--- product_id: 558479334 title: "Heart Horse 3m Split Charge Relay Kit,12V 140Amp Smart Dual Battery Isolator Kit Manual/Auto Modes VSR-Voltage Sensitive Relay Kit with LED Screen, Voltage Display for Truck,SUV,RV,ATV,UTV,Boat" brand: "heart horse" price: "R2228" currency: ZAR in_stock: true reviews_count: 13 category: "Heart Horse" url: https://www.desertcart.co.za/products/558479334-heart-horse-3m-split-charge-relay-kit-12v-140amp-smart store_origin: ZA region: South Africa --- # 140A high current rating Smart voltage sensitive relay (13.3V cut-in, 12.8V cut-out) Complete 3m cable kit with accessories Heart Horse 3m Split Charge Relay Kit,12V 140Amp Smart Dual Battery Isolator Kit Manual/Auto Modes VSR-Voltage Sensitive Relay Kit with LED Screen, Voltage Display for Truck,SUV,RV,ATV,UTV,Boat **Brand:** heart horse **Price:** R2228 **Availability:** ✅ In Stock ## Summary > 🔌 Dual power, zero downtime — keep your gear charged and ready to roll! ## Quick Answers - **What is this?** Heart Horse 3m Split Charge Relay Kit,12V 140Amp Smart Dual Battery Isolator Kit Manual/Auto Modes VSR-Voltage Sensitive Relay Kit with LED Screen, Voltage Display for Truck,SUV,RV,ATV,UTV,Boat by heart horse - **How much does it cost?** R2228 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/558479334-heart-horse-3m-split-charge-relay-kit-12v-140amp-smart) ## 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-rated, vibration-proof design built to thrive in the harshest environments. - • **Smart Voltage Control:** Auto/manual modes intelligently manage battery connection at 13.3V/12.8V to protect your power sources. - • **Power Up Without Limits:** Seamlessly charges dual batteries with 140A capacity for unstoppable adventures. - • **DIY Friendly Installation:** Comes with all cables, terminals, and instructions for a quick, confident setup. - • **Universal Vehicle Compatibility:** Perfect for trucks, SUVs, RVs, boats, ATVs, and more — one kit fits all your rides. ## Overview The Heart Horse 3m Split Charge Relay Kit is a 12V 140A smart dual battery isolator designed to automatically manage and protect two battery systems. Featuring voltage sensitive relay technology with precise cut-in (13.3V) and cut-out (12.8V) thresholds, it ensures your starter and auxiliary batteries charge efficiently without draining each other. Compatible with a wide range of vehicles including trucks, SUVs, RVs, boats, and ATVs, this IP68-rated, vibration-resistant kit includes all necessary cables and accessories for easy installation. Its LED voltage display and manual/auto modes provide real-time battery monitoring and control, making it an essential upgrade for professionals who demand reliable power on the go. ## Description Product Description This 3m Split Charge Relay Kit, 12V 140 Amp Dual Battery Isolator Kit will come with all necessary accessoires for convenient use. Heart Horse Split Charge Relay Kit ,Smart Dual Battery Isolator Kit 12V 140A Auto/Manual Mode Voltage Sensitive Relay VSR with Digital Voltmeter for Camper Car RV Yacht Steamer Features This 12V 140A VSR Voltage Sensitive Split Charge Relay Kit With Cable seamlessly separates your primary battery from your auxiliary battery, ensuring your engine always has a reliable source of power. 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). The design of the digital voltage display not only facilitates real-time grasp of battery power, but also allows precise control of battery voltage. Voltage Sensitive Relay VSR Smart Dual Battery Isolator Kit CUT-IN VOLTAGE: 13.3V DCCUT-OUT VOLTAGE:12.8V DC Voltage Sensitive Relay (VSR) allows charging of two batteries simultaneously. When the engine starts and the starting battery reaches 13.3 volts, the VSR engages, allowing both battery packs to charge simultaneously (Starting Battery Pack and Household Battery Pack). When the voltage drops below 12.8 volts, the VSR disconnects and separating the battery. This reduces the possibility of battery depletion, effectively protects sensitive electronic devices powered by indoor batteries, and extends their service life. Package Included: Total Red Cable length 3mtrs 1 x Dual Battery Isolator; 1 x 7AWG Red Cable 2m;1 x 7AWG Red Cable 0.5m;2 x 7AWG Red Cable 0.25m;1 x 7AWG black Cable 1m; 10 x Black Nylon Cable Ties; 10 x Adhesive Cable Tie Fixing Bases; 2 x Fuse Holders；4 x Fuses 60A; 15 x Fixing Screws; 6 x Red Heat Shrink Covers；1 x Black Heat Shrink Covers; 1 x Positive Marine Battery Terminals (red)；1 x Negative Marine Battery Terminals (black); 2 x SC16-8 Copper Crimp Lugs；4 x Insulated Blue Ring Terminal；4 x Installation Screw; 1x Easy to Understand Fitting Instructions; Voltmeter Display If two batteries are connected, then the voltage displayed on the voltmeter is the battery that has a higher voltage. Connect the battery that you want to test. When the voltmeter is not working, press the button once, the voltmeter will display the value for 2 seconds. Manual and Auto Modes Long press the "Power" button for 3 seconds - the blue (LED) indicator will be ON, the manual mode is on. Long press the "Power" button for 3 seconds - the blue (LED) indicator will be OFF, the auto mode is on. In auto mode, 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. Silicon Sealed Internal Layer enhanced with a silicon-sealed internal layer,designed to excel in the most demanding conditions.it is built to withatand extreme vibrations and perform flawlessly in intense weather environments. 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 - ✔【VOLTAGE SENSITIVE RELAY】 Automatic /Manual 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR) cuts in at 13.3V and cuts out at 12.8V to ensure your primary battery is always charged and ready to start your vehicle. It's like having two separate power sources for each battery while only having one alternator! - ✔【UNIVERSAL COMPATIBILITY】Like Having Two Separate Power Sources,The Dual Battery Isolator Kit Enables Your Accessories to Run From a Separate Battery While the engine is not running on your vehicle While keeping your Main Battery Charged,power up any ground or marine vehicle including ATVs, boats, cars, mini-vans, trucks, RVs, and yachts; Perfect versatile solution for all automotive power needs. - ✔【EASY TO INSTALL】The VSR split charge relay kit comes with full installation accessories and cables (battery cables, battery terminals, copper lugs, heat shrinks, cable ties) that make it easy for users to install it independently to vehicles, boats, recreational vehicles, and other equipment. - ✔【SAFE&EFFICIENT 】The dual battery isolator efficiently manages and protects power, preventing over-discharge of the main battery and ensuring full charging of the second battery. With high-quality materials and an IP68 waterproof, dustproof, and vibration-proof construction, our battery isolator delivers reliable performance even in harsh environments. - ✔【BUY WITH CONFIDENCE】This 12V dual battery isolator kit comes with a 30-day money-back guarantee, providing reliable and efficient performance for your vehicle or boat, and allowing you to purchase with confidence. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CF8F7B6N | | Best Sellers Rank | 3,593 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 Alloy | | Contact Type | Voltage Sensitive | | Contact material | Copper Alloy | | Contact type | Voltage Sensitive | | Country Of Origin | China | | Current Rating | 140 Amps | | Current rating | 140 Amps | | Customer Reviews | 4.4 out of 5 stars 498 Reviews | | Manufacturer | YYGS_AMZgb | | Manufacturer Part Number | sku6197-yy | | Minimum Switching Voltage | 13.3 Volts | | Model Number | sku6197-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 Alloy - **Contact type:** Voltage Sensitive - **Current rating:** 140 Amps - **Mounting type:** Screw Mount ## Images ![Heart Horse 3m Split Charge Relay Kit,12V 140Amp Smart Dual Battery Isolator Kit Manual/Auto Modes VSR-Voltage Sensitive Relay Kit with LED Screen, Voltage Display for Truck,SUV,RV,ATV,UTV,Boat - Image 1](https://m.media-amazon.com/images/I/71mvxIC0bTL.jpg) ![Heart Horse 3m Split Charge Relay Kit,12V 140Amp Smart Dual Battery Isolator Kit Manual/Auto Modes VSR-Voltage Sensitive Relay Kit with LED Screen, Voltage Display for Truck,SUV,RV,ATV,UTV,Boat - Image 2](https://m.media-amazon.com/images/I/61t6+fsJoFL.jpg) ![Heart Horse 3m Split Charge Relay Kit,12V 140Amp Smart Dual Battery Isolator Kit Manual/Auto Modes VSR-Voltage Sensitive Relay Kit with LED Screen, Voltage Display for Truck,SUV,RV,ATV,UTV,Boat - Image 3](https://m.media-amazon.com/images/I/71UNT1upViL.jpg) ![Heart Horse 3m Split Charge Relay Kit,12V 140Amp Smart Dual Battery Isolator Kit Manual/Auto Modes VSR-Voltage Sensitive Relay Kit with LED Screen, Voltage Display for Truck,SUV,RV,ATV,UTV,Boat - Image 4](https://m.media-amazon.com/images/I/61WVokhZbQL.jpg) ![Heart Horse 3m Split Charge Relay Kit,12V 140Amp Smart Dual Battery Isolator Kit Manual/Auto Modes VSR-Voltage Sensitive Relay Kit with LED Screen, Voltage Display for Truck,SUV,RV,ATV,UTV,Boat - Image 5](https://m.media-amazon.com/images/I/71d36GolQbL.jpg) ## Available Options This product comes in different **Size** options. ## 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. ## Frequently Bought Together - Heart Horse 3m Split Charge Relay Kit,12V 140Amp Smart Dual Battery Isolator Kit Manual/Auto Modes VSR-Voltage Sensitive Relay Kit with LED Screen, Voltage Display for Truck,SUV,RV,ATV,UTV,Boat - ARONOVA Passenger Side Battery Tray Replacement With Base Clamp Kit Compatible with select Cadillac Escalade/Chevrolet Avalanche,Silverado,Suburban,Tahoe/GMC Sierra,Yukon models - ARONOVA Base Clamp Battery Hold Down with 304 stainless steel bolt Kit Compatible with Select GMC/Buick/Cadillac/Chevy/Hummer/Saturn/Pontiac/Oldsmobile Models,14005061 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/558479334-heart-horse-3m-split-charge-relay-kit-12v-140amp-smart](https://www.desertcart.co.za/products/558479334-heart-horse-3m-split-charge-relay-kit-12v-140amp-smart) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-06-22*