{"product_id":"blue-sea-battery-switch-300a-dual-circuit-black-78348","title":"Blue Sea 300A Black Mini m-Series Dual Circuit+ Battery Switch","description":"\u003ch2\u003eBlue Sea m-Series 300A Dual Circuit Plus: Simplified Battery Management\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eBlue Sea m-Series Dual Circuit Plus Battery Switch\u003c\/strong\u003e offers a sophisticated solution for managing dual battery banks in marine, caravan, and 4WD applications. Unlike standard selector switches, this unit simplifies the switching process by simultaneously connecting two isolated battery banks to their respective loads with a single ON position. Ideally suited for \u003cstrong\u003e12V and 24V systems\u003c\/strong\u003e (up to 32V DC max), it ensures your start battery remains reserved for engine cranking while your house battery powers onboard electronics.\u003c\/p\u003e\n\n\u003ch3\u003eIsolate Start and House Circuits Automatically\u003c\/h3\u003e\n\u003cp\u003eOne of the primary risks in a dual battery setup is accidentally draining the starting battery by leaving a traditional selector switch in the \"Both\" position. The \u003cstrong\u003eDual Circuit Plus\u003c\/strong\u003e design eliminates this common error. When switched to \u003cstrong\u003eON\u003c\/strong\u003e, it mechanically connects the start battery to the engine circuit and the house battery to the distribution panel, yet keeps them electrically isolated. This ensures that voltage drops or heavy loads on the house circuit do not affect the starting battery, providing peace of mind when anchored or camped for extended periods.\u003c\/p\u003e\n\n\u003ch3\u003eEmergency Parallel Functionality\u003c\/h3\u003e\n\u003cp\u003eIn the event of a flat starting battery, the switch features a \u003cstrong\u003eCOMBINE\u003c\/strong\u003e position. This effectively parallels both battery banks, allowing you to utilise the house battery to assist in starting the engine. This emergency cross-over capability is essential for safety at sea or in remote locations, ensuring you have a backup power source readily available without needing to use jumper leads.\u003c\/p\u003e\n\n\u003ch3\u003eCompact, Durable, and Safe Design\u003c\/h3\u003e\n\u003cp\u003eDesigned for the harsh marine environment, the m-Series switches feature \u003cstrong\u003etinned copper studs\u003c\/strong\u003e for maximum conductivity and corrosion resistance. The \u003cstrong\u003e3\/8\"-16 (Approx. M10) stud terminals\u003c\/strong\u003e are designed to accept heavy-duty ring terminals and lugs up to \u003cstrong\u003e4\/0 AWG (approx. 120mm²)\u003c\/strong\u003e. The compact footprint makes it ideal for crowded dashboards or tight electrical lockers where space is at a premium.\u003c\/p\u003e\n\u003cp\u003eFurthermore, the \u003cstrong\u003emake-before-break contact design\u003c\/strong\u003e ensures seamless switching between battery banks without interrupting power to sensitive electronics, such as GPS units, engine ECUs, or audio systems. The switch is also \u003cstrong\u003eignition protected\u003c\/strong\u003e, making it safe for installation on petrol-powered boats.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual Circuit Plus technology:\u003c\/strong\u003e Switches two isolated battery banks simultaneously\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmergency Combine:\u003c\/strong\u003e Parallels batteries for emergency starting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e300A Continuous Rating:\u003c\/strong\u003e Handles significant loads suitable for most marine and RV setups\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIgnition Protected:\u003c\/strong\u003e Safe for installation aboard petrol-powered vessels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Mounting:\u003c\/strong\u003e Case design allows surface, front panel, or rear panel mounting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Conductivity:\u003c\/strong\u003e Tinned copper studs ensure optimal power transfer\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSecure Your Power System\u003c\/h3\u003e\n\u003cp\u003eUpgrade your battery management with a switch that prioritises reliability and ease of use. \u003cstrong\u003eInstall the Blue Sea m-Series Dual Circuit Plus today\u003c\/strong\u003e for a professional, simplified power system that protects your starting capacity while keeping your accessories running.\u003c\/p\u003e","brand":"Blue Sea","offers":[{"title":"Default Title","offer_id":42029958070333,"sku":"BS-6011200B","price":89.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0602\/3918\/3933\/files\/blue-sea-m-series-dual-circuit-plus-switch-BS-6011200B.png?v=1769645354","url":"https:\/\/www.solar4rvs.com.au\/products\/blue-sea-battery-switch-300a-dual-circuit-black-78348","provider":"Solar 4 RVs","version":"1.0","type":"link"}