{"product_id":"battery-isolator-12v-kit-140amp-split-charge-relay-automatic-dual","title":"Battery Isolator 12V Kit 140Amp Split Charge Relay - Automatic Dual","description":"\u003cp\u003eOur review of the Battery Isolator 12V Kit 140Amp finds it best suited for owners who need a simple, rugged way to keep an auxiliary battery charged without risking the primary battery. The kit's automatic voltage sensing that cuts in at 13.3 volts and cuts out at 12.8 volts is the single biggest reason to consider it, since it protects the starter battery while allowing reliable charging of an auxiliary battery for marine, RV, ATV or overland use.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSilicone sealed housing:\u003c\/strong\u003e The durable, weather-resistant case helps the relay survive damp or salty environments common on boats and offroad vehicles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage sensitive switching:\u003c\/strong\u003e The relay automatically connects and disconnects based on charging voltage, ensuring the primary battery stays charged for engine starts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e140 amp capacity:\u003c\/strong\u003e The high current rating supports most dual-battery setups for medium sized vehicles and marine systems without frequent overheating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED indicator:\u003c\/strong\u003e A front panel LED gives a quick visual of when the relay is engaged so users can confirm charging status at a glance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete wiring kit:\u003c\/strong\u003e Included 20 ft 6AWG cable and installation hardware simplify mounting and wiring in tight engine bays or battery compartments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis kit suits boaters, RV owners, overlanders and anyone who runs accessories from an auxiliary battery and wants an automatic way to keep it charged without touching the ignition or alternator wiring. The compact relay and long 20 ft cable make it handy where space is limited.\u003c\/p\u003e\u003cp\u003eIt is less appropriate for systems that need programmable charge profiles, smart isolation features beyond voltage sensing, or integration with battery management systems; those users should look at multi-stage charging or DC-DC charger solutions.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eEasy to install with the supplied 6AWG cable and hardware, which many customers praised for simplicity.\u003c\/li\u003e\n\u003cli\u003eProtects the primary battery with clear voltage cut-in and cut-out thresholds so the starter battery remains ready.\u003c\/li\u003e\n\u003cli\u003eSturdy, sealed construction that stands up to marine and offroad conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eSome users reported mixed functionality in a few cases, so results may vary depending on system and installation.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eAutomatic 12V split charge relay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003ePOWO Carlife\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRated current\u003c\/td\u003e\n\u003ctd\u003e140 Amp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage sensing\u003c\/td\u003e\n\u003ctd\u003eCuts in 13.3 V, cuts out 12.8 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring\u003c\/td\u003e\n\u003ctd\u003eIncludes 20 ft 6AWG cable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnvironmental protection\u003c\/td\u003e\n\u003ctd\u003eSilicone sealed interior housing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Battery Isolator 12V Kit 140Amp is a practical, value-oriented choice for users who need a rugged automatic relay to maintain an auxiliary battery without risking their starter battery. Its clear voltage sensing, LED status, and included 20 ft 6AWG wiring make installation straightforward and reliable for typical automotive, marine and recreational use.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDoes the relay require alternator or ignition wiring?\u003c\/strong\u003e\u003cbr\u003eNo. The unit is voltage sensitive and does not require a separate alternator or ignition connection to operate.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it work in a marine environment?\u003c\/strong\u003e\u003cbr\u003eYes. The silicone sealed interior and sturdy housing are designed to withstand harsh weather and marine conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat happens if the relay does not engage?\u003c\/strong\u003e\u003cbr\u003eIf the relay does not engage customers report mixed results; verify installation, cable connections and battery voltages before contacting support.\u003c\/p\u003e","brand":"POWO Carlife","offers":[{"title":"Default Title","offer_id":48156281798875,"sku":"B09LXM2VS2","price":59.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71RgZlMF_rL._AC_SL1500.jpg?v=1768920809","url":"https:\/\/gearmusthave.com\/products\/battery-isolator-12v-kit-140amp-split-charge-relay-automatic-dual","provider":"GearMustHave","version":"1.0","type":"link"}