{"product_id":"12v-140a-automatic-dual-battery-isolator-voltage-sensitive-relay-kit","title":"12V 140A Automatic Dual Battery Isolator Voltage Sensitive Relay Kit","description":"\u003cp\u003e\u003c\/p\u003e\u003ch2\u003e12V 140A Automatic Dual Battery Isolator – Voltage Sensitive Relay (VSR)\u003c\/h2\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003eThe 12V 140A Automatic Dual Battery Isolator is a compact Voltage Sensitive Relay (VSR) designed to manage charging in dual-battery vehicle installations.\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003eIdeal for vehicles fitted with a separate leisure or auxiliary battery, the isolator automatically connects the starter and auxiliary batteries when sufficient charging voltage is detected, allowing the vehicle's alternator to charge both batteries. When the engine is switched off and battery voltage falls, the batteries are automatically disconnected, helping prevent accessories connected to the auxiliary battery from draining the vehicle's starter battery.\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003eWith no manual switching required, the VSR continuously monitors starter battery voltage. At approximately 13.3V the relay engages, connecting the auxiliary battery to the charging system. When voltage falls below approximately 12.8V, the relay automatically disconnects after a short delay.\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cbr\u003e\u003cbr\u003e\u003cul\u003e\n\u003cbr\u003e\t\u003cli\u003e\n\u003cbr\u003e\t\u003cp\u003e12V automatic dual battery isolator\u003c\/p\u003e\n\u003cbr\u003e\t\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003e\n\u003cbr\u003e\t\u003cp\u003eHeavy-duty 140A continuous current rating\u003c\/p\u003e\n\u003cbr\u003e\t\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003e\n\u003cbr\u003e\t\u003cp\u003e170A intermittent current capacity\u003c\/p\u003e\n\u003cbr\u003e\t\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003e\n\u003cbr\u003e\t\u003cp\u003eVoltage Sensitive Relay (VSR) operation\u003c\/p\u003e\n\u003cbr\u003e\t\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003e\n\u003cbr\u003e\t\u003cp\u003eAutomatically connects auxiliary battery at approximately 13.3V\u003c\/p\u003e\n\u003cbr\u003e\t\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003e\n\u003cbr\u003e\t\u003cp\u003eAutomatically disconnects at approximately 12.8V\u003c\/p\u003e\n\u003cbr\u003e\t\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003e\n\u003cbr\u003e\t\u003cp\u003eApprox. 5-second switching delay\u003c\/p\u003e\n\u003cbr\u003e\t\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003e\n\u003cbr\u003e\t\u003cp\u003eHelps protect the starter battery from auxiliary electrical loads\u003c\/p\u003e\n\u003cbr\u003e\t\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003e\n\u003cbr\u003e\t\u003cp\u003eAllows alternator charging of an auxiliary or leisure battery\u003c\/p\u003e\n\u003cbr\u003e\t\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003e\n\u003cbr\u003e\t\u003cp\u003eFully automatic operation – no manual switch required\u003c\/p\u003e\n\u003cbr\u003e\t\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003e\n\u003cbr\u003e\t\u003cp\u003eLED status indication\u003c\/p\u003e\n\u003cbr\u003e\t\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003e\n\u003cbr\u003e\t\u003cp\u003eCompact design for convenient vehicle installation\u003c\/p\u003e\n\u003cbr\u003e\t\u003c\/li\u003e\n\u003cbr\u003e\t\u003cli\u003e\n\u003cbr\u003e\t\u003cp\u003eSuitable for cars, vans, motorhomes, campervans, 4x4s, utility vehicles and other suitable 12V applications\u003c\/p\u003e\n\u003cbr\u003e\t\u003c\/li\u003e\n\u003cbr\u003e\n\u003c\/ul\u003e\u003cbr\u003e\u003cbr\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eVoltage:\u003c\/strong\u003e 12V DC\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eContinuous Current:\u003c\/strong\u003e 140A\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eIntermittent Current:\u003c\/strong\u003e 170A\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eCut-In Voltage:\u003c\/strong\u003e Approx. 13.3V\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eCut-Out Voltage:\u003c\/strong\u003e Approx. 12.8V\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eDelay:\u003c\/strong\u003e Approx. 5 seconds\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eOperation:\u003c\/strong\u003e Automatic Voltage Sensitive Relay\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -30°C to +105°C\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e Approx. 67.5 x 67.5 x 53.5mm\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eWeight:\u003c\/strong\u003e Approx. 200g\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003ch3\u003e\u003cstrong\u003eHow It Works\u003c\/strong\u003e\u003c\/h3\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003eWhen the engine is running and the starter battery voltage rises to approximately 13.3V, the isolator automatically connects the auxiliary battery, allowing the alternator to charge both batteries.\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003eAfter the engine is switched off, system voltage begins to fall. Once it drops below approximately 12.8V, the isolator disconnects the auxiliary battery, helping preserve the starter battery for reliable engine starting.\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003eThis makes it ideal for dual-battery installations powering equipment such as lighting, refrigerators, inverters and other 12V accessories from a separate auxiliary battery.\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Designed for suitable 12V charging systems. Compatibility with smart\/variable-voltage alternators and lithium battery installations should be checked before installation. Correct cable sizing and suitable circuit protection must be used according to the application.\u003c\/p\u003e","brand":"ORO2U","offers":[{"title":"Default Title","offer_id":57543470023029,"sku":"44-3596","price":0.0,"currency_code":"GBP","in_stock":false}],"url":"https:\/\/www.smxoffroad.com\/products\/12v-140a-automatic-dual-battery-isolator-voltage-sensitive-relay-kit","provider":"SMXOFFROAD Ltd","version":"1.0","type":"link"}