Product Overview
M-ACR AUTO CHARGING RELAY
Keep your onboard electronics humming and your batteries topped off with the Blue Seas M-ACR AUTO CHARGING RELAY. This compact, intelligent relay automatically manages the charging of your starting and house battery banks, ensuring both are ready when you need them. It eliminates the hassle of manual switching while protecting sensitive electronics from voltage fluctuations during engine starting. Perfect for boats with outboards and smaller inboards, the M-ACR simplifies battery management and provides peace of mind on the water.
Key Features
- **Automatic Charging:** Intelligently combines batteries during charging and isolates them during discharge, optimizing charging efficiency and preventing battery drain.
- **Start Isolation Protection:** Shields sensitive electronics from damaging voltage sags and spikes during engine cranking.
- **Dual Sensing:** Detects charging voltage on either battery bank, ensuring both receive a full charge regardless of the charging source.
- **Compact and Versatile Mounting:** Three mounting options (surface, rear, or panel) offer flexibility for various installation locations.
- **Waterproof Design:** IP67 rating ensures reliable performance even in harsh marine environments, withstanding temporary immersion.
- **Handles Alternators up to 65A:** Ideal for most outboards and many inboard engines.
- **Clear LED Indicator:** Provides at-a-glance status of the relay's operation (combined, isolated, start isolation active, or undervoltage lockout).
- **Ignition Protected:** Safe for installation on gasoline-powered boats.
Specifications
The Captain's Take
After years of wrestling with manual battery switches, I installed the Blue Seas M-ACR and haven't looked back. This little relay is a game-changer. It keeps my house batteries fully charged without overcharging my starting battery, and the start isolation feature gives me confidence that my electronics are protected. It's a simple, reliable solution that I recommend to every boater.
