{"product_id":"80-amp-relay-12v-continuous-duty-solenoid-relay-battery","title":"80-Amp Relay 12V Continuous Duty Solenoid Relay Battery","description":"\u003cp\u003e\u003cstrong\u003eThe MaySpare 80-Amp 12V continuous-duty solenoid is a heavy-duty battery isolator and relay designed to switch and protect dual-battery systems under high current loads.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact, rugged relay provides an easy way to add a secondary battery, isolate starting and auxiliary batteries, or route heavy loads without complex wiring. Built for continuous 12V operation with a high mechanical life, it handles regular duty cycles and short current surges while including the mounting hardware and insulated caps needed for straightforward installation.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this relay protect and manage two batteries?\u003c\/h3\u003e\n\u003cp\u003eThe relay isolates two battery banks so one can run accessories while keeping the starter battery reserved. When energized it connects both batteries for charging; when de-energized it separates them to prevent unwanted discharge. It’s ideal for vehicles, marine craft, and solar or accessory systems that need reliable battery control.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eContinuous current rating: 80 A for sustained operation.\u003c\/li\u003e\n  \u003cli\u003eSurge capacity: up to 150 A for short switching events.\u003c\/li\u003e\n  \u003cli\u003eCopper contacts with silver-plated pins for improved conductivity and wear resistance.\u003c\/li\u003e\n  \u003cli\u003eNormally-open design to keep batteries separated until the relay receives control voltage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the electrical and mechanical specifications to know?\u003c\/h3\u003e\n\u003cp\u003eThis solenoid runs on 12 VDC and is built for repeated operation with a long mechanical life. It supports momentary high-current switching and a continuous duty window suitable for most vehicle accessory loads, but requires attention to duty cycle in heavy-load scenarios.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRated voltage: 12 VDC.\u003c\/li\u003e\n  \u003cli\u003eContinuous current: 80 A; maximum switching pulse: 150 A (brief).\u003c\/li\u003e\n  \u003cli\u003eMax switching power: approximately 2000 W during short events.\u003c\/li\u003e\n  \u003cli\u003eDesigned for roughly 100,000 mechanical cycles of service.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I install it and what’s included in the kit?\u003c\/h3\u003e\n\u003cp\u003eThe relay ships with mounting and terminal hardware so you can mount it securely and make clean power connections. Four large 100 A terminals handle the heavy load wiring and four smaller terminals tie into original power or control circuits; insulated red caps protect exposed posts.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIncludes 4 large 100 A terminals for load connections.\u003c\/li\u003e\n  \u003cli\u003eIncludes 4 small control terminals for original power wiring.\u003c\/li\u003e\n  \u003cli\u003eFour insulated red terminal caps included for safety and corrosion protection.\u003c\/li\u003e\n  \u003cli\u003eMounting hardware and normally-open configuration; follow vehicle wiring best practices.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat operational limits or usage tips should I consider?\u003c\/h3\u003e\n\u003cp\u003eThe relay should receive a steady control voltage to operate as intended; continuous heavy loading for hours at a time will raise temperature and may require cooling or rest periods. For extended duty or high-current runs, plan wiring gauge and fusing appropriately to protect the circuit.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRequires stable control voltage for reliable switching.\u003c\/li\u003e\n  \u003cli\u003eContinuous heavy use recommended in multi-hour increments with cooling breaks.\u003c\/li\u003e\n  \u003cli\u003eUse correct wire gauge and fuse sizing to match 80 A continuous rating and surge capability.\u003c\/li\u003e\n  \u003cli\u003eCompatible replacement for several OEM part numbers (reference compatibility list when replacing units).\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? Install the MaySpare 80A 12V continuous-duty solenoid if you’re adding a secondary battery to a truck, RV, boat, or off-grid setup and need a durable, straightforward isolator\/relay that supports high currents and repeated cycles. It’s suited to mechanics, installers, DIYers, and fleet operators who want a compact, serviceable relay with included terminals and protective caps. If you’re planning prolonged high-load operation, pair it with proper wiring, fusing, and periodic cooling intervals for longest life.\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 relay handle continuous charging of a secondary battery?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — it’s rated for 80 A continuous at 12 V, suitable for routine charging, but monitor heat during prolonged heavy use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the kit include mounting hardware and terminal covers?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the package contains mounting hardware, four large and four small terminals, plus four insulated red terminal caps.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"MaySpare","offers":[{"title":"Default Title","offer_id":48087030005918,"sku":"B07MV4WJ7K","price":32.75,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/mayspare-front-view-relay.jpg?v=1785914603","url":"https:\/\/northtrailauto.ca\/products\/80-amp-relay-12v-continuous-duty-solenoid-relay-battery","provider":"North Trail Auto","version":"1.0","type":"link"}