{"product_id":"nvx-dual-sensing-smart-relay-battery-isolator-200a-continuous-microprocessor-controlled-black","title":"NVX Dual Sensing Smart Relay Battery Isolator — 200A Continuous, Microprocessor-Controlled (Black)","description":"\u003cp\u003e\u003cstrong\u003eThe NVX Dual Sensing Smart Relay is a microprocessor-controlled battery isolator that intelligently separates a second battery for audio or accessories while preserving full voltage and providing up to 200A continuous power.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf you run an aftermarket stereo, amplifiers, or accessory bank on a vehicle, boat, or off-grid rig, the NVX Dual Sensing Smart Relay keeps the house battery dedicated to those loads without causing the voltage loss common to diode isolators. Built around a microprocessor, it monitors voltage on both batteries and switches them together only when appropriate, supplying high continuous current and brief surge capability for demanding audio bursts.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the NVX isolator protect my starting battery when I play loud music?\u003c\/h3\u003e\n\n\u003cp\u003eThe unit isolates the auxiliary battery so the starting battery remains reserved for engine cranking. When the NVX detects a charging source and safe voltages on both banks, it will connect them; otherwise it keeps them separate, preventing accessory drain from affecting start power.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDual sensing microprocessor monitors both battery voltages in real time.\u003c\/li\u003e\n  \u003cli\u003e200 amps continuous current capacity for sustained accessory draws.\u003c\/li\u003e\n  \u003cli\u003e300 amps surge handling to accommodate short high-current events from amplifiers.\u003c\/li\u003e\n  \u003cli\u003eLess than 1 amp control draw while engaged to minimize parasitic loss.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill the NVX cause a voltage drop to my audio battery like traditional isolators?\u003c\/h3\u003e\n\n\u003cp\u003eNo — unlike older diode-based isolators that reduce available voltage, this smart relay closes a high-current contact when conditions are right, allowing near-unrestricted charging and discharge between banks. The microprocessor switching ensures efficient transfer and reduces wasted energy.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSolid-state control with a high-current relay rather than series diodes.\u003c\/li\u003e\n  \u003cli\u003eSwitching range 10–16 VDC for compatibility with typical 12V systems.\u003c\/li\u003e\n  \u003cli\u003eEngineered to avoid the constant voltage loss common to passive isolators.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the size and installation considerations for the NVX Smart Relay?\u003c\/h3\u003e\n\n\u003cp\u003eThe NVX is compact and designed for neat mounting in engine bays, trunks, or equipment compartments. Its small footprint fits tight spaces, but you should use appropriately gauged cables and secure mounting to handle high currents safely.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompact dimensions: 2-3\/8\" W x 2-3\/8\" D x 3-3\/4\" H for flexible placement.\u003c\/li\u003e\n  \u003cli\u003eRequires heavy-gauge battery cables rated for 200A continuous loads.\u003c\/li\u003e\n  \u003cli\u003eSimple wiring: sense leads to each battery and main power terminals for switching.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow reliable and power-efficient is the NVX during everyday use?\u003c\/h3\u003e\n\n\u003cp\u003eDesigned for continuous automotive and marine applications, the NVX draws under 1 amp when engaged and uses microprocessor logic to avoid unnecessary switching. Its 200A continuous rating and 300A surge capacity make it robust for repeated duty cycles and transient amplifier demands.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMicroprocessor control reduces false engages and maximizes efficiency.\u003c\/li\u003e\n  \u003cli\u003eLow steady-state draw conserves battery when the relay is closed.\u003c\/li\u003e\n  \u003cli\u003eHigh surge tolerance handles amplifier peaks without damage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The NVX Dual Sensing Smart Relay is aimed at car audio enthusiasts, marine electronics installers, and anyone who needs a dedicated auxiliary battery for stereos, amps, or accessory loads without compromising starting power. If you want efficient charging, minimal voltage loss, and a compact, high-current solution for isolating a second battery, this unit is tailored to that role.\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: Does the NVX require a control switch?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No separate switch is required; the microprocessor senses voltages and operates the relay automatically between 10–16 VDC.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can it handle amplifier power surges?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it supports 200A continuous and up to 300A surge to accommodate short high-current demands.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NVX","offers":[{"title":"Default Title","offer_id":48083995525278,"sku":"B084VVGT4T","price":79.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/nvx-front-view-smart-relay.jpg?v=1785842603","url":"https:\/\/northtrailauto.ca\/products\/nvx-dual-sensing-smart-relay-battery-isolator-200a-continuous-microprocessor-controlled-black","provider":"North Trail Auto","version":"1.0","type":"link"}