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Blue Sea Systems 7622 ML-ACR Automatic Charging Relay 12V 500A

Manufacturer

Blue Sea Systems

<p>When electrical reliability can mean the difference between a successful voyage and a dangerous situation, marine professionals and enthusiasts turn to Blue Sea Systems. Founded in 1992, this American manufacturer has built a reputation for creating electrical components specifically engineered to withstand the unforgiving marine environment. Every product reflects a commitment to safety standards and real-world performance that has made Blue Sea Systems a leading name in marine and specialty vehicle electrical systems.</p> <h3>Engineering for the Marine Environment</h3> <p>Blue Sea Systems develops and manufactures dependable AC and DC electrical products for marine and specialized vehicle applications, designed in the USA and engineered to excel in challenging environments. The marine environment presents unique challenges—salt spray, constant vibration, temperature extremes, and moisture exposure—that can quickly degrade inferior electrical components. Blue Sea Systems addresses these challenges through careful material selection, rigorous testing protocols, and designs that prioritize both safety and serviceability. Their components are engineered for marine use and align with the intent of ABYC E-11: AC and DC Electrical Systems on Boats and relevant USCG electrical regulations.</p> <h3>Commitment to Safety Standards</h3> <p>Safety standards aren't just guidelines for Blue Sea Systems—they're fundamental to every product design. All Blue Sea Systems marine battery disconnect switches comply with the ABYC C-7 certification, demonstrating their commitment to meeting and exceeding industry safety requirements. The company maintains ABYC-certified employees across multiple departments, from engineering to technical support, ensuring deep expertise in marine electrical system design and installation standards.</p> <h3>Comprehensive Product Range</h3> <p>Blue Sea Systems offers an extensive catalog designed to address every aspect of marine electrical systems. Their <a href="/7262-blue-sea-systems-circuit-breakers-200260">circuit breakers</a> provide resettable overcurrent protection with trip-free designs and clear trip indication for quick diagnostics. For power management, their <a href="/7262-blue-sea-systems-battery-switches-manual-200149">battery switches</a> offer reliable methods for controlling battery banks and disconnecting loads during storage or emergencies, with ABYC C-7 compliance guaranteed.</p> <p>Monitoring system health is critical aboard any vessel, which is why their <a href="/7262-blue-sea-systems-battery-monitors-volt-meters-200146">battery monitors and volt meters</a> provide accurate real-time data to help operators make informed decisions about power usage and charging. The company's <a href="/7262-blue-sea-systems-terminal-blocks-bus-bars-201059">terminal blocks and bus bars</a> create organized, serviceable connection points that simplify installation and future modifications. For keeping batteries properly charged, Blue Sea Systems offers <a href="/7262-blue-sea-systems-battery-chargers-200141">battery chargers</a> engineered with features like automatic charging relay compatibility and proper charge profile management.</p> <h3>Built by Boaters, for Boaters</h3> <p>Blue Sea Systems was founded based on a commitment to create innovative high quality marine electrical products to improve the safety, simplicity, and reliability of boating, with employees who are active boaters applying their passion to designing, developing, and building products. This firsthand experience translates into practical features like modular layouts, standardized footprints, and installer-centric designs that streamline panel work and serviceability. The result is a product line that addresses real challenges faced on the water, backed by comprehensive technical documentation and support resources that help both professionals and DIY enthusiasts complete installations with confidence.</p>

Part Number

7622
06/01/2036 10:10 PM
Sale Price

$272.28

In Stock (5)

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Usually delivered within 2 days

free shipping

FREE SHIPPING

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Blue Sea Systems 7622 ML-ACR (Magnetic Latch-Automatic Charging Relay) is a 500-amp heavy-duty battery management solution designed for marine applications with large battery banks. This bi-stable relay automatically combines batteries during charging and isolates them when discharging or starting the engine, ensuring optimal battery performance and longevity.

Advanced Battery Management:

When paired with the ML-RBS Remote Battery Switch (sold separately), the ML-ACR provides complete push-button battery management. The system automatically shares charge from an engine's alternator between start and auxiliary batteries while offering emergency combine functionality to assist with starting when the engine battery is low. The included Contura-style remote switch offers three modes: ON (manual combine), AUTO (automatic charging management), and OFF (isolation).

Key Features:

  • Dual sensing technology monitors charge status in each battery bank independently
  • Selectable Start Isolation or Engine Isolation modes protect sensitive electronics during current spikes
  • Ignition protected design (ISO 8846, SAE J1171) allows installation in gasoline engine compartments
  • Ultra-low current draw (less than 40mA) for monitoring with minimal battery drain
  • Remote switch operation eliminates costly heavy-gauge cable runs throughout the vessel
  • Manual override lever provides emergency control if remote power is compromised
  • LED indicators clearly display current operating mode
  • Compatible with Blue Sea Systems 9160 Paralleling Link Bus for multiple switch configurations
  • IP66 rated for water and dust resistance

Technical Specifications:

  • Continuous rating: 500 amps
  • Intermittent rating: 700 amps
  • Live current switching: 300A at 12V DC
  • Recommended cable size: 4/0 AWG
  • Terminal stud size: 3/8 inch
  • Operating current: 13mA (less than 7A when changing state)
  • Weight: 4 lbs
  • CE marked, lifetime warranty

This professional-grade ACR eliminates the need for external voltage regulators or isolators, providing efficient single-source charging for dual battery banks while maintaining proper isolation to prevent accidental discharge and protect sensitive marine electronics.

Products specifications

Amperage

700 Amps at 12 Volts DC

Mounting Hardware

Mounting Screws (Sold Separately)

Type

Charging Relays

ISO Approved

ISO 8846 and SAE J1171

Warranty Details

Lifetime

good price!

Great and professional shopping experience. Will use again. Fast delivery. Very pleased.

So far so good

Wonderful and easy

Everything was good I just wished shipping time was shorter

so far so good, easy and quick to order!

Order was fast and easy

Great!!

So far so good. You&rsquo;re only as good as my last order.

Nice and easy

I like how autoplicty puts listing on ebay so you have more options for cheaper prices.

Just received my order! I placed the order Sunday night and received it on Tuesday, super fast shipping! The SS vent caps look great and arrived in perfect condition. Thanks!

piece of cake for a non tech person

exellent

incredibly fast processing, inventory, and price.shipped next day. awesome site

Great transaction at a great price.

simple and user friendly

USLP MUCHO BUENO

Very cheap we will see

Great price & part in stock & was told would ship today !

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