Tired of worrying about your main battery dying when you're using accessories off your second battery? This 250 Amp dual battery isolator is the answer. It's a smart voltage-sensitive relay (VSR) that automatically connects your auxiliary battery to charge when the engine is running (around 13.5V-16V for 12V systems, 27V-32V for 24V). Then, when you turn off the engine, it disconnects to protect your starter battery from being drained. That means you can run lights, fridges, winches, or other gear off your second battery without ever getting stranded. It handles up to 250 amps continuous current, works with 12V or 24V systems, and even has a setting for lithium batteries. Includes an LCD screen to monitor both battery voltages, an emergency override button, and it's compact and easy to wire up. Perfect for trucks, RVs, boats, ATVs, campers – any vehicle with a dual-battery setup. Install it once and enjoy peace of mind on every trip.
