{"product_id":"aims-power-300a-dual-battery-isolator","title":"AIMS Power 300A Dual Battery Isolator","description":"\u003ch2\u003e\u003cstrong\u003eAIMS Power BATISO300 – 300A Automatic Dual Battery Sensing Isolator\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe AIMS Power BATISO300 Dual Battery Sensing Isolator is designed for 12V dual battery systems that use a starting battery and an auxiliary battery. This automatic voltage-based isolator monitors both batteries and connects them when either battery exceeds 13.2V. When the full battery system drops below 12.7V, the solenoid opens and isolates the starter battery from the auxiliary battery. This helps protect the starting battery from being drained by auxiliary loads while still allowing auxiliary battery charging during vehicle operation. Rated for 300A max continuous current, the BATISO300 is a practical battery management accessory for RVs, vans, overland builds, service vehicles, work trucks, and other 12V mobile power systems.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eAutomatic Dual Battery Isolation for 12V Systems\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThis AIMS Power battery isolator is made for 12V systems with a main starting battery and auxiliary battery. Its automatic voltage-based operation eliminates the need to tie directly into ignition wiring for standard isolator behavior, helping simplify installation planning.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eDual Sensing Design Monitors Both Batteries\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe BATISO300 monitors both the starting battery and auxiliary battery. If either battery exceeds 13.2V, the isolator connects the batteries; when system voltage drops below 12.7V, it opens the solenoid to isolate the starter battery from the auxiliary battery.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSupports Charging from Alternator or External Sources\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe dual sensing feature allows the main battery to charge from solar or an external charger connected on the auxiliary side once the auxiliary battery reaches 13.2V. This helps support flexible charging layouts for mobile power systems when properly configured.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eOptional Manual Switch Control Available\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe optional manual switch, part number BATISOSW, allows manual control for linking the two batteries together with a push of a button. When used, the isolator can allow current flow for 60 seconds without the alternator, even if both batteries are below 12.7V.\u003c\/p\u003e\n\u003c!-- Responsive Image\/Text Blocks --\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; align-items: center; justify-content: center; padding: 0;\"\u003e\n\u003cdiv class=\"responsive-half\" style=\"flex: 1 1 300px; max-width: 50%; padding: 0 4px;\"\u003e\u003cimg height=\"1000\" width=\"1000\" alt=\"AIMS Power BATISO300 300A automatic dual battery sensing isolator for 12V systems\" class=\"responsive-image\" style=\"width: 100%; height: auto;\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0761\/5781\/2888\/files\/Iso-1000-CU-wht-600x600.webp?v=1780476602\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"responsive-half\" style=\"flex: 1 1 300px; max-width: 50%; padding: 1rem; text-align: center;\"\u003e\n\u003cp\u003eThis AIMS Power 300A dual battery sensing isolator helps manage charging between a starting battery and auxiliary battery in compatible 12V vehicle and mobile power systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Image Block 2 --\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; align-items: center; justify-content: center; padding: 0;\" class=\"image-block-2\"\u003e\n\u003cdiv class=\"responsive-half\" style=\"flex: 1 1 300px; max-width: 50%; padding: 1rem; text-align: center;\"\u003e\n\u003cp\u003eWith automatic voltage sensing, 13.2V auto-on behavior, 12.7V auto-off behavior, 300A max continuous current, and IP65 splash-proof protection, the BATISO300 supports practical dual battery management.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"responsive-half\" style=\"flex: 1 1 300px; max-width: 50%; padding: 0 4px;\"\u003e\u003cimg height=\"1000\" width=\"1000\" alt=\"AIMS Power 12V dual battery isolator for auxiliary battery charging and starter battery protection\" class=\"responsive-image\" style=\"width: 100%; height: auto;\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0761\/5781\/2888\/files\/BATISO300-1K-w-text-REV-600x600.webp?v=1780476602\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Mobile Stack Fix --\u003e\n\u003cstyle\u003e\n@media(max-width:768px) {\n  .responsive-half { max-width: 100% !important; flex: 1 1 100% !important; }\n  .responsive-image { width: 100% !important; height: auto !important; }\n  .image-block-2 { flex-direction: column-reverse !important; }\n}\n\u003c\/style\u003e\n\u003ch3\u003eAIMS Power BATISO300 Features \u0026amp; Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e300A max continuous current:\u003c\/strong\u003e Supports high-current 12V dual battery applications when properly installed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual sensing operation:\u003c\/strong\u003e Monitors both the starting battery and auxiliary battery for automatic connection behavior.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic voltage-based control:\u003c\/strong\u003e Connects above 13.2V and isolates below 12.7V to help protect the starter battery.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo ignition tie-in required:\u003c\/strong\u003e Voltage-based operation can reduce installation complexity compared with ignition-triggered setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal charging support:\u003c\/strong\u003e Allows the main battery to be charged through the auxiliary side when voltage conditions are met.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional manual switch:\u003c\/strong\u003e Compatible with the BATISOSW manual switch for temporary manual battery linking.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty and support:\u003c\/strong\u003e Backed by a 3-year warranty and lifetime tech support.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background: #EFE9DC; border: 1px solid #D6D0C4; border-radius: 8px; padding: 24px; text-align: center; margin: 2rem 0; color: #1f1f1f;\"\u003e\n\u003cp style=\"margin: 0 0 8px 0;\"\u003e\u003cstrong\u003eNeed help choosing the right dual battery protection setup?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 14px 0;\"\u003eContact TrueStead Supply for battery isolator guidance, system comparison, and quote support.\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 14px 0;\"\u003e✔ Dual battery support    ✔ Alternator charging guidance    ✔ RV, fleet, and off-grid-ready options\u003c\/p\u003e\n\u003ca style=\"display: inline-block; padding: 0.75rem 1.5rem; background-color: #2f4f2f; color: #ffffff; text-decoration: none; font-weight: bold; border-radius: 6px;\" href=\"https:\/\/www.truesteadsupply.com\/pages\/contact-us\"\u003eContact Us for a Quote\u003c\/a\u003e\n\u003c\/div\u003e\n\u003ch3\u003eAIMS Power BATISO300 Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-bottom: 2rem; border: 1px solid #D6D0C4;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003eAIMS Power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u003cstrong\u003eModel \/ SKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003eBATISO300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003eAutomatic dual battery sensing isolator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u003cstrong\u003eSystem Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e12V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u003cstrong\u003eAuto-On Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u0026gt;13.2V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u003cstrong\u003eAuto-Off Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e12.7V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u003cstrong\u003eTurn-On Delay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e5 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u003cstrong\u003eTurn-Off Delay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e10 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u003cstrong\u003eMax Continuous Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e300A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u003cstrong\u003eStandby Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u0026lt;5mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u003cstrong\u003eWeather Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003eIP65 splash proof\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u003cstrong\u003eOptional Accessory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003eManual switch, part # BATISOSW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u003cstrong\u003eManual Switch Function\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003eAllows current flow for 60 seconds without the alternator, even if both batteries are below 12.7V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #D6D0C4; padding: 8px;\"\u003e3-year warranty and lifetime tech support\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eAIMS Power BATISO300 Info\u003c\/h4\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0761\/5781\/2888\/files\/BATISO300-022026.pdf?v=1780476624\" target=\"_blank\" rel=\"noopener\"\u003eAIMS Power BATISO300 Smart Battery Isolator Manual\u003c\/a\u003e\u003c\/p\u003e","brand":"Aims Power","offers":[{"title":"Default Title","offer_id":49189904416920,"sku":"BATISO300","price":121.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0761\/5781\/2888\/files\/BATISO300-1K-w-text-REV-600x600.webp?v=1780476602","url":"https:\/\/www.truesteadsupply.com\/products\/aims-power-300a-dual-battery-isolator","provider":"TrueStead Supply","version":"1.0","type":"link"}