{"product_id":"battery-isolator-12v-with-16-4ft-7awg-cable-kit-smart-140a-split","title":"Battery Isolator 12V with 16.4ft 7AWG Cable Kit - Smart 140A Split","description":"\u003cp\u003eIn this review the Battery Isolator 12V kit is evaluated for people who need a reliable way to keep an auxiliary battery charged while protecting the main battery from discharge. The single biggest reason to consider it is the \u003cstrong\u003eautomatic voltage sensitive relay\u003c\/strong\u003e, which connects or disconnects the auxiliary battery based on main battery voltage so you do not have to manage isolation manually. The included 16.4ft 7AWG cable kit makes routing easier in larger vehicles, and the IP68 waterproof rating means it was designed for outdoor and marine use.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Voltage Sensing:\u003c\/strong\u003e The relay connects the auxiliary battery when the main battery reaches charging voltage, allowing both batteries to be charged from the alternator simultaneously.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in Protection:\u003c\/strong\u003e The circuit automatically disconnects if input voltage falls below 11V or rises above 17V to prevent over discharge and overvoltage on the main battery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong Cable Kit:\u003c\/strong\u003e The 16.4ft 7AWG battery cable included in the kit provides length for flexible installation in trucks, RVs, and boats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Current Capacity:\u003c\/strong\u003e The 140AMP split charge relay handles typical alternator charging currents for dual-battery setups without frequent thermal issues.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeatherproof Build:\u003c\/strong\u003e The IP68 waterproof rating lets the isolator sit in exposed or damp locations common to marine and offroad installations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe kit is well suited to vehicle owners who run accessories off an auxiliary battery and want automatic charging without manual switching, including RV users, 4x4 enthusiasts, boat owners, and owners of ATVs or UTVs. The long 16.4ft 7AWG cable and compact isolator body make it a good fit where routing and space are constraints.\u003c\/p\u003e\n\u003cp\u003eIt is not appropriate for systems that rely on ternary lithium battery chemistry, as the product is explicitly not compatible with those cells. Buyers needing a battery isolator tailored specifically for advanced lithium battery management or integrated battery management systems should look elsewhere.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAutomatic voltage sensing simplifies dual-battery charging without manual switching.\u003c\/li\u003e\n\u003cli\u003eIP68 waterproof rating increases suitability for marine and offroad use.\u003c\/li\u003e\n\u003cli\u003eLong 16.4ft 7AWG cable makes installation easier in larger vehicles.\u003c\/li\u003e\n\u003cli\u003eBuilt-in low and high voltage thresholds protect the main battery from damage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFunctionality reports are mixed from customers, so some installations may require troubleshooting to achieve expected operation.\u003c\/li\u003e\n\u003cli\u003eNot compatible with ternary lithium battery chemistries, limiting use with newer lithium systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003e12V Smart Voltage Sensitive Relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCurrent Rating\u003c\/td\u003e\n\u003ctd\u003e140AMP split charge relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable Kit\u003c\/td\u003e\n\u003ctd\u003e16.4ft 7AWG battery cable included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage Protection Range\u003c\/td\u003e\n\u003ctd\u003eDisconnect under 11V or over 17V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWaterproof Rating\u003c\/td\u003e\n\u003ctd\u003eIP68\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Vehicles\u003c\/td\u003e\n\u003ctd\u003eRVs, cars, ATVs, UTVs, boats, 12V DC systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Battery Isolator 12V kit is a practical, affordable solution for keeping an auxiliary battery charged while protecting the main battery, especially for recreational vehicles, offroad rigs, and marine use. Its \u003cstrong\u003eautomatic voltage sensitive relay\u003c\/strong\u003e, long 16.4ft cable, and IP68 rating deliver good value for most 12V dual-battery setups, though owners of ternary lithium batteries should choose a different product.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this kit charge both batteries while driving?\u003c\/strong\u003e\u003cbr\u003eYes, the voltage sensitive relay connects the auxiliary battery to allow simultaneous charging from the alternator when the main battery is at charge voltage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be installed outdoors or on a boat?\u003c\/strong\u003e\u003cbr\u003eYes, the isolator has an IP68 waterproof rating designed to withstand wet and harsh conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it compatible with ternary lithium batteries?\u003c\/strong\u003e\u003cbr\u003eNo, the product is explicitly not compatible with ternary lithium battery chemistries.\u003c\/p\u003e","brand":"POWO Carlife","offers":[{"title":"Default Title","offer_id":48609389412571,"sku":"B0D24WBQLF","price":63.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71gtfHbJ9wL._AC_SL1500.jpg?v=1778352141","url":"https:\/\/gearmusthave.com\/products\/battery-isolator-12v-with-16-4ft-7awg-cable-kit-smart-140a-split","provider":"GearMustHave","version":"1.0","type":"link"}