MaySpare 250 Amp Dual Battery Smart Isolator

This heavy-duty 250 Amp dual battery smart isolator is designed to protect your vehicle's primary battery. It automatically combines two batteries when the alternator is charging (engine running) and isolates them when not charging (engine off), ensuring you can always start your vehicle. Ideal for 12V/24V trucks, ATVs, UTVs, boats, RVs, and other vehicles, it features an LCD display for battery voltage and a delay function for automatic connection and disconnection. Its compact size allows for easy installation anywhere, requiring only power wire in and power wire out.