To eliminate the multi-battery drain problem, a Sure Power Isolator acts as a check valve between the batteries, preventing current from flowing from one battery to another. Each battery is isolated and acts as an independent power source. So no matter how drained your accessory batteries become, they will never drain power from the battery you're depending on to start your engine. When the current is used from battery #2 (however many), the check valve (diode) stops current flow from Battery #1. When the alternator is charging, current can only flow in one direction, from the alternator to the batteries. Each battery then determines the amount of current which flows into it by it's own state of charge based on the voltage regulator setting. With this system, the alternator is protected, the batteries are protected and your family or passengers are protected. The balanced circuit electronic Isolator is absolutely the only way that proper isolation and control can be accomplished, solving every multi-battery problem.
Sure Power Industries invented and has been producing Isolators since 1959. Sure Power builds the finest Isolator products on the market for 6 through 48 volt systems, with one or two charging systems, 2 or 3 battery banks, and current capacities of 25 through 350 amps. Sure Power Isolators are standard equipment on many boats, ships, RV's, trucks, police, fire, emergency vehicles, industrial equipment and military vehicles.
