Samlex 160A Automatic Charge Isolator - 12V or 24V

The Samlex 160A Automatic Charge Isolator (ACR-160) is an essential marine electrical management device for serious anglers and boaters who rely on dual-battery systems. After years on the water, any experienced skipper knows that a dead starter battery means a dead boat—and that's precisely what this isolator prevents. This 12V or 24V unit automatically manages power distribution between your main engine battery and auxiliary house batteries, ensuring your engine starts reliably every time while your trolling motor, fish finder, and cabin electronics stay powered all day long.

The ACR-160 operates with sophisticated automatic logic that charges all batteries when the engine runs, then seamlessly isolates the starter battery once charging stops, protecting it from deep discharge caused by cabin loads. Its 160-amp capacity handles high-output alternators common on modern fishing vessels and cruisers without voltage drop. The isolator prioritizes starter battery voltage, meaning your engine battery always maintains reserve capacity for reliable cranking—even if auxiliary batteries dip dangerously low. Compact dimensions (4 x 3 x 6 inches) and lightweight construction (1.1 lbs) make installation simple in tight engine compartments, while Samlex America's proven reliability ensures trouble-free performance season after season.

This charge isolator is ideal for any boater running auxiliary systems—whether you're running a saltwater offshore rig with multiple electronics, a freshwater bass boat with twin trolling motors, or a cruising sailboat with refrigeration and navigation gear. It's equally valuable for RV and truck camper setups where separating house and starter battery loads prevents stranding scenarios. Available in both 12V and 24V configurations, the ACR-160 integrates seamlessly into existing systems without complex wiring modifications, making it the smarter alternative to costly battery isolator relays or manual switches.