{"product_id":"mayspare-80-amp-12v-continuous-duty-solenoid-battery-isolator-starter-relay-white-4-pin-spst","title":"MaySpare 80-Amp 12V Continuous Duty Solenoid Battery Isolator \u0026 Starter Relay – White, 4-Pin SPST","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eMeet a versatile solenoid battery isolator and starter relay designed to support dual-battery systems with steady 12V DC performance. The MaySpare unit operates as a normally open switch, enabling controlled engagement between power sources while preserving engine start reliability. Built for continuous duty, this 80-amp device handles everyday demand with a robust 500-amp surge capability and a 2000W switching capacity, making it suitable for RV, marine, and off-road setups.\u003c\/p\u003e\n\n\u003ch3\u003eKey specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eContinuous amperage: 80 A\u003c\/li\u003e\n  \u003cli\u003eSurge max amperage: 500 A\u003c\/li\u003e\n  \u003cli\u003eVoltage: 12V DC\u003c\/li\u003e\n  \u003cli\u003eElectrical life: up to 100,000 mechanical cycles\u003c\/li\u003e\n  \u003cli\u003eContact type: Copper contact with silver pins\u003c\/li\u003e\n  \u003cli\u003eMax switching current: 500 A at 5 ms; max switching power: 2000 W\u003c\/li\u003e\n  \u003cli\u003eNormally Open configuration with attached hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s included and how it helps\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e4 large 100A terminals wired for loading and 4 small terminals for original power connections\u003c\/li\u003e\n  \u003cli\u003e4 insulated red caps to protect connections and edges\u003c\/li\u003e\n  \u003cli\u003eDurable white housing designed for visibility and long-term reliability\u003c\/li\u003e\n  \u003cli\u003eEasy replacement path via compatible units (White Rodgers, Cummins part numbers listed on request)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eReal-world use cases\u003c\/h3\u003e\n\u003cp\u003eIdeal for vehicles or vessels that rely on a secondary battery for accessories, lights, or auxiliary systems while keeping primary starting power separate. The normally open configuration means you can control when the auxiliary system receives charge, reducing risk to starting performance during demanding starts or cold conditions. This is a practical option for DIY installers upgrading dual-battery layouts, as well as professional setups where dependable, fast-switching isolation is valuable.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation notes and operating guidance\u003c\/h3\u003e\n\u003cp\u003eThe kit includes wires and terminals to connect to both the loading circuit and the original power line. It emphasizes a constant voltage approach, with the working cycle suitable for periods of continuous use before a brief pause. Users should follow proper wiring practices to ensure solid connections and secure mounting. If you have questions about compatibility with your specific battery setup, contact the MaySpare support team for guidance.\u003c\/p\u003e\n\n\u003ch3\u003eWhy choose MaySpare\u003c\/h3\u003e\n\u003cp\u003eMaySpare combines durable materials, copper contact with silver pins, and a high-cycle design to support regular, real-world use. The 80A continuous rating paired with a 500A surge capability provides a broad margin for fluctuating loads, while the compact 12V DC footprint fits a variety of installations without demanding more space than necessary. This makes it a practical accessory for upgrading power systems where reliable isolation and quick switching matter, without guaranteeing outcomes—only presenting a clear set of capabilities you can leverage.\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: What is the MaySpare 80-Amp Solenoid Battery Isolator used for?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It enables independent charging of a second battery and safe engine starting by isolating circuits.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does it require constant voltage and how long can it run?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It operates on 12V DC; continuous use is practical for several hours before a cooldown.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"MaySpare","offers":[{"title":"Default Title","offer_id":42466920955989,"sku":"B07MV4WJ7K","price":32.82,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/mayspare-80amp-solenoid-battery-isolator-white-4pin-front.jpg?v=1778052335","url":"https:\/\/plentytorque.co.uk\/products\/mayspare-80-amp-12v-continuous-duty-solenoid-battery-isolator-starter-relay-white-4-pin-spst","provider":"PlentyTorque","version":"1.0","type":"link"}