{"product_id":"blue-sea-ml-series-auto-charge-relay-500a-24v","title":"Blue Sea 24V 500A ML Series Auto Charge Relay","description":"\u003ch2\u003eHigh-Capacity 24V Battery Management for Marine and Heavy-Duty Systems\u003c\/h2\u003e \u003cp\u003eManaging multiple battery banks in 24V systems requires robust, reliable switching technology. The \u003cstrong\u003eBlue Sea ML-Series Automatic Charging Relay (ACR)\u003c\/strong\u003e provides a superior solution for automatically managing the charging of two large battery banks, such as a start battery and a house bank. Designed for high-amperage applications, this unit removes the need for manual switching, ensuring your batteries are charged when a source is active and isolated when discharging to prevent accidental depletion of your starting power.\u003c\/p\u003e  \u003ch3\u003eMagnetic Latching Technology for Maximum Efficiency\u003c\/h3\u003e \u003cp\u003eUnlike standard continuous-duty solenoids that generate heat and consume significant power just to stay closed, the ML-Series utilises a \u003cstrong\u003emagnetic latching (bi-stable) mechanism\u003c\/strong\u003e. This advanced design draws very low current (less than 40mA) to monitor terminal voltage in both the \"ON\" or \"OFF\" states. It only draws moderate current for a fraction of a second when changing states. This ensures that your energy goes into charging your batteries, not heating up the relay, making it essential for energy-conscious off-grid and marine setups.\u003c\/p\u003e  \u003ch3\u003eDual Sensing and Smart Isolation\u003c\/h3\u003e \u003cp\u003eThis ACR features intelligent \u003cstrong\u003edual sensing technology\u003c\/strong\u003e, meaning it monitors voltage on both battery banks. If you are charging your house bank via a solar array or a shore charger, the relay will close to top up the start battery. Conversely, when the engine alternator is running, it combines the banks to charge the house battery. \u003c\/p\u003e \u003cp\u003eFor sensitive electronics, the unit offers configurable \u003cstrong\u003eStart Isolation\u003c\/strong\u003e. This feature temporarily isolates the house loads from the engine circuit during cranking, protecting navigation units, sonar, and other sensitive equipment from voltage sags and spikes.\u003c\/p\u003e  \u003ch3\u003eManual Control for Safety and Service\u003c\/h3\u003e \u003cp\u003eWhile the operation is fully automatic, the integrated yellow manual control knob provides complete peace of mind. It allows for:\u003c\/p\u003e \u003cul\u003e \u003cli\u003e \u003cstrong\u003eLock Off:\u003c\/strong\u003e Isolate batteries completely for safe servicing or storage.\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eManual On:\u003c\/strong\u003e Combine batteries for emergency starting if the start battery is low.\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eAuto:\u003c\/strong\u003e The default set-and-forget mode for daily operation.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch3\u003eBuilt for High-Output Environments\u003c\/h3\u003e \u003cp\u003eWith a continuous rating of \u003cstrong\u003e500 Amperes\u003c\/strong\u003e, this relay is engineered to support modern high-output alternators commonly found on large vessels, heavy trucks, and commercial vehicles. The robust construction features \u003cstrong\u003e3\/8\"-16 (Approx. M10) tin-plated copper stud terminals\u003c\/strong\u003e which provide maximum conductivity and corrosion resistance. These long terminals allow for multiple cable lugs to be connected securely (accepting up to 4\/0 AWG or approx. 120mm² cables).\u003c\/p\u003e  \u003ch3\u003eKey Features\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e \u003cstrong\u003e500A Continuous Rating:\u003c\/strong\u003e Handles heavy loads and high-output charging sources reliably.\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eMagnetic Latch (Bi-Stable):\u003c\/strong\u003e Ultra-low power consumption with no heat generation in the hold state.\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eDual Sensing:\u003c\/strong\u003e Bi-directional charging manages inputs from alternators and solar\/shore chargers.\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eSilver Alloy Contacts:\u003c\/strong\u003e Ensures high reliability for switching live loads up to 300A.\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eLED Output:\u003c\/strong\u003e Compatible with remote LEDs to indicate combined, isolated, or lockout states.\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eEngine Isolation:\u003c\/strong\u003e Can be configured to isolate two engines while running to protect individual engine electronics.\u003c\/li\u003e \u003cli\u003e \u003cstrong\u003eIP66 Rating:\u003c\/strong\u003e Protected against powerful water jets, suitable for harsh marine environments.\u003c\/li\u003e \u003c\/ul\u003e  \u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e This unit is the 24V DC model. The ML-Series Remote Control Contura Switch is not included with this SKU (BS-7623B) and is available separately if remote operation is required.\u003c\/p\u003e  \u003ch3\u003eOptimise Your 24V Power System\u003c\/h3\u003e \u003cp\u003eEnsure your batteries are charged efficiently and your starting power is always protected. Upgrade to the \u003cstrong\u003eBlue Sea ML-Series 24V ACR\u003c\/strong\u003e for professional-grade battery management.\u003c\/p\u003e","brand":"Blue Sea","offers":[{"title":"Default Title","offer_id":55056811917651,"sku":"BS-7623B","price":222.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1076\/9324\/4755\/files\/blue-sea-24v-500a-ml-series-auto-charge-relay-bs-7623b.webp?v=1790336303","url":"https:\/\/progradewarehouse.com\/products\/blue-sea-ml-series-auto-charge-relay-500a-24v","provider":"PRO GRADE WAREHOUSE","version":"1.0","type":"link"}