{"product_id":"blue-sea-ml-acr-automatic-charging-relay-12vdc-500a","title":"Blue Sea ML-ACR Automatic Charging Relay DC 500A.","description":"\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0\"\u003eBlue Sea Systems ML-ACR Automatic Charging Relays\u003c\/h2\u003e\n\u003ch3 class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eModels:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"marker:text-quiet list-disc\"\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eML-ACR Automatic Charging Relay - 12V DC 500A (\u003cstrong\u003e7620\u003c\/strong\u003e-BSS)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eML-ACR Automatic Charging Relay - 24V DC 500A (\u003cstrong\u003e7621\u003c\/strong\u003e-BSS)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eThese ML-ACR relays automatically manage the charging of two large battery banks and allow paralleling of batteries for emergency starting, supporting high-output alternators with a 500 Amp continuous rating. Featuring a magnetic latching (bi-stable) relay, they draw very low current (\u0026lt;40mA) in stable states and moderate current briefly when switching. Dual sensing allows charge monitoring on both battery banks.\u003c\/p\u003e\n\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0\"\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"marker:text-quiet list-disc\"\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eAutomatically combines batteries during charging and isolates when discharging or starting engine\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eMagnetic Latch (ML) draws very low current (\u0026lt;40mA) during steady states\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eDual sensing charge on two battery banks\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eStart Isolation (SI): temporarily isolates House loads during engine cranking to protect sensitive electronics\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eEngine Isolation (EI): isolates two engines while running to protect electronics and maximize alternator output\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eSupports 4\/0 AWG x 2 cable size\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eManual control: No (7620-BSS), Yes (for manual control models)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eRemote LED output for status indication\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e3\/8\" - 16 (M10) tin-plated copper studs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eSwitching cycles up to 100,000\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eOperating temperature from -10°C to 60°C\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0\"\u003eSpecifications Comparison\u003c\/h2\u003e\n\u003cdiv class=\"group relative\"\u003e\n\u003cdiv class=\"w-full overflow-x-auto md:max-w-[90vw] border-subtlest ring-subtlest divide-subtlest bg-transparent\"\u003e\n\u003ctable class=\"border-subtler my-[1em] w-full table-auto border-separate border-spacing-0 border-l border-t\"\u003e\n\u003cthead class=\"bg-subtler\"\u003e\n\u003ctr\u003e\n\u003cth class=\"border-subtler p-sm break-normal border-b border-r text-left align-top\"\u003eFeature\u003c\/th\u003e\n\u003cth class=\"border-subtler p-sm break-normal border-b border-r text-left align-top\"\u003e7620-BSS (12V DC)\u003c\/th\u003e\n\u003cth class=\"border-subtler p-sm break-normal border-b border-r text-left align-top\"\u003e7621-BSS (24V DC)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e12V DC\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e24V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eContinuous Rating\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e500A\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e500A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eIntermittent Rating (5 min)\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e700A\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e700A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eCranking Rating (30 sec)\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e1450A DC\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e1450A DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eAmperage Operating Current\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e13mA\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e13mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eCurrent When Changing State\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e\u0026lt;7.0A\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e\u0026lt;7.0A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eManual Control\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eNo\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eEngine Isolation\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eYes\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eStart Assist\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eYes\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eStart Isolation\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eYes\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eTerminal Stud Torque\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e140 in-lb (15.82 Nm)\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e140 in-lb (15.82 Nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eCable Size\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e4\/0 AWG x 2\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e4\/0 AWG x 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eStud Size\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e3\/8\" - 16 (M10)\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e3\/8\" - 16 (M10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003eSwitching Cycles\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e100,000\u003c\/td\u003e\n\u003ctd class=\"px-sm border-subtler min-w-[48px] break-normal border-b border-r\"\u003e100,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bg-base border-subtler shadow-subtle pointer-coarse:opacity-100 right-xs absolute bottom-0 flex rounded-lg border opacity-0 transition-opacity group-hover:opacity-100 [\u0026amp;\u0026gt;*:not(:first-child)]:border-subtle [\u0026amp;\u0026gt;*:not(:first-child)]:border-l\"\u003e\n\u003cdiv class=\"flex\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"flex\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"mb-2 mt-4 font-display font-semimedium text-base first:mt-0\"\u003eWhat’s In The Box\u003c\/h2\u003e\n\u003cul class=\"marker:text-quiet list-disc\"\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eML-ACR Automatic Charging Relay (model-specific)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli class=\"py-0 my-0 prose-p:pt-0 prose-p:mb-2 prose-p:my-0 [\u0026amp;\u0026gt;p]:pt-0 [\u0026amp;\u0026gt;p]:mb-2 [\u0026amp;\u0026gt;p]:my-0\"\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eSPDT Remote Control Contura Switch - ON-OFF-ON\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Blue Sea Systems","offers":[{"title":"12V","offer_id":42402528690272,"sku":"BSS7620","price":232.95,"currency_code":"USD","in_stock":false},{"title":"24V","offer_id":42402528723040,"sku":"BSS7621","price":227.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0620\/1927\/2800\/files\/BSS7620.jpg?v=1748424680","url":"https:\/\/newportmarinesupply.com\/products\/blue-sea-ml-acr-automatic-charging-relay-12vdc-500a","provider":"Newport Marine Supply","version":"1.0","type":"link"}