KeyLine Chargers
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- 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

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**Shop now:** [https://www.desertcart.com.br/products/18154224-dual-battery-isolator-kit-12v-140-amp-voltage-sensitive-relay](https://www.desertcart.com.br/products/18154224-dual-battery-isolator-kit-12v-140-amp-voltage-sensitive-relay)

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-20*