--- product_id: 266815448 title: "12V 140 Amp Dual Battery Smart Isolator & ATV UTV Wiring Kit by - Voltage Sensitive Relay - VSR" brand: "keyline chargers" price: "AR$312021" currency: ARS in_stock: true reviews_count: 5 category: "Key Line Chargers" url: https://www.desertcart.com.ar/products/266815448-12v-140-amp-dual-battery-smart-isolator-and-atv-utv store_origin: AR region: Argentina --- # 140 Amp max current Compact 2.6" x 2.6" x 2" size IP65 weather & dust resistant 12V 140 Amp Dual Battery Smart Isolator & ATV UTV Wiring Kit by - Voltage Sensitive Relay - VSR **Brand:** keyline chargers **Price:** AR$312021 **Availability:** ✅ In Stock ## Summary > ⚡ Power up smarter, not harder — never get stranded again! ## Quick Answers - **What is this?** 12V 140 Amp Dual Battery Smart Isolator & ATV UTV Wiring Kit by - Voltage Sensitive Relay - VSR by keyline chargers - **How much does it cost?** AR$312021 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/266815448-12v-140-amp-dual-battery-smart-isolator-and-atv-utv) ## 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 - • **Ultra-Compact Design:** Small footprint fits seamlessly under your hood, optimizing space without compromising performance. - • **Complete DIY Wiring Kit:** Includes heavy gauge cables, connectors, mounting hardware, and clear instructions for hassle-free installation. - • **Maximize Battery Efficiency:** Forget power-draining diode relays—this smart isolator delivers full 140 Amp output for peak dual battery performance. - • **Smart Voltage Sensitive Relay:** Automatically engages at 13.3V and disengages at 12.8V to keep your batteries perfectly balanced without power loss. - • **Rugged IP65 Certified Durability:** Built to withstand dust, rain, and extreme off-road conditions—reliable power wherever you go. ## Overview The 12V 140 Amp Dual Battery Smart Isolator by KeyLine features a cutting-edge Voltage Sensitive Relay that automatically manages dual battery charging with zero power loss. Its ultra-compact 2.6" x 2.6" x 2" design fits easily under the hood, while IP65 certification ensures durability in harsh environments. The kit includes all necessary heavy gauge wiring and hardware for straightforward DIY installation, making it the ultimate solution for reliable dual battery management in ATVs, UTVs, and other vehicles. ## Description International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. Review: Need for new vehicles Review: Very easy to install ## Features - Forget the traditional diode relays and so-called "solid state" devices that can rob you of almost 2 amps of output power! The Keyline Dual Battery Isolator is the only SMART unit designed with cutting edge programming to deliver optimum performance - with ZERO sacrifice. This compact battery isolator was built ultra-small (2.6" x 2.6" x 2") to fit almost anywhere! A perfect fit under the hood to get close to your dual batteries. - VOLTAGE SENSITIVE RELAY: The KeyLine Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts 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! - RUGGED DURABILITY: Unlike other chargers on the market today, the KeyLine Automatic 140 Amp Dual Battery Isolator is IP65 Certified. This International Protection rating means that your KeyLine isolator is safe for use even for your off-road needs in dusty, wet and unexpected extreme weather environments. - WHAT YOU GET: 140 Amp Smart Battery Isolator; 7AWG x 12 Red Cable with two connectors; 3AWG x 12 Black Cable with two connectors; 7AWG x 24 Red Cable (cut to length, with single connector); (1) 5/16 Lug Cable End, (1) 3/8 Lug Cable End; 1-1 ½ Red Shrink Tube. 3-wire install and comes with mounting plate, hardware, heavy gauge ground and power wires (see images for exact contents of kit). Easy-to-follow directions for the novice DIYer. Power wire in, power wire out. What could - International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00WTAFR52 | | Best Sellers Rank | #23,151 in Automotive ( See Top 100 in Automotive ) #4 in Automotive Replacement Battery Relocation Kits #2,358 in Automotive Replacement Electrical System Relays | | Date First Available | April 28, 2015 | | Is Discontinued By Manufacturer | No | | Item Weight | 8 ounces | | Item model number | Iso-Pro140 | | Manufacturer | KeyLine Chargers | | Product Dimensions | 1.97 x 1.97 x 1.97 inches | ## Images ![12V 140 Amp Dual Battery Smart Isolator & ATV UTV Wiring Kit by - Voltage Sensitive Relay - VSR - Image 1](https://m.media-amazon.com/images/I/61MYMB46z7L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Need for new vehicles *by A***Y on 12 October 2022* ### ⭐⭐⭐⭐⭐ Very easy to install *by T***G on 6 April 2025* ### ⭐⭐⭐⭐⭐ Great isolator. Works great in 2016 Polaris Ranger 900-5 Crew. *by B***N on 19 June 2017* ## Frequently Bought Together - Dual Battery Isolator Kit 12v 140 Amp - ATV/UTV Wiring Kit - Voltage Sensitive Relay - VSR - Boat Dual Battery Smart Isolator 12v Kit, Automatic Battery Disconnect Switch 12V by KeyLine Chargers - T Tocas 100A Amp Circuit Breaker for Boat Trolling Motor Marine ATV Vehicles Stereo Audio Battery Solar System with Manual Reset Switcher 100 amp Waterproof DC 12V-48V (100A) - SHURIKEN SK-BT35 12-Volt High Performance AGM Power Cell Battery for Systems Up to 800-Watts --- ## 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.com.ar/products/266815448-12v-140-amp-dual-battery-smart-isolator-and-atv-utv](https://www.desertcart.com.ar/products/266815448-12v-140-amp-dual-battery-smart-isolator-and-atv-utv) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-05-22*