{"product_id":"stinger-dual-battery-isolator-sgp32-12v-200a-continuous-500a-surge-relay-based-water-resistant","title":"STINGER dual battery isolator SGP32 12V 200A continuous 500A surge — relay-based, water-resistant","description":"\u003cp\u003e\u003cstrong\u003eThe STINGER SGP32 is a 12V, high-current dual battery isolator and relay that safely separates a vehicle’s start battery from a secondary battery while allowing up to 200A continuous charging and 500A surge transfer.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for cars, trucks, marine craft and off-road rigs, this compact isolator combines a heavy-duty relay with a robust isolation mechanism to keep your main battery reserved for engine starts while powering accessories from a secondary battery. Built with water-resistant phenolic plastic and engineered for long life, the SGP32 fits into installations where dependable high-current switching and corrosion resistance matter.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the SGP32 protect my primary battery?\u003c\/h3\u003e\n\u003cp\u003eThe isolator prevents accessory loads from draining the vehicle’s starting battery by routing alternator charge to a separate secondary battery while keeping the two batteries electrically separated when the engine is off. As a relay-based system, it automatically connects for charging and disconnects to protect starting capacity.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAutomatic relay engagement when alternator voltage is present\u003c\/li\u003e\n  \u003cli\u003ePrevents accessory draw from draining the starter battery\u003c\/li\u003e\n  \u003cli\u003eSupports a dedicated house or audio battery for accessories\u003c\/li\u003e\n  \u003cli\u003eReduces risk of being stranded due to accessory drain\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat electrical capacity and durability does it offer?\u003c\/h3\u003e\n\u003cp\u003eThe SGP32 is rated for continuous currents up to 200 amps with the ability to handle 500-amp surge currents, making it suitable for high-power audio systems and demanding accessory loads. Its mechanical components are specified for a long operating life to withstand frequent charge cycles.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e200A continuous current handling for heavy loads\u003c\/li\u003e\n  \u003cli\u003eUp to 500A surge capacity to accommodate startup spikes\u003c\/li\u003e\n  \u003cli\u003e100,000 mechanical cycle life for reliable repeated switching\u003c\/li\u003e\n  \u003cli\u003ePhenolic housing resists moisture and environmental wear\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs the SGP32 compatible with my vehicle and charging system?\u003c\/h3\u003e\n\u003cp\u003eThis isolator is universally compatible with 12V charging systems and works with standard alternators, smart charging systems, and most vehicle electrical setups. Its straightforward wiring and robust terminals simplify installation into cars, boats, ATVs, or trucks without special alternator modifications.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWorks with any 12V alternator or charging configuration\u003c\/li\u003e\n  \u003cli\u003eSuitable for automotive, marine, and powersports applications\u003c\/li\u003e\n  \u003cli\u003eCompact footprint fits common mounting locations\u003c\/li\u003e\n  \u003cli\u003eWater-resistant construction for damp environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I use the SGP32 with an audio or accessory battery?\u003c\/h3\u003e\n\u003cp\u003eConnect the isolate relay between the vehicle’s charging output and the secondary battery; the relay will close to charge both batteries when the engine runs and open when the engine stops, isolating the main battery. This setup lets you run stereos, winches, refrigerators, or lighting from the secondary battery while preserving starting power.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInstall on the alternator output or battery feed line\u003c\/li\u003e\n  \u003cli\u003eWire secondary battery to accessory loads and audio systems\u003c\/li\u003e\n  \u003cli\u003eEnsure secure terminal connections and proper fuse protection\u003c\/li\u003e\n  \u003cli\u003eMount away from excessive heat and in a protected, ventilated spot\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this product is for: The STINGER SGP32 is aimed at drivers and installers who need a heavy-duty, reliable way to manage dual-battery systems—car audio enthusiasts, overland and off-road vehicle owners, marine boaters, and anyone adding high-draw accessories. If you want to protect your starter battery while supplying consistent charge and high-current capability to a secondary battery in wet or rough environments, this isolator gives a rugged, long-lasting solution without complex electronics.\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 the SGP32 handle high-power car audio systems?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It supports 200A continuous and 500A surge currents suitable for most high-power audio installations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the isolator safe for marine or off-road use?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The unit uses water-resistant phenolic plastic and is built to withstand moisture-prone environments.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"STINGER","offers":[{"title":"Default Title","offer_id":55170255159639,"sku":"B001HBYXVS","price":85.09,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/stinger-sgp32-front-view.jpg?v=1790425983","url":"https:\/\/britishgarage.co.uk\/products\/stinger-dual-battery-isolator-sgp32-12v-200a-continuous-500a-surge-relay-based-water-resistant","provider":"British Garage","version":"1.0","type":"link"}