{"product_id":"blue-sea-systems-m-acr-automatic-charging-relay-65a","title":"Blue Sea Systems m-ACR Automatic Charging Relay 12V Atd. 65A configurable multi-mode battery protector","description":"\u003cp\u003e\u003cstrong\u003eBlue Sea Systems m-ACR 65A is a configurable automatic charging relay that lets you select timer disconnect, low-voltage disconnect, automatic charging relay, or solenoid behaviors to protect and manage 12V battery systems.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDesigned for marine, RV, and off-grid 12V installations, the m-ACR 65A provides flexible battery management in a single compact unit. Instead of buying separate devices for timed loads, low-voltage protection, or charge isolation, this relay can be set up to perform the role you need — from joining batteries during charging to disconnecting nonessential loads when voltage falls. Its single-side sensing and simple 12V control options make it especially useful with starter and larger auxiliary batteries such as AGMs.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the m-ACR protect batteries during discharge?\u003c\/h3\u003e\n\u003cp\u003eWhen configured as a low-voltage disconnect, the m-ACR monitors battery voltage and will open the relay to isolate loads before the battery reaches a harmful level. This helps preserve reserve capacity for essential systems and prevents deep discharge that shortens battery life.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAdjustable disconnect thresholds to suit battery chemistry and system needs\u003c\/li\u003e\n\u003cli\u003eAutomatic reconnection once the voltage recovers or when charging is detected\u003c\/li\u003e\n\u003cli\u003eCan work alongside timer disconnect mode for staged protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIn what way can it act as a timer disconnect for nonessential loads?\u003c\/h3\u003e\n\u003cp\u003eConfigured as a timer disconnect, the m-ACR will close the relay when a 12V trigger appears and begin a countdown when the trigger is removed. After a preset duration it will open again, letting you run accessories for a controlled interval without draining the battery indefinitely.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTimer ranges from 15 minutes up to 4 hours to fit common use cases\u003c\/li\u003e\n\u003cli\u003eIdeal for courtesy lights, entertainment systems, or auxiliary pumps\u003c\/li\u003e\n\u003cli\u003ePrevents accidental overnight drain by automatically cutting power\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat does the automatic charging relay (ACR) function do?\u003c\/h3\u003e\n\u003cp\u003eIn ACR mode the device parallels two battery banks when a charging source raises the starter battery voltage, then isolates them when the system begins to discharge. This lets alternators or chargers replenish both batteries while keeping them separated during engine-off periods for reliable starting and longer auxiliary service.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-side sensing monitors the start battery voltage for reliable connect\/disconnect\u003c\/li\u003e\n\u003cli\u003eSuitable for charging AGMs and larger auxiliary batteries without manual switching\u003c\/li\u003e\n\u003cli\u003ePrevents one battery from discharging the other during heavy loads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan it be used like a simple solenoid or remote switch?\u003c\/h3\u003e\n\u003cp\u003eYes — in solenoid mode a 12V control signal will directly open or close the relay without any timing delay. This gives you straightforward remote on\/off control for accessories or battery connections where immediate switching is desired.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFast, delay-free switching on a 12V command\u003c\/li\u003e\n\u003cli\u003eUseful for integration with existing control panels or alarms\u003c\/li\u003e\n\u003cli\u003eCompact footprint for tight installation spaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The Blue Sea Systems m-ACR 65A is aimed at boaters, RV owners, and small off-grid system builders who want one versatile device to handle charging isolation, timed accessory control, low-voltage protection, or a simple remote-controlled solenoid. If you need reliable 12V battery management without adding multiple dedicated modules — especially when using starter batteries and larger auxiliary AGMs — the m-ACR delivers configurable options in a single, serviceable package.\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 voltage does the m-ACR 65A work with?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It’s made for 12V systems and supports starter and auxiliary battery configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can the timer be adjusted?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Timer settings range from 15 minutes to 4 hours for timed disconnects.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Blue Sea Systems","offers":[{"title":"Default Title","offer_id":48030832853153,"sku":"B06XT6PDLZ","price":271.66,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0758\/6532\/5729\/files\/blue-sea-systems-m-acr-65a-front-panel.jpg?v=1791412904","url":"https:\/\/canadiansporting.ca\/products\/blue-sea-systems-m-acr-automatic-charging-relay-65a","provider":"Canadian Sporting","version":"1.0","type":"link"}