{"product_id":"vevor-dual-battery-isolator-12v-300a-with-lcd-manual-automatic-vsr-for-lithium-lead-acid-adjustable-delay","title":"VEVOR Dual Battery Isolator 12V 300A with LCD — Manual\/Automatic VSR for Lithium \u0026 Lead-Acid, Adjustable Delay","description":"\u003cp\u003e\u003cstrong\u003eVEVOR's Dual Battery Isolator is a 12V, 300A voltage-sensitive relay with both manual and automatic modes and an LCD that manages charging between lithium and lead-acid batteries.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for vehicles and off-grid power setups, this smart isolator balances heavy charging loads while protecting each battery bank. It combines a high-current 300A switching capability with an easy-to-read dual voltage display, adjustable delay timing, and selectable manual override. The unit fits trucks, RVs, boats, ATVs, and work vehicles that use two battery systems and need reliable charge routing without complex rewiring.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the VEVOR isolator protect both batteries during charging?\u003c\/h3\u003e\n\n\u003cp\u003eThe isolator monitors voltages and only links battery banks under safe conditions, preventing overcharge or deep discharge. Built-in overvoltage and undervoltage protection keeps each bank within safe limits, while a durable enclosure resists shock and dust for long-term reliability.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eAutomatic VSR connects banks when voltage thresholds are met.\u003c\/li\u003e\n  \u003cli\u003eOvervoltage and undervoltage cutoffs prevent damage.\u003c\/li\u003e\n  \u003cli\u003eSturdy, shockproof housing suited for mobile environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen should I use manual mode instead of automatic mode?\u003c\/h3\u003e\n\n\u003cp\u003eManual mode is ideal when you need to force-charge a depleted starter battery from a charged auxiliary battery or when troubleshooting. One-click switching enables safe reverse charging without jumper cables, letting you start a vehicle quickly while still keeping automatic protection available when you switch back.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eUse manual to jump-start a dead main battery from the auxiliary.\u003c\/li\u003e\n  \u003cli\u003eSwitch back to automatic for normal charge management.\u003c\/li\u003e\n  \u003cli\u003eManual override simplifies emergency starts and diagnostics.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat adjustment options are available for timing and voltage sensing?\u003c\/h3\u003e\n\n\u003cp\u003eThe isolator offers configurable delay and adjustable start-stop voltages so the system fits different battery chemistries and charging sources. The delay function (3–60 seconds) prevents rapid cycling that can wear relays and batteries, and the voltage settings accommodate lithium, lead-acid, and other battery types.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDelay timer adjustable between 3 and 60 seconds to reduce switching frequency.\u003c\/li\u003e\n  \u003cli\u003eStart\/stop voltage settings configurable for varied battery chemistries.\u003c\/li\u003e\n  \u003cli\u003eReal-time voltage readout helps fine-tune system behavior on the fly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow will the LCD help me monitor and diagnose my dual-battery setup?\u003c\/h3\u003e\n\n\u003cp\u003eThe bright dual-voltage LCD shows both battery voltages from 4.5V to 20V, making it straightforward to spot charging faults or imbalances. With instant readouts you can verify alternator output, battery state, and whether the VSR is connected — helping quickly identify wiring or charging problems before they escalate.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDisplays individual battery voltages in real time for easy checks.\u003c\/li\u003e\n  \u003cli\u003eVoltage range covers common battery types and charging states.\u003c\/li\u003e\n  \u003cli\u003eUseful for diagnosing alternator or wiring issues on site.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Installers, fleet managers, RV owners, boaters, off-grid hobbyists, and anyone who runs two-battery systems and needs a robust, configurable charger-splitting solution. Choose this isolator if you want a high-current, flexible VSR with clear voltage feedback and the option to manually assist a depleted starter battery without extra tools.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can this isolator charge lithium and lead-acid batteries together?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The VEVOR isolator supports lithium and lead-acid batteries with adjustable start-stop voltages to match chemistries.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What does the adjustable delay do?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The 3–60 second delay prevents rapid switching between banks, reducing wear on the relay and batteries.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"VEVOR","offers":[{"title":"Default Title","offer_id":48081136320670,"sku":"B0FYF83JNQ","price":87.35,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/vevor-dual-battery-isolator-front-panel.jpg?v=1785797250","url":"https:\/\/northtrailauto.ca\/products\/vevor-dual-battery-isolator-12v-300a-with-lcd-manual-automatic-vsr-for-lithium-lead-acid-adjustable-delay","provider":"North Trail Auto","version":"1.0","type":"link"}