---
product_id: 472224145
title: "Heart Horse Split Charge Relay 12V 140 Amp Smart Dual Battery Isolator Manual/Auto Modes VSR-Voltage Sensitive Relay,with LED Screen Voltage Display, Fit for ATV, UTV, Boat, RV,Camper Vehicle"
brand: "heart horse"
price: "253.44 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Heart Horse"
url: https://www.desertcart.tn/products/472224145-heart-horse-split-charge-relay-12v-140-amp-smart-dual
store_origin: TN
region: Tunisia
---

# IP68 waterproof & vibration-proof LED real-time voltage display 140A high current rating Heart Horse Split Charge Relay 12V 140 Amp Smart Dual Battery Isolator Manual/Auto Modes VSR-Voltage Sensitive Relay,with LED Screen Voltage Display, Fit for ATV, UTV, Boat, RV,Camper Vehicle

**Brand:** heart horse
**Price:** 253.44 DT
**Availability:** ✅ In Stock

## Summary

> 🔌 Power up smarter, not harder — never get stranded again!

## Quick Answers

- **What is this?** Heart Horse Split Charge Relay 12V 140 Amp Smart Dual Battery Isolator Manual/Auto Modes VSR-Voltage Sensitive Relay,with LED Screen Voltage Display, Fit for ATV, UTV, Boat, RV,Camper Vehicle by heart horse
- **How much does it cost?** 253.44 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/472224145-heart-horse-split-charge-relay-12v-140-amp-smart-dual)

## Best For

- heart horse enthusiasts

## Why This Product

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

## Key Features

- • **Rugged & Weatherproof:** IP68 waterproof rating ensures reliable performance in rain, mud, and vibration-heavy environments.
- • **Automatic & Manual Modes:** Switch between smart auto cut-in/out and manual control with a simple button press.
- • **Built-in Battery Protection:** Auto disconnects below 11V or above 17V to safeguard your batteries from damage.
- • **Real-Time Voltage Monitoring:** LED screen displays live voltage for instant battery health insights.
- • **Smart Dual Battery Management:** Seamlessly charges two 12V batteries without draining your starter battery.

## Overview

The Heart Horse Split Charge Relay is a 12V 140 Amp smart dual battery isolator designed for trucks, ATVs, boats, and RVs. Featuring an LED voltage display, IP68 waterproof rating, and both automatic/manual modes, it ensures efficient battery charging and protection by isolating your starter and auxiliary batteries. Its rugged design and built-in voltage-sensitive relay optimize battery life and reliability in all conditions.

## Description

Product Description Split Charge Relay Heart Horse 12V 140Amp Smart Dual Battery Isolator Kit with LED Screen,VSR-Voltage Sensitive Relay for Truck,SUV,RV,ATV,UTV,Boat Package Includes 1 x Digital Display Voltage Sensitive Relay This Is a More Convenient Car Battery Disconnect Switch System That Can Remotely Master Kill Your Car Power System,A Proper Maintenance Will Extend And Protect The Battery And Engine Life. The split charge relays allows the split charging of a second battery without discharging the primary battery or the start battery. Features Has Automatic/Manual Two Mode,The design of the digital voltage display not only facilitates real-time grasp of battery power, but also allows precise control of battery voltage. Function: Cut in voltage is 13.3V and Cut out voltage is 12.8V. Two 12V batteries are connected in parallel through this voltage sense relay. Lettng the car generator charge both batteries (Starter battery and a leisure battery). Design for two battery systems isolate and charge, and it allow to have two separate power sources while charging by one alternator. Widely used for car, vehicle, RV, ATV, UTV and boat, also two battery electrical equipment Voltage Sensitive Relay VSR Smart Dual Battery Isolator Kit Cuts in at 13.3 volts and cuts out at 12.8 volts.Two 12V batteries are connected in parallel through this voltage sense relay. Lettng the car generator charge both batteries (Starter battery and a leisure battery). when the input voltage exceeds 13.3V, the circuit will be connected automatically, the voltmeter and red led indicator will also be ON. When the input voltage drops to 12.8V, the circuit will be disconnected automatically, and the voltmeter and led indicator will also be OFF. Automotive Dual Battery Digital Display Isolator Relay

Review: Can recommend - Works perfect.
Review: Good quality, easy installation - Super easy to install, watched a couple of YouTube videos and done it myself with in the hour.

## Features

- 【LED SCREEN REAL-TIME VOLTAGE DISPLAY】 This dual battery isolator is constructed with a voltmeter which will display the real-time voltage, allowing you to control the battery status at any time. If you connect 2 batteries, then the voltmeter will display the battery that has high voltage. The smart battery isolator is universal fit for truck, UTV/ATV, boat, marine, bus, etc.
- 【EASY INSTALLATION AND WATERPROOF】 No need for alternator or ignition connection. After installation, it can still be used normally even if it is affected by vibration, various bad weather and other factors. At the same time, the isolator supports waterproof function, and the waterproof grade is IP68.
- 【MANUAL MODES】 Press and hold the "Power" button for 3 seconds, the upper blue (LED) indicator light is on, and the manual mode is turned on. In this mode, click the "Power" button to turn on/off the isolator. Click the "power" button, the lower red (LED) indicator light is on, and the isolator is turned on; click the "power" button again, the lower red (LED) indicator light is off, and the isolator closure.
- 【AUTOMATIC MODE】Long press the "Power" button for 3 seconds, the upper blue (LED) indicator light goes out, and the automatic mode is turned on. In automatic mode, the voltage-sensitive relay (VSR) cuts in at 13.3 volts, and the lower red (LED) indicator lights up. The voltage-sensitive relay (VSR) is cut off at 12.8 volts, and the lower red (LED) indicator light turns off
- 【Pressure Protection】： Input voltage lower than 11V or Input voltage more than 17V: Circuit will be automatically disconnected so as to protect the main battery from over discharging. Please buy and use the dual battery isolator with confident because we offer quick and excellent after-sales service.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B9GMP4SZ |
| Best Sellers Rank | 3,076 in Automotive ( See Top 100 in Automotive ) 5 in Car Relays |
| Brand | Heart Horse |
| Coil Voltage | 12 Volts |
| Connector Type | Screw |
| Connector type | Screw |
| Contact Current Rating | 140 Amps |
| Contact Material | Copper |
| Contact Type | Normally Closed |
| Contact material | Copper |
| Contact type | Normally Closed |
| Country Of Origin | China |
| Current Rating | 140 Amps |
| Current rating | 140 Amps |
| Customer Reviews | 4.4 out of 5 stars 496 Reviews |
| Manufacturer | TripleWaterTripleGood |
| Manufacturer Part Number | sku3426-yy |
| Minimum Switching Voltage | 12.8 Volts (DC) |
| Model Number | sku3426-yy |
| Mounting Type | Screw Mount |
| Mounting type | Screw Mount |
| Operation Mode | Automatic |
| Specification Met | ABS |
| Wattage | 1680 watts |

## Product Details

- **Connector type:** Screw
- **Contact material:** Copper
- **Contact type:** Normally Closed
- **Current rating:** 140 Amps
- **Mounting type:** Screw Mount

## Images

![Heart Horse Split Charge Relay 12V 140 Amp Smart Dual Battery Isolator Manual/Auto Modes VSR-Voltage Sensitive Relay,with LED Screen Voltage Display, Fit for ATV, UTV, Boat, RV,Camper Vehicle - Image 1](https://m.media-amazon.com/images/I/61gf8Y00VFL.jpg)
![Heart Horse Split Charge Relay 12V 140 Amp Smart Dual Battery Isolator Manual/Auto Modes VSR-Voltage Sensitive Relay,with LED Screen Voltage Display, Fit for ATV, UTV, Boat, RV,Camper Vehicle - Image 2](https://m.media-amazon.com/images/I/71S9tAy+HwL.jpg)
![Heart Horse Split Charge Relay 12V 140 Amp Smart Dual Battery Isolator Manual/Auto Modes VSR-Voltage Sensitive Relay,with LED Screen Voltage Display, Fit for ATV, UTV, Boat, RV,Camper Vehicle - Image 3](https://m.media-amazon.com/images/I/71uCzXxBMiL.jpg)
![Heart Horse Split Charge Relay 12V 140 Amp Smart Dual Battery Isolator Manual/Auto Modes VSR-Voltage Sensitive Relay,with LED Screen Voltage Display, Fit for ATV, UTV, Boat, RV,Camper Vehicle - Image 4](https://m.media-amazon.com/images/I/71Q9trvNFrL.jpg)
![Heart Horse Split Charge Relay 12V 140 Amp Smart Dual Battery Isolator Manual/Auto Modes VSR-Voltage Sensitive Relay,with LED Screen Voltage Display, Fit for ATV, UTV, Boat, RV,Camper Vehicle - Image 5](https://m.media-amazon.com/images/I/71NrniU6qWL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Can recommend
*by S***R on 9 December 2025*

Works perfect.

### ⭐⭐⭐⭐⭐ Good quality, easy installation
*by F***3 on 13 March 2026*

Super easy to install, watched a couple of YouTube videos and done it myself with in the hour.

### ⭐⭐⭐⭐⭐ Chaaaaaaaaaaarge!!!
*by D***N on 22 February 2026*

Great kit and super easy to install. Charges both batteries up brilliantly. Good price and quality. Happy with purchase and definitely recommend.

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-28*