--- product_id: 266815448 title: "12V 140 Amp Dual Battery Smart Isolator & ATV UTV Wiring Kit by - Voltage Sensitive Relay - VSR" brand: "keyline chargers" price: "B/.462" currency: PAB in_stock: true category: "Key Line Chargers" url: https://www.desertcart.com.pa/products/266815448-12v-140-amp-dual-battery-smart-isolator-and-atv-utv store_origin: PA region: Panama --- # 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:** B/.462 **Availability:** ✅ In Stock ## Summary > 🔋 Power up smart, stay charged longer, and never get left behind! ## 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?** B/.462 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/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:** Fits seamlessly under your hood or tight spaces, perfect for ATV, UTV, and off-road setups. - • **Maximize Battery Efficiency:** Forget power-draining diode relays—enjoy full 140 Amp output with zero sacrifice on performance. - • **Smart Voltage Sensitive Relay:** Automatically engages at 13.3V and disengages at 12.8V for optimal dual battery charging without power loss. - • **Complete DIY Wiring Kit Included:** All heavy gauge cables, connectors, mounting hardware, and easy instructions for hassle-free installation. - • **Rugged IP65 Certified Durability:** Built to withstand dust, rain, and extreme weather—ready for your toughest adventures. ## Overview The KeyLine 12V 140 Amp Dual Battery Smart Isolator with Voltage Sensitive Relay is a compact, rugged, and highly efficient device designed to optimize dual battery charging systems. Featuring IP65 certification for weather resistance and a smart relay that activates precisely between 12.8V and 13.3V, it ensures your primary battery stays fully charged without power loss. The included comprehensive wiring kit and easy installation make it ideal for ATV, UTV, and off-road vehicle enthusiasts seeking reliable, high-performance battery management. ## 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. ## 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 | #36,970 in Sporting Goods ( See Top 100 in Sporting Goods ) #4 in Boat Battery Chargers | | Item model number | Iso-Pro140 | | Manufacturer | KeyLine Chargers | | Product Dimensions | 5 x 5 x 5 cm; 226.8 g | ## 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) ## Available Options This product comes in different **Size** options. ## 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.pa/products/266815448-12v-140-amp-dual-battery-smart-isolator-and-atv-utv](https://www.desertcart.com.pa/products/266815448-12v-140-amp-dual-battery-smart-isolator-and-atv-utv) --- *Product available on Desertcart Panama* *Store origin: PA* *Last updated: 2026-10-24*