--- product_id: 172147786 title: "Keenso 140 Amp Dual Battery Isolator, VSR Voltage Sensitive Relay, Automatic Charging Relay for RV, Boat, Camping, Marine, Auto, Truck" brand: "keenso" price: "S$53" currency: SGD in_stock: true reviews_count: 7 category: "Keenso" url: https://www.desertcart.sg/products/172147786-keenso-140-amp-dual-battery-isolator-vsr-voltage-sensitive-relay store_origin: SG region: Singapore --- # 140A high current capacity Automatic dual battery charging Flexible panel or surface mount Keenso 140 Amp Dual Battery Isolator, VSR Voltage Sensitive Relay, Automatic Charging Relay for RV, Boat, Camping, Marine, Auto, Truck **Brand:** keenso **Price:** S$53 **Availability:** βœ… In Stock ## Summary > πŸ”Œ Stay charged, stay ready β€” power your adventures with Keenso’s 140A dual battery isolator! ## Quick Answers - **What is this?** Keenso 140 Amp Dual Battery Isolator, VSR Voltage Sensitive Relay, Automatic Charging Relay for RV, Boat, Camping, Marine, Auto, Truck by keenso - **How much does it cost?** S$53 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/172147786-keenso-140-amp-dual-battery-isolator-vsr-voltage-sensitive-relay) ## Best For - keenso enthusiasts ## Why This Product - Trusted keenso brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Backed by Confidence:** Comes with a solid product guarantee and responsive customer care within 24 hours. - β€’ **Power Up Without Pause:** Ensures your secondary battery charges only when the starter battery is full, so you never get stranded. - β€’ **Heavy-Duty 140 Amp Capacity:** Handles high current loads effortlessly, perfect for RVs, boats, trucks, and camping setups. - β€’ **Built to Last, Built to Perform:** Premium nylon shell resists aging and abrasion, guaranteeing durability on every adventure. - β€’ **Seamless Installation Flexibility:** Choose panel or surface mount options to fit your vehicle’s design without voltage drops. ## Overview The Keenso 140 Amp Dual Battery Isolator is a robust voltage sensitive relay designed for automatic charging of dual-battery systems in vehicles like RVs, boats, and trucks. It supports up to 140 amps, offers flexible mounting options, and features a durable nylon shell for long-lasting use. This isolator ensures your secondary battery charges only when the starter battery is sufficiently charged, preventing power loss and extending battery life. IP65 rated and backed by a money-back guarantee, it’s engineered for reliable, maintenance-free operation on the go. ## Description Buy Keenso 140 Amp Dual Battery Isolator, VSR Voltage Sensitive Relay, Automatic Charging Relay for RV, Boat, Camping, Marine, Auto, Truck: Battery Switches - desertcart.com βœ“ FREE DELIVERY possible on eligible purchases Review: Works great - Does what it says, it cuts the power from my second battery and I do like the fact that it can be used manually. It turns off around 12.8 so it works for me. Review: Not as Advertised - This power isolator shows to have extra wires that you can tie off of for ignition protection and status lights, the two I ordered only has one black ground lead and no other wires. The instructions in the box show the other wires but the ones I received did not. Also, when active, the isolators do not actually isolate the two batteries. It combines the two batteries even when the vehicle is off and there is no charge from engine. If one battery is dead, then the isolator does not even see it and will not charge the dead battery. defeating the purpose. Just need to either get two correct models that I paid for and that was advertised on both desertcart and the box they came in or need to get money back. ## Features - β˜†Great For Dual-Battery Vehicle: A 140 amp voltage sensitive relay (VSR) is the to ensure you can always get your dual-battery vehicle started. Once your main starter battery is sufficiently charged, it will begin charging the second battery - β˜† 140 Amp Dual Battery Isolator: The dual battery isolator is all you need to battery systems. Dimensions fits Heavy Duty Modular Box Series (BF43x) and Battery Switch, matching mainstream products in market - β˜† Easy Installation: or panel mount options provides flexibility when installing. No voltage drops comparing to battery isolator diodes (0.6V). Combine / Open Voltage: DC 13.3V / 12.8V - β˜† Premium Quality: Made of premium nylon shell material, this vsr voltage sensitive relay is sturdy, not easy to aging and abrasion resistant, to ensure maximum strength and durability for long lasting usage - β˜† What You Will Get: We stand behind all of our them with a product guarantee and promise to give you the best in customer care! If you have any issue about the item, please us by e-mail, we will try our best within 24 hours to reply ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07R9T7L5J | | Best Sellers Rank | #2,142,984 in Automotive ( See Top 100 in Automotive ) #1,360 in Automotive Replacement Battery Switches | | Brand | Keenso | | Brand Name | Keenso | | Coil Voltage | 12 volts | | Connector Type | Screw | | Contact Current Rating | 140 A | | Contact Type | Normally Open | | Current Rating | 140 A | | Customer Reviews | 4.1 out of 5 stars 32 Reviews | | Manufacturer | Keenso | | Minimum Switching Voltage | 12.8 volts_of_direct_current | | Mounting Type | Panel Mount, Surface Mount | | Operation Mode | Automatic | | Part Number | Keen sopcxwe1mgif | | Specification Met | Ip65, Warranty, Money Back Guarantee | | UPC | 753874094834 | | Wattage | 330 Milliwatts | ## Product Details - **Brand:** Keenso - **Connector Type:** Screw - **Contact Type:** Normally Open - **Current Rating:** 140 Amps - **Mounting Type:** Panel Mount, Surface Mount ## Images ![Keenso 140 Amp Dual Battery Isolator, VSR Voltage Sensitive Relay, Automatic Charging Relay for RV, Boat, Camping, Marine, Auto, Truck - Image 1](https://m.media-amazon.com/images/I/5154xXIR9HL.jpg) ![Keenso 140 Amp Dual Battery Isolator, VSR Voltage Sensitive Relay, Automatic Charging Relay for RV, Boat, Camping, Marine, Auto, Truck - Image 2](https://m.media-amazon.com/images/I/51pwglum16L.jpg) ![Keenso 140 Amp Dual Battery Isolator, VSR Voltage Sensitive Relay, Automatic Charging Relay for RV, Boat, Camping, Marine, Auto, Truck - Image 3](https://m.media-amazon.com/images/I/618ClCiKOFL.jpg) ![Keenso 140 Amp Dual Battery Isolator, VSR Voltage Sensitive Relay, Automatic Charging Relay for RV, Boat, Camping, Marine, Auto, Truck - Image 4](https://m.media-amazon.com/images/I/51PqaWgNUQL.jpg) ![Keenso 140 Amp Dual Battery Isolator, VSR Voltage Sensitive Relay, Automatic Charging Relay for RV, Boat, Camping, Marine, Auto, Truck - Image 5](https://m.media-amazon.com/images/I/51UKpVTSzOL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works great *by B***5 on March 22, 2020* Does what it says, it cuts the power from my second battery and I do like the fact that it can be used manually. It turns off around 12.8 so it works for me. ### ⭐⭐ Not as Advertised *by K***K on August 16, 2025* This power isolator shows to have extra wires that you can tie off of for ignition protection and status lights, the two I ordered only has one black ground lead and no other wires. The instructions in the box show the other wires but the ones I received did not. Also, when active, the isolators do not actually isolate the two batteries. It combines the two batteries even when the vehicle is off and there is no charge from engine. If one battery is dead, then the isolator does not even see it and will not charge the dead battery. defeating the purpose. Just need to either get two correct models that I paid for and that was advertised on both amazon and the box they came in or need to get money back. ### ⭐⭐⭐⭐⭐ Works as started *by M***D on August 21, 2019* Very happy with the function of this VSR. Installed it in my 18’ fishing boat to charge the trolling motor battery from the main. Was on a week long trip and never had to remove the battery to try to charge it off the generator. I also installed an isolator switch to allow me to completely isolate from the main. Planning on buying another one to split my β€œmain” battery into to a starter and house battery in the future. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/172147786-keenso-140-amp-dual-battery-isolator-vsr-voltage-sensitive-relay](https://www.desertcart.sg/products/172147786-keenso-140-amp-dual-battery-isolator-vsr-voltage-sensitive-relay) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-08-30*